Devices on FHIR - Point-of-Care Device General Implementation Guide

DeviceMetric Profiles

Scope and Usage

These DeviceMetric profiles are part of the Point-of-Care Device General Implementation Guide. A set of DeviceMetric resources represent measurements, calculations, status, and settings of a medical device.

A compliant device shall have DeviceMetric resources according to the Numeric, Enumeration, and Sample Array DeviceMetric profiles. The profiles define the following rules:

DeviceMetric.type shall have a coding from the ISO/IEEE 11073 MDC metrics nomenclature. The Rosetta Terminology Mapping Management System (RTMMS) lists available codes. DeviceMetric.type.coding allows additional coding from other code systems.
DeviceMetric.unit is optional for Numeric and Sample Array DeviceMetric resources. If present, it shall have a coding from the ISO/IEEE 11073 MDC units of measurement. DeviceMetric.unit.coding allows additional coding from other code systems.
DeviceMetric.source shall be present and refer to a Device resource according to the PoC Device profile.
DeviceMetric.parent shall be present and refer to the Channel DeviceComponent resource where this metric belongs to.

Content

StructureDefinition	Description	Example
Numeric DeviceMetric Profile	Characteristics and operational status of a numerical measurement, calculation, or setting	NBP Numeric DeviceMetric
Enumeration DeviceMetric Profile	Characteristics and operational status of status or annotation information as codes or text	Rhythm Status Enumeration DeviceMetric
Sample Array DeviceMetric Profile (to be completed)	Characteristics and operational status of a real-time waveform or wave snippet

