Release 4B

This page is part of the FHIR Specification (v4.3.0: R4B - STU). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4 R3

10.1.14.81 StructureDefinition: observation-bmi

Orders and Observations Work Group Maturity Level: 0Trial Use Use Context: Any

The official URL for this profile is: 

http://hl7.org/fhir/StructureDefinition/bmi

FHIR Body Mass Index (BMI) Profile

This profile was published on Mon, Nov 17, 2014 00:00+1100 as a draft by Health Level Seven International (Health Care Devices).

10.1.14.81.1 Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

This structure is derived from observation-vitalsigns.

Summary

10.1.14.81.2 Complete Summary of the Mandatory Requirements

  1. One code in Observation.code which must have
    • a fixed Observation.code.coding.system='http ://loinc.org'
    • a fixed Observation.code.coding.code= '39156-5'
    • Other additional Codings are allowed in Observation.code- e.g. more specific LOINC Codes, SNOMED CT concepts, system specific codes. All codes SHALL have an system value
  2. Either one Observation.valueQuantity or, if there is no value, one code in Observation.DataAbsentReason
    • Each Observation.valueQuantity must have:
      • One numeric value in Observation.valueQuantity.value
      • a fixed Observation.valueQuantity.system="http://unitsofmeasure.org"
      • a UCUM unit code in Observation.valueQuantity.code = 'kg/m2'

Mandatory: 8 elements
Must-Support: 4 elements
Fixed Value: 4 elements

Slices

This structure defines the following Slices:

  • The element Observation.code.coding is sliced based on the values of value:code, value:system

This structure is derived from observation-vitalsigns.

NameFlagsCard.TypeDescription & Constraintsdoco
.. Observation 0..*observation-vitalsignsFHIR Body Mass Index (BMI) Profile
... code 1..1CodeableConceptBody Mass Index (BMI)
.... Slices for coding 0..*CodingCode defined by a terminology system
Slice: Unordered, Open by value:code, value:system
..... coding:BMICode 1..1CodingCode defined by a terminology system
...... system 1..1uriIdentity of the terminology system
Fixed Value: http://loinc.org
...... code 1..1codeSymbol in syntax defined by the system
Fixed Value: 39156-5
... valueQuantity 1..1QuantityVital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
.... value S1..1decimalNumerical value (with implicit precision)
.... unit S1..1stringUnit representation
.... system S1..1uriSystem that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code S1..1codeCoded responses from the common UCUM units for vital signs value set.
Fixed Value: kg/m2

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraintsdoco
.. Observation I0..*observation-vitalsignsFHIR Body Mass Index (BMI) Profile
... id Σ0..1idLogical id of this artifact
... meta Σ0..1MetaMetadata about the resource
... implicitRules ?!Σ0..1uriA set of rules under which this content was created
... language 0..1codeLanguage of the resource content
Binding: Common Languages (preferred): IETF language tag

Additional BindingsPurpose
All LanguagesMax Binding
... text 0..1NarrativeText summary of the resource, for human interpretation
... contained 0..*ResourceContained, inline Resources
... extension 0..*ExtensionAdditional content defined by implementations
... modifierExtension ?!0..*ExtensionExtensions that cannot be ignored
... identifier Σ0..*IdentifierBusiness Identifier for observation
... basedOn Σ0..*Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)Fulfills plan, proposal or order
... partOf Σ0..*Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)Part of referenced event
... status ?!SΣ1..1coderegistered | preliminary | final | amended +
Binding: ObservationStatus (required)
... Slices for category S1..*CodeableConceptClassification of type of observation
Slice: Unordered, Open by value:coding.code, value:coding.system
Binding: Observation Category Codes (preferred): Codes for high level observation categories.


.... category:VSCat S1..1CodeableConceptClassification of type of observation
Binding: Observation Category Codes (preferred): Codes for high level observation categories.