Numeric DeviceMetric Profile

Canonical URL

http://devices.fhir.org/StructureDefinition/NumericDeviceMetric

Profile Definition

DeviceMetric	I		DeviceMetric	There are no (further) constraints on this element Element id DeviceMetric Short description Measurement, calculation or setting capability of a medical device Definition Describes a measurement, calculation or setting capability of a medical device. Comments For the initial scope, this DeviceMetric resource is only applicable to describe a single metric node in the containment tree that is produced by the context scanner in any medical device that implements or derives from the ISO/IEEE 11073 standard. Data type DeviceMetric Constraints dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources `contained.contained.empty()` dom-1: If the resource is contained in another resource, it SHALL NOT contain any narrative `contained.text.empty()` dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()` dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource `contained.where(('#'+id in %resource.descendants().reference).not()).empty()` Mappings rim: Entity. Role, or Act w5: administrative.device
id	Σ	0..1	id	There are no (further) constraints on this element Element id DeviceMetric.id Short description Logical id of this artifact Definition The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. Comments The only time that a resource does not have an id is when it is being submitted to the server using a create operation. Data type id Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
meta	Σ	0..1	Meta	There are no (further) constraints on this element Element id DeviceMetric.meta Short description Metadata about the resource Definition The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content may not always be associated with version changes to the resource. Data type Meta Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a rim: N/A
implicitRules	Σ ?!	0..1	uri	There are no (further) constraints on this element Element id DeviceMetric.implicitRules Short description A set of rules under which this content was created Definition A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Comments Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. This element is labelled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
language		0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.language Short description Language of the resource content Definition The base language in which the resource is written. Comments Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute). Data type code Binding A human language. ?? (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
text	I	0..1	Narrative	There are no (further) constraints on this element Element id DeviceMetric.text Short description Text summary of the resource, for human interpretation Alternate names narrative, html, xhtml, display Definition A human-readable narrative that contains a summary of the resource, and may be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety. Comments Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded in formation is added later. Data type Narrative Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a rim: N/A rim: Act.text?
contained		0..*	Resource	There are no (further) constraints on this element Element id DeviceMetric.contained Short description Contained, inline Resources Alternate names inline resources, anonymous resources, contained resources Definition These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope. Comments This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Data type Resource Mappings rim: Entity. Role, or Act rim: N/A
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
modifierExtension	?! I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.modifierExtension Short description Extensions that cannot be ignored Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
identifier	Σ	1..1	Identifier	There are no (further) constraints on this element Element id DeviceMetric.identifier Short description Unique identifier of this DeviceMetric Definition Describes the unique identification of this metric that has been assigned by the device or gateway software. For example: handle ID. It should be noted that in order to make the identifier unique, the system element of the identifier should be set to the unique identifier of the device. Data type Identifier Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CX / EI (occasionally, more often EI maps to a resource id or a URL) rim: II - see see identifier pattern at http://wiki.hl7.org/index.php?title=Common_Design_Patterns#Identifier_Pattern for relevant discussion. The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT] servd: Identifier w5: id
type	Σ	1..1	CodeableConceptBinding	Element id DeviceMetric.type Short description Numeric type Definition DeviceMetric.type shall have a coding from the ISO/IEEE 11073 MDC metrics nomenclature. The Rosetta Terminology Mapping Management System (RTMMS) lists available codes. DeviceMetric.type.coding allows additional coding from other code systems. Comments DeviceMetric.type can be referred to either IEEE 11073-10101 or LOINC. Data type CodeableConcept Binding Describes the metric type. ?? (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: class
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.type.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
coding	Σ	1..*	Coding	Element id DeviceMetric.type.coding Short description Code defined by a terminology system Definition A reference to a code defined by a terminology system. Requirements Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. Comments Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true. Data type Coding Sliced: Unordered, Open, by system(Value) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6 rim: CV orim: fhir:Coding rdfs:subClassOf dt:CDCoding v2: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
11073MDC	Σ	1..1	Coding	Element id DeviceMetric.type.coding:11073MDC Short description 11073 MDC code Definition Code defined by the ISO/IEEE 11073-10101 Nomenclature Requirements Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. Comments Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true. Data type Coding Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6 rim: CV orim: fhir:Coding rdfs:subClassOf dt:CDCoding v2: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
system	Σ	1..1	uriFixed Value	Element id DeviceMetric.type.coding:11073MDC.system Short description Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code. Requirements Need to be unambiguous about the source of the definition of the symbol. Comments The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Fixed value urn:iso:std:iso:11073:10101 Mappings rim: n/a v2: CE.3 rim:* ./codeSystem orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
version	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.version Short description Version of the system - if relevant Definition The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged. Comments Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.7 rim:* ./codeSystemVersion orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
code	Σ	1..1	code	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.code Short description Symbol in syntax defined by the system Definition A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination). Requirements Need to refer to a particular code in the system. Comments Note that FHIR strings may not exceed 1MB in size Data type code Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.1 rim:* ./code orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
display	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.display Short description Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system. Requirements Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.2 - but note this is not well followed rim:* CV.displayName orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
userSelected	Σ	0..1	boolean	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.userSelected Short description If this coding was chosen directly by the user Definition Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). Requirements This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Comments Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely. Data type boolean Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: Sometimes implied by being first rim: CD.codingRationale orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
text	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.text Short description Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user. Requirements The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Comments Very often the text is the same as a displayName of one of the codings. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.9. But note many systems use CE.2 for this rim: ./originalText[mediaType/code="text/plain"]/data orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
unit	Σ	0..1	CodeableConceptBinding	Element id DeviceMetric.unit Short description Unit of measure Definition DeviceMetric.unit is optional. If present, it shall have a coding from the ISO/IEEE 11073 MDC units of measurement. DeviceMetric.unit.coding allows additional coding from other code systems. Comments DeviceMetric.unit can refer to either UCUM or preferable a RTMMS coding system. Data type CodeableConcept Binding Describes the unit of the metric. ?? (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.unit.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.unit.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