..... id 0..1idUnique id for inter-element referencing
..... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
..... coding SΣ1..*CodingCode defined by a terminology system
...... id 0..1idUnique id for inter-element referencing
...... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
...... system SΣ1..1uriIdentity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
...... version Σ0..1stringVersion of the system - if relevant
...... code SΣ1..1codeSymbol in syntax defined by the system
Fixed Value: vital-signs
...... display Σ0..1stringRepresentation defined by the system
...... userSelected Σ0..1booleanIf this coding was chosen directly by the user
..... text Σ0..1stringPlain text representation of the concept
... code SΣ1..1CodeableConceptBody Mass Index (BMI)
Binding: Vital Signs (extensible): This identifies the vital sign result type. Original source C-CDA R1.1 , HITSP Vital Sign Result Type.

.... id 0..1idUnique id for inter-element referencing
.... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
.... Slices for coding Σ0..*CodingCode defined by a terminology system
Slice: Unordered, Open by value:code, value:system
..... coding:BMICode Σ1..1CodingCode defined by a terminology system
...... id 0..1idUnique id for inter-element referencing
...... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ1..1uriIdentity of the terminology system
Fixed Value: http://loinc.org
...... version Σ0..1stringVersion of the system - if relevant
...... code Σ1..1codeSymbol in syntax defined by the system
Fixed Value: 39156-5
...... display Σ0..1stringRepresentation defined by the system
...... userSelected Σ0..1booleanIf this coding was chosen directly by the user
.... text Σ0..1stringPlain text representation of the concept
... subject SΣ1..1Reference(Patient)Who and/or what the observation is about
... focus Σ0..*Reference(Resource)What the observation is about, when it is not about the subject of record
... encounter Σ0..1Reference(Encounter)Healthcare event during which this observation is made
... effective[x] SΣI1..1Often just a dateTime for Vital Signs
.... effectiveDateTimedateTime
.... effectivePeriodPeriod
... issued Σ0..1instantDate/Time this version was made available
... performer Σ0..*Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)Who is responsible for the observation
... Slices for value[x] SΣI1..1QuantityVital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
Slice: Unordered, Closed by type:$this
Binding: Vital Signs Units (extensible): Commonly encountered UCUM units for recording Vital Signs quantity units as codes. If extending this valueset the codes SHOULD come from UCUM.

.... value[x]:valueQuantity SΣI1..1QuantityVital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
Binding: Vital Signs Units (extensible): Commonly encountered UCUM units for recording Vital Signs quantity units as codes. If extending this valueset the codes SHOULD come from UCUM.

..... id 0..1idUnique id for inter-element referencing
..... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
..... value SΣ1..1decimalNumerical value (with implicit precision)
..... comparator ?!Σ0..1code< | <= | >= | > - how to understand the value
Binding: QuantityComparator (required)
..... unit SΣ1..1stringUnit representation
..... system SΣI1..1uriSystem that defines coded unit form
Fixed Value: http://unitsofmeasure.org
..... code SΣ1..1codeCoded responses from the common UCUM units for vital signs value set.
Fixed Value: kg/m2
... dataAbsentReason SI0..1CodeableConceptWhy the result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.

... interpretation 0..*CodeableConceptHigh, low, normal, etc.
Binding: Observation Interpretation Codes (extensible): Codes identifying interpretations of observations.


... note 0..*AnnotationComments about the observation
... bodySite 0..1CodeableConceptObserved body part
Binding: SNOMED CT Body Structures (example): SNOMED CT Body site concepts

... method 0..1CodeableConceptHow it was done
Binding: Observation Methods (example): Methods for simple observations.

... specimen 0..1Reference(Specimen)Specimen used for this observation
... device 0..1Reference(Device | DeviceMetric)(Measurement) Device
... referenceRange I0..*BackboneElementProvides guide for interpretation
.... id 0..1stringUnique id for inter-element referencing
.... extension 0..*ExtensionAdditional content defined by implementations
.... modifierExtension ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
.... low I0..1SimpleQuantityLow Range, if relevant
.... high I0..1SimpleQuantityHigh Range, if relevant
.... type 0..1CodeableConceptReference range qualifier
Binding: Observation Reference Range Meaning Codes (preferred): Code for the meaning of a reference range.

.... appliesTo 0..*CodeableConceptReference range population
Binding: Observation Reference Range Applies To Codes (example): Codes identifying the population the reference range applies to.