coding	Σ	1..*	Coding	Element id DeviceMetric.unit.coding Short description Code defined by a terminology system Definition A reference to a code defined by a terminology system. Requirements Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. Comments Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true. Data type Coding Sliced: Unordered, Open, by system(Value) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6 rim: CV orim: fhir:Coding rdfs:subClassOf dt:CDCoding v2: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
11073MDC	Σ	1..1	Coding	Element id DeviceMetric.unit.coding:11073MDC Short description 11073 MDC code Definition Code defined by the ISO/IEEE 11073-10101 Nomenclature Requirements Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. Comments Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true. Data type Coding Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6 rim: CV orim: fhir:Coding rdfs:subClassOf dt:CDCoding v2: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.unit.coding:11073MDC.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.unit.coding:11073MDC.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
system	Σ	1..1	uriFixed Value	Element id DeviceMetric.unit.coding:11073MDC.system Short description Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code. Requirements Need to be unambiguous about the source of the definition of the symbol. Comments The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Fixed value urn:iso:std:iso:11073:10101 Mappings rim: n/a v2: CE.3 rim:* ./codeSystem orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
version	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.unit.coding:11073MDC.version Short description Version of the system - if relevant Definition The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged. Comments Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.7 rim:* ./codeSystemVersion orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
code	Σ	1..1	code	There are no (further) constraints on this element Element id DeviceMetric.unit.coding:11073MDC.code Short description Symbol in syntax defined by the system Definition A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination). Requirements Need to refer to a particular code in the system. Comments Note that FHIR strings may not exceed 1MB in size Data type code Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.1 rim:* ./code orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
display	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.unit.coding:11073MDC.display Short description Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system. Requirements Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.2 - but note this is not well followed rim:* CV.displayName orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
userSelected	Σ	0..1	boolean	There are no (further) constraints on this element Element id DeviceMetric.unit.coding:11073MDC.userSelected Short description If this coding was chosen directly by the user Definition Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). Requirements This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Comments Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely. Data type boolean Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: Sometimes implied by being first rim: CD.codingRationale orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
text	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.unit.text Short description Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user. Requirements The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Comments Very often the text is the same as a displayName of one of the codings. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.9. But note many systems use CE.2 for this rim: ./originalText[mediaType/code="text/plain"]/data orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
source	Σ I	1..1	Reference(PoC Device Profile)	Element id DeviceMetric.source Short description Describes the link to the source Device Definition DeviceMetric.source shall be present and refer to a Device resource according to the PoC Device profile. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Data type Reference(PoC Device Profile) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
parent	Σ I	1..1	Reference(Channel DeviceComponent Profile)	Element id DeviceMetric.parent Short description Describes the link to the parent DeviceComponent Definition DeviceMetric.parent shall be present and refer to the Channel DeviceComponent resource where this metric belongs to. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Data type Reference(Channel DeviceComponent Profile) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
operationalStatus	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.operationalStatus Short description on \| off \| standby \| entered-in-error Definition Indicates current operational state of the device. For example: On, Off, Standby, etc. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the operational status of the DeviceMetric. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
color	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.color Short description black \| red \| green \| yellow \| blue \| magenta \| cyan \| white Definition Describes the color representation for the metric. This is often used to aid clinicians to track and identify parameter types by color. In practice, consider a Patient Monitor that has ECG/HR and Pleth for example; the parameters are displayed in different characteristic colors, such as HR-blue, BP-green, and PR and SpO2- magenta. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the typical color of representation. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
category	Σ	1..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.category Short description measurement \| setting \| calculation \| unspecified Definition Indicates the category of the observation generation process. A DeviceMetric can be for example a setting, measurement, or calculation. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the category of the metric. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a w5: class
measurementPeriod	Σ	0..1	Timing	There are no (further) constraints on this element Element id DeviceMetric.measurementPeriod Short description Describes the measurement repetition time Definition Describes the measurement repetition time. This is not necessarily the same as the update period. The measurement repetition time can range from milliseconds up to hours. An example for a measurement repetition time in the range of milliseconds is the sampling rate of an ECG. An example for a measurement repetition time in the range of hours is a NIBP that is triggered automatically every hour. The update period may be different than the measurement repetition time, if the device does not update the published observed value with the same frequency as it was measured. Comments A timing schedule can be either a list of events - intervals on which the event occurs, or a single event with repeating criteria or just repeating criteria with no actual event. When both event and a repeating specification are provided, the list of events should be understood as an interpretation of the information in the repeat structure. Data type Timing Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: N/A rim: QSET<TS> (GTS)
calibration	Σ	0..*	BackboneElement	There are no (further) constraints on this element Element id DeviceMetric.calibration Short description Describes the calibrations that have been performed or that are required to be performed Definition Describes the calibrations that have been performed or that are required to be performed. Data type BackboneElement Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.calibration.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.calibration.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.calibration.modifierExtension Short description Extensions that cannot be ignored Alternate names extensions, user content, modifiers Definition May be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
type	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.calibration.type Short description unspecified \| offset \| gain \| two-point Definition Describes the type of the calibration method. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the type of a metric calibration. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
state	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.calibration.state Short description not-calibrated \| calibration-required \| calibrated \| unspecified Definition Describes the state of the calibration. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the state of a metric calibration. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
time	Σ	0..1	instant	There are no (further) constraints on this element Element id DeviceMetric.calibration.time Short description Describes the time last calibration has been performed Definition Describes the time last calibration has been performed. Comments Note: This is intended for precisely observed times, typically system logs etc., and not human-reported times - for them, see date and dateTime below. Time zone is always required Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a

Example (XML view)

Example of a NBP Numeric DeviceMetric

<DeviceMetric xmlns="http://hl7.org/fhir">
    <id value="216" />
    <meta>
        <profile value="http://devices.fhir.org/StructureDefinition/NumericDeviceMetric" />
    </meta>
    <identifier>
        <use value="temp" />
        <system value="urn:ietf:rfc:3986" />
        <value value="urn:uuid:77616af6-9071-408a-8e4f-0f69dab756d4" />
    </identifier>
    <type>
        <coding>
            <system value="urn:iso:std:iso:11073:10101" />
            <code value="150020" />
            <display value="MDC_PRESS_BLD_NONINV" />
        </coding>
        <text value="NBP" />
    </type>
    <unit>
        <coding>
            <system value="urn:iso:std:iso:11073:10101" />
            <code value="266016" />
            <display value="MDC_DIM_MMHG" />
        </coding>
        <text value="mmHg" />
    </unit>
    <source>
        <reference value="Device/72" />
    </source>
    <parent>
        <reference value="DeviceComponent/432" />
    </parent>
    <operationalStatus value="on" />
    <color value="red" />
    <category value="measurement" />
    <measurementPeriod>
        <repeat>
            <frequency value="1" />
            <period value="15" />
            <periodUnit value="min" />
        </repeat>
    </measurementPeriod>
</DeviceMetric>

Example (JSON view)

Example of a NBP Numeric DeviceMetric

{
    "resourceType": "DeviceMetric",
    "id": "216",
    "meta": {
        "profile":  [
            "http://devices.fhir.org/StructureDefinition/NumericDeviceMetric"
        ]
    },
    "identifier": {
        "use": "temp",
        "system": "urn:ietf:rfc:3986",
        "value": "urn:uuid:77616af6-9071-408a-8e4f-0f69dab756d4"
    },
    "type": {
        "coding":  [
            {
                "system": "urn:iso:std:iso:11073:10101",
                "code": "150020",
                "display": "MDC_PRESS_BLD_NONINV"
            }
        ],
        "text": "NBP"
    },
    "unit": {
        "coding":  [
            {
                "system": "urn:iso:std:iso:11073:10101",
                "code": "266016",
                "display": "MDC_DIM_MMHG"
            }
        ],
        "text": "mmHg"
    },
    "source": {
        "reference": "Device/72"
    },
    "parent": {
        "reference": "DeviceComponent/432"
    },
    "operationalStatus": "on",
    "color": "red",
    "category": "measurement",
    "measurementPeriod": {
        "repeat": {
            "frequency": 1,
            "period": 15,
            "periodUnit": "min"
        }
    }
}