.... age 0..1RangeApplicable age range, if relevant
.... text 0..1stringText based reference range in an observation
... hasMember Σ0..*Reference(QuestionnaireResponse | MolecularSequence | Vital Signs Profile)Used when reporting vital signs panel components
... derivedFrom Σ0..*Reference(DocumentReference | ImagingStudy | QuestionnaireResponse | MolecularSequence | Vital Signs Profile)Related measurements the observation is made from
... component SΣI0..*BackboneElementUsed when reporting systolic and diastolic blood pressure.
.... id 0..1stringUnique id for inter-element referencing
.... extension 0..*ExtensionAdditional content defined by implementations
.... modifierExtension ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
.... code SΣ1..1CodeableConceptType of component observation (code / type)
Binding: Vital Signs (extensible): This identifies the vital sign result type. Original source C-CDA R1.1 , HITSP Vital Sign Result Type.

.... value[x] SΣI0..1Vital Sign Value recorded with UCUM
Binding: Vital Signs Units (extensible): Commonly encountered UCUM units for recording Vital Signs quantity units as codes. If extending this valueset the codes SHOULD come from UCUM.

..... valueQuantityQuantity
..... valueCodeableConceptCodeableConcept
..... valueStringstring
..... valueBooleanboolean
..... valueIntegerinteger
..... valueRangeRange
..... valueRatioRatio
..... valueSampledDataSampledData
..... valueTimetime
..... valueDateTimedateTime
..... valuePeriodPeriod
.... dataAbsentReason SI0..1CodeableConceptWhy the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.

.... interpretation 0..*CodeableConceptHigh, low, normal, etc.
Binding: Observation Interpretation Codes (extensible): Codes identifying interpretations of observations.


.... referenceRange 0..*See referenceRange (Observation)Provides guide for interpretation of component result