Enumeration DeviceMetric Profile

Canonical URL

http://devices.fhir.org/StructureDefinition/EnumerationDeviceMetric

Profile Definition

DeviceMetric	I		DeviceMetric	There are no (further) constraints on this element Element id DeviceMetric Short description Measurement, calculation or setting capability of a medical device Definition Describes a measurement, calculation or setting capability of a medical device. Comments For the initial scope, this DeviceMetric resource is only applicable to describe a single metric node in the containment tree that is produced by the context scanner in any medical device that implements or derives from the ISO/IEEE 11073 standard. Data type DeviceMetric Constraints dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources `contained.contained.empty()` dom-1: If the resource is contained in another resource, it SHALL NOT contain any narrative `contained.text.empty()` dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated `contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()` dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource `contained.where(('#'+id in %resource.descendants().reference).not()).empty()` Mappings rim: Entity. Role, or Act w5: administrative.device
id	Σ	0..1	id	There are no (further) constraints on this element Element id DeviceMetric.id Short description Logical id of this artifact Definition The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes. Comments The only time that a resource does not have an id is when it is being submitted to the server using a create operation. Data type id Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
meta	Σ	0..1	Meta	There are no (further) constraints on this element Element id DeviceMetric.meta Short description Metadata about the resource Definition The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content may not always be associated with version changes to the resource. Data type Meta Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a rim: N/A
implicitRules	Σ ?!	0..1	uri	There are no (further) constraints on this element Element id DeviceMetric.implicitRules Short description A set of rules under which this content was created Definition A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Comments Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. This element is labelled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
language		0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.language Short description Language of the resource content Definition The base language in which the resource is written. Comments Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute). Data type code Binding A human language. ?? (extensible) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
text	I	0..1	Narrative	There are no (further) constraints on this element Element id DeviceMetric.text Short description Text summary of the resource, for human interpretation Alternate names narrative, html, xhtml, display Definition A human-readable narrative that contains a summary of the resource, and may be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it "clinically safe" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety. Comments Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied). This may be necessary for data from legacy systems where information is captured as a "text blob" or where text is additionally entered raw or narrated and encoded in formation is added later. Data type Narrative Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a rim: N/A rim: Act.text?
contained		0..*	Resource	There are no (further) constraints on this element Element id DeviceMetric.contained Short description Contained, inline Resources Alternate names inline resources, anonymous resources, contained resources Definition These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope. Comments This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Data type Resource Mappings rim: Entity. Role, or Act rim: N/A
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
modifierExtension	?! I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.modifierExtension Short description Extensions that cannot be ignored Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the resource, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
identifier	Σ	1..1	Identifier	There are no (further) constraints on this element Element id DeviceMetric.identifier Short description Unique identifier of this DeviceMetric Definition Describes the unique identification of this metric that has been assigned by the device or gateway software. For example: handle ID. It should be noted that in order to make the identifier unique, the system element of the identifier should be set to the unique identifier of the device. Data type Identifier Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CX / EI (occasionally, more often EI maps to a resource id or a URL) rim: II - see see identifier pattern at http://wiki.hl7.org/index.php?title=Common_Design_Patterns#Identifier_Pattern for relevant discussion. The Identifier class is a little looser than the v3 type II because it allows URIs as well as registered OIDs or GUIDs. Also maps to Role[classCode=IDENT] servd: Identifier w5: id
type	Σ	1..1	CodeableConceptBinding	Element id DeviceMetric.type Short description Enumeration type Definition DeviceMetric.type shall have a coding from the ISO/IEEE 11073 MDC metrics nomenclature. The Rosetta Terminology Mapping Management System (RTMMS) lists available codes. DeviceMetric.type.coding allows additional coding from other code systems. Comments DeviceMetric.type can be referred to either IEEE 11073-10101 or LOINC. Data type CodeableConcept Binding Describes the metric type. ?? (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD w5: class
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.type.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
coding	Σ	1..*	Coding	Element id DeviceMetric.type.coding Short description Code defined by a terminology system Definition A reference to a code defined by a terminology system. Requirements Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. Comments Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true. Data type Coding Sliced: Unordered, Open, by system(Value) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6 rim: CV orim: fhir:Coding rdfs:subClassOf dt:CDCoding v2: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
11073MDC	Σ	1..1	Coding	Element id DeviceMetric.type.coding:11073MDC Short description 11073 MDC code Definition Code defined by the ISO/IEEE 11073-10101 Nomenclature Requirements Allows for translations and alternate encodings within a code system. Also supports communication of the same instance to systems requiring different encodings. Comments Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information. Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true. Data type Coding Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE subset one of the sets of component 1-3 or 4-6 rim: CV orim: fhir:Coding rdfs:subClassOf dt:CDCoding v2: CE.1-8, CE.10-22 rim: union(., ./translation) orim: fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
system	Σ	1..1	uriFixed Value	Element id DeviceMetric.type.coding:11073MDC.system Short description Identity of the terminology system Definition The identification of the code system that defines the meaning of the symbol in the code. Requirements Need to be unambiguous about the source of the definition of the symbol. Comments The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...). OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should de-reference to some definition that establish the system clearly and unambiguously. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Fixed value urn:iso:std:iso:11073:10101 Mappings rim: n/a v2: CE.3 rim:* ./codeSystem orim: fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem
version	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.version Short description Version of the system - if relevant Definition The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured. and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged. Comments Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.7 rim:* ./codeSystemVersion orim: fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion
code	Σ	1..1	code	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.code Short description Symbol in syntax defined by the system Definition A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination). Requirements Need to refer to a particular code in the system. Comments Note that FHIR strings may not exceed 1MB in size Data type code Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.1 rim:* ./code orim: fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code
display	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.display Short description Representation defined by the system Definition A representation of the meaning of the code in the system, following the rules of the system. Requirements Need to be able to carry a human-readable meaning of the code for readers that do not know the system. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.2 - but note this is not well followed rim:* CV.displayName orim: fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName
userSelected	Σ	0..1	boolean	There are no (further) constraints on this element Element id DeviceMetric.type.coding:11073MDC.userSelected Short description If this coding was chosen directly by the user Definition Indicates that this coding was chosen by a user directly - i.e. off a pick list of available items (codes or displays). Requirements This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing. Comments Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely. Data type boolean Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: Sometimes implied by being first rim: CD.codingRationale orim: fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map; fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [ fhir:source "true"; fhir:target dt:CDCoding.codingRationale\#O ]
text	Σ	0..1	string	There are no (further) constraints on this element Element id DeviceMetric.type.text Short description Plain text representation of the concept Definition A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user. Requirements The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source. Comments Very often the text is the same as a displayName of one of the codings. Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE.9. But note many systems use CE.2 for this rim: ./originalText[mediaType/code="text/plain"]/data orim: fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText
unit	Σ	0..0	CodeableConceptBinding	There are no (further) constraints on this element Element id DeviceMetric.unit Short description Unit of Measure for the Metric Definition Describes the unit that an observed value determined for this metric will have. For example: Percent, Seconds, etc. Comments DeviceMetric.unit can refer to either UCUM or preferable a RTMMS coding system. Data type CodeableConcept Binding Describes the unit of the metric. ?? (preferred) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: CE/CNE/CWE rim: CD orim: fhir:CodeableConcept rdfs:subClassOf dt:CD
source	Σ I	1..1	Reference(PoC Device Profile)	Element id DeviceMetric.source Short description Describes the link to the source Device Definition DeviceMetric.source shall be present and refer to a Device resource according to the PoC Device profile. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Data type Reference(PoC Device Profile) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
parent	Σ I	1..1	Reference(Channel DeviceComponent Profile)	Element id DeviceMetric.parent Short description Describes the link to the parent DeviceComponent Definition DeviceMetric.parent shall be present and refer to the Channel DeviceComponent resource where this metric belongs to. Comments References SHALL be a reference to an actual FHIR resource, and SHALL be resolveable (allowing for access control, temporary unavailability, etc). Resolution can be either by retrieval from the URL, or, where applicable by resource type, by treating an absolute reference as a canonical URL and looking it up in a local registry/repository. Data type Reference(Channel DeviceComponent Profile) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ref-1: SHALL have a contained resource if a local reference is provided `reference.startsWith('#').not() or (reference.substring(1).trace('url') in %resource.contained.id.trace('ids'))` Mappings rim: n/a rim: The target of a resource reference is a RIM entry point (Act, Role, or Entity)
operationalStatus	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.operationalStatus Short description on \| off \| standby \| entered-in-error Definition Indicates current operational state of the device. For example: On, Off, Standby, etc. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the operational status of the DeviceMetric. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
color	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.color Short description black \| red \| green \| yellow \| blue \| magenta \| cyan \| white Definition Describes the color representation for the metric. This is often used to aid clinicians to track and identify parameter types by color. In practice, consider a Patient Monitor that has ECG/HR and Pleth for example; the parameters are displayed in different characteristic colors, such as HR-blue, BP-green, and PR and SpO2- magenta. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the typical color of representation. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
category	Σ	1..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.category Short description measurement \| setting \| calculation \| unspecified Definition Indicates the category of the observation generation process. A DeviceMetric can be for example a setting, measurement, or calculation. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the category of the metric. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a w5: class
measurementPeriod	Σ	0..1	Timing	There are no (further) constraints on this element Element id DeviceMetric.measurementPeriod Short description Describes the measurement repetition time Definition Describes the measurement repetition time. This is not necessarily the same as the update period. The measurement repetition time can range from milliseconds up to hours. An example for a measurement repetition time in the range of milliseconds is the sampling rate of an ECG. An example for a measurement repetition time in the range of hours is a NIBP that is triggered automatically every hour. The update period may be different than the measurement repetition time, if the device does not update the published observed value with the same frequency as it was measured. Comments A timing schedule can be either a list of events - intervals on which the event occurs, or a single event with repeating criteria or just repeating criteria with no actual event. When both event and a repeating specification are provided, the list of events should be understood as an interpretation of the information in the repeat structure. Data type Timing Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a v2: N/A rim: QSET<TS> (GTS)
calibration	Σ	0..*	BackboneElement	There are no (further) constraints on this element Element id DeviceMetric.calibration Short description Describes the calibrations that have been performed or that are required to be performed Definition Describes the calibrations that have been performed or that are required to be performed. Data type BackboneElement Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
id		0..1	string	There are no (further) constraints on this element Element id DeviceMetric.calibration.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.calibration.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
modifierExtension	Σ ?! I	0..*	Extension	There are no (further) constraints on this element Element id DeviceMetric.calibration.modifierExtension Short description Extensions that cannot be ignored Alternate names extensions, user content, modifiers Definition May be used to represent additional information that is not part of the basic definition of the element, and that modifies the understanding of the element that contains it. Usually modifier elements provide negation or qualification. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
type	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.calibration.type Short description unspecified \| offset \| gain \| two-point Definition Describes the type of the calibration method. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the type of a metric calibration. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
state	Σ	0..1	codeBinding	There are no (further) constraints on this element Element id DeviceMetric.calibration.state Short description not-calibrated \| calibration-required \| calibrated \| unspecified Definition Describes the state of the calibration. Comments Note that FHIR strings may not exceed 1MB in size Data type code Binding Describes the state of a metric calibration. ?? (required) Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
time	Σ	0..1	instant	There are no (further) constraints on this element Element id DeviceMetric.calibration.time Short description Describes the time last calibration has been performed Definition Describes the time last calibration has been performed. Comments Note: This is intended for precisely observed times, typically system logs etc., and not human-reported times - for them, see date and dateTime below. Time zone is always required Data type instant Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a