doco Documentation for this format
<!-- observation-bmi -->doco

<Observation xmlns="http://hl7.org/fhir"
>
  <!-- from Element: extension -->
 <id value="[id]"/><!-- 0..1 Logical id of this artifact -->
 <meta><!-- ?? 0..1 Meta Metadata about the resource --></meta>
 <implicitRules value="[uri]"/><!-- ?? 0..1 A set of rules under which this content was created -->
 <language value="[code]"/><!-- ?? 0..1 Language of the resource content   -->
 <text><!-- ?? 0..1 Narrative 
     Text summary of the resource, for human interpretation --></text>
 <contained><!-- ?? 0..* Resource Contained, inline Resources --></contained>
 <modifierExtension><!-- ?? 0..* Extension  Extensions that cannot be ignored  --></modifierExtension>
 <identifier><!-- ?? 0..* Identifier 
     Business Identifier for observation --></identifier>
 <basedOn><!-- ?? 0..* Reference(CarePlan) Fulfills plan, proposal or order --></basedOn>
 <partOf><!-- ?? 0..* Reference(MedicationAdministration) Part of referenced event --></partOf>
 <status value="[code]"/><!-- ?? 1..1 registered | preliminary | final | amended +   -->
 <-- category sliced by value:coding.code, value:coding.system  in the specified orderOpen-->
 <category> ?? 1..1 CodeableConcept  <!-- ?? 1..1 Classification of  type of observation -->
  <coding> ?? 1..* Coding  <!-- ?? 1..* Code defined by a terminology system -->
   <system value="[uri]"/><!-- ?? 1..1 Identity of the terminology system -->
   <version value="[string]"/><!-- ?? 0..1 Version of the system - if relevant -->
   <code value="[code]"/><!-- ?? 1..1 Symbol in syntax defined by the system -->
   <display value="[string]"/><!-- ?? 0..1 Representation defined by the system -->
   <userSelected value="[boolean]"/><!-- ?? 0..1 If this coding was chosen directly by the user -->
  </coding>
  <text value="[string]"/><!-- ?? 0..1 Plain text representation of the concept -->
 </category>
 <code> ?? 1..1 CodeableConcept  <!-- ?? 1..1 Body Mass Index (BMI) -->
  <-- coding sliced by value:code, value:system  in the specified orderOpen-->
  <coding> ?? 1..1 Coding  <!-- ?? 1..1 Code defined by a terminology system -->
   <system value="[uri]"/><!-- ?? 1..1 Identity of the terminology system -->
   <version value="[string]"/><!-- ?? 0..1 Version of the system - if relevant -->
   <code value="[code]"/><!-- ?? 1..1 Symbol in syntax defined by the system -->
   <display value="[string]"/><!-- ?? 0..1 Representation defined by the system -->
   <userSelected value="[boolean]"/><!-- ?? 0..1 If this coding was chosen directly by the user -->
  </coding>
  <text value="[string]"/><!-- ?? 0..1 Plain text representation of the concept -->
 </code>
 <subject><!-- ?? 1..1 Reference(Patient) 
     Who and/or what the observation is about --></subject>
 <focus><!-- ?? 0..* Reference(Resource) 
     What the observation is about, when it is not about the subject of record --></focus>
 <encounter><!-- ?? 0..1 Reference(Encounter) 
     Healthcare event during which this observation is made --></encounter>
 <effective[x]><!-- ?? 1..1 dateTime|Period 
     Often just a dateTime for Vital Signs --></effective[x]>
 <issued value="[instant]"/><!-- ?? 0..1 Date/Time this version was made available -->
 <performer><!-- ?? 0..* Reference(Practitioner) 
     Who is responsible for the observation --></performer>
 <-- valueQuantity sliced by type:$this  in the specified orderClosed-->
 <valueQuantity> ?? 1..1 Quantity  <!-- ?? 1..1 Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. -->
  <value value="[decimal]"/><!-- ?? 1..1 Numerical value (with implicit precision) -->
  <comparator value="[code]"/><!-- ?? 0..1 < | <= | >= | > - how to understand the value   -->
  <unit value="[string]"/><!-- ?? 1..1 Unit representation -->
  <system value="[uri]"/><!-- ?? 1..1 System that defines coded unit form -->
  <code value="[code]"/><!-- ?? 1..1 Coded responses from the common UCUM units for vital signs value set. -->
 </valueQuantity>
 <dataAbsentReason><!-- ?? 0..1 CodeableConcept Why the result is missing   --></dataAbsentReason>
 <interpretation><!-- ?? 0..* CodeableConcept High, low, normal, etc.   --></interpretation>
 <note><!-- ?? 0..* Annotation Comments about the observation --></note>
 <bodySite><!-- ?? 0..1 CodeableConcept Observed body part   --></bodySite>
 <method><!-- ?? 0..1 CodeableConcept How it was done   --></method>
 <specimen><!-- ?? 0..1 Reference(Specimen) Specimen used for this observation --></specimen>
 <device><!-- ?? 0..1 Reference(Device) (Measurement) Device --></device>
 <referenceRange> ?? 0..* BackboneElement  <!-- ?? 0..* Provides guide for interpretation -->
  <modifierExtension><!-- ?? 0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
  <low><!-- ?? 0..1 Quantity 
      Low Range, if relevant --></low>
  <high><!-- ?? 0..1 Quantity 
      High Range, if relevant --></high>
  <type><!-- ?? 0..1 CodeableConcept Reference range qualifier   --></type>
  <appliesTo><!-- ?? 0..* CodeableConcept Reference range population   --></appliesTo>
  <age><!-- ?? 0..1 Range 
      Applicable age range, if relevant --></age>
  <text value="[string]"/><!-- ?? 0..1 Text based reference range in an observation -->
 </referenceRange>
 <hasMember><!-- ?? 0..* Reference(QuestionnaireResponse) 
     Used when reporting vital signs panel components --></hasMember>
 <derivedFrom><!-- ?? 0..* Reference(DocumentReference) 
     Related measurements the observation is made from --></derivedFrom>
 <component> ?? 0..* BackboneElement  <!-- ?? 0..* Used when reporting systolic and diastolic blood pressure. -->
  <modifierExtension><!-- ?? 0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
  <code><!-- ?? 1..1 CodeableConcept Type of component observation (code / type)   --></code>
  <value[x]><!-- ?? 0..1 Quantity|CodeableConcept|string|
    boolean|integer|Range|Ratio|SampledData|time|dateTime|Period Vital Sign Value recorded with UCUM   --></value[x]>
  <dataAbsentReason><!-- ?? 0..1 CodeableConcept Why the component result is missing   --></dataAbsentReason>
  <interpretation><!-- ?? 0..* CodeableConcept High, low, normal, etc.   --></interpretation>
  <referenceRange><!-- See http://hl7.org/fhir/StructureDefinition/Observation#Observation.referenceRange  Provides guide for interpretation of component result --></referenceRange>
 </component>
</Observation>