Example (XML view)

Example of a Rhythm Status Enumeration DeviceMetric

<DeviceMetric xmlns="http://hl7.org/fhir">
    <id value="221" />
    <meta>
        <profile value="http://devices.fhir.org/StructureDefinition/EnumerationDeviceMetric" />
    </meta>
    <identifier>
        <use value="temp" />
        <system value="urn:ietf:rfc:3986" />
        <value value="urn:uuid:a7606788-a5ad-4ed8-a8a2-ead3d49442b7" />
    </identifier>
    <type>
        <coding>
            <system value="urn:iso:std:iso:11073:10101" />
            <code value="184327" />
            <display value="MDC_ECG_STAT_RHY" />
        </coding>
        <text value="Rhythm Status" />
    </type>
    <source>
        <reference value="Device/72" />
    </source>
    <parent>
        <reference value="DeviceComponent/429" />
    </parent>
    <operationalStatus value="on" />
    <category value="measurement" />
</DeviceMetric>

Example (JSON view)

Example of a Rhythm Status Enumeration DeviceMetric

{
    "resourceType": "DeviceMetric",
    "id": "221",
    "meta": {
        "profile":  [
            "http://devices.fhir.org/StructureDefinition/EnumerationDeviceMetric"
        ]
    },
    "identifier": {
        "use": "temp",
        "system": "urn:ietf:rfc:3986",
        "value": "urn:uuid:a7606788-a5ad-4ed8-a8a2-ead3d49442b7"
    },
    "type": {
        "coding":  [
            {
                "system": "urn:iso:std:iso:11073:10101",
                "code": "184327",
                "display": "MDC_ECG_STAT_RHY"
            }
        ],
        "text": "Rhythm Status"
    },
    "source": {
        "reference": "Device/72"
    },
    "parent": {
        "reference": "DeviceComponent/429"
    },
    "operationalStatus": "on",
    "category": "measurement"
}

Sample Array DeviceMetric Profile

(to be completed)