{ // observation-bmi
  // from Element: extension
    "meta" : { Meta }, // C?Metadata about the resource
    "implicitRules" : "<uri>", // C?A set of rules under which this content was created
    "language" : "<code>", // C?Language of the resource content
    "text" : { Narrative }, // C?Text summary of the resource, for human interpretation
    "contained" : [{ Resource }], // C?Contained, inline Resources
    "modifierExtension" : [{ Extension }], // C?Extensions that cannot be ignored
    "identifier" : [{ Identifier }], // C?Business Identifier for observation
    "basedOn" : [{ Reference(CarePlan) }], // C?Fulfills plan, proposal or order
    "partOf" : [{ Reference(MedicationAdministration) }], // C?Part of referenced event
    "status" : "<code>", // C? R! registered | preliminary | final | amended +
    "category" : [ //  sliced by value:coding.code, value:coding.system  in the specified order, Open 
      { // Classification of  type of observation // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "coding" : [{ Coding }], // C? R! Code defined by a terminology system
        "text" : "<string>" // C?Plain text representation of the concept
      }
    ],
    "code" : { CodeableConcept }, // C? R! Body Mass Index (BMI)
    "subject" : { Reference(Patient) }, // C? R! Who and/or what the observation is about
    "focus" : [{ Reference(Resource) }], // C?What the observation is about, when it is not about the subject of record
    "encounter" : { Reference(Encounter) }, // C?Healthcare event during which this observation is made
// value[x]: Often just a dateTime for Vital Signs. One of these 2:
    "effectiveDateTime" : "<dateTime>", // C? R! Often just a dateTime for Vital Signs
    "effectivePeriod" : { Period }, // C? R! Often just a dateTime for Vital Signs
    "issued" : "<instant>", // C?Date/Time this version was made available
    "performer" : [{ Reference(Practitioner) }], // C?Who is responsible for the observation
    "valueQuantity" : [ //  sliced by type:$this  in the specified order, Closed 
      { // Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "value" : <decimal>, // C? R! Numerical value (with implicit precision)
        "comparator" : "<code>", // C?< | <= | >= | > - how to understand the value
        "unit" : "<string>", // C? R! Unit representation
        "system" : "http://unitsofmeasure.org", // C? R! 
        "code" : "kg/m2" // C? R! 
      }
    ],
    "dataAbsentReason" : { CodeableConcept }, // C?Why the result is missing
    "interpretation" : [{ CodeableConcept }], // C?High, low, normal, etc.
    "note" : [{ Annotation }], // C?Comments about the observation
    "bodySite" : { CodeableConcept }, // C?Observed body part
    "method" : { CodeableConcept }, // C?How it was done
    "specimen" : { Reference(Specimen) }, // C?Specimen used for this observation
    "device" : { Reference(Device) }, // C?(Measurement) Device
    "referenceRange" : [{ BackboneElement }], // C?Provides guide for interpretation
    "hasMember" : [{ Reference(QuestionnaireResponse) }], // C?Used when reporting vital signs panel components
    "derivedFrom" : [{ Reference(DocumentReference) }], // C?Related measurements the observation is made from
    "component" : [{ BackboneElement }], // C?Used when reporting systolic and diastolic blood pressure.
  }

This structure is derived from observation-vitalsigns.

Summary

10.1.14.81.3 Complete Summary of the Mandatory Requirements

  1. One code in Observation.code which must have
    • a fixed Observation.code.coding.system='http ://loinc.org'
    • a fixed Observation.code.coding.code= '39156-5'
    • Other additional Codings are allowed in Observation.code- e.g. more specific LOINC Codes, SNOMED CT concepts, system specific codes. All codes SHALL have an system value
  2. Either one Observation.valueQuantity or, if there is no value, one code in Observation.DataAbsentReason
    • Each Observation.valueQuantity must have:
      • One numeric value in Observation.valueQuantity.value
      • a fixed Observation.valueQuantity.system="http://unitsofmeasure.org"
      • a UCUM unit code in Observation.valueQuantity.code = 'kg/m2'

Mandatory: 8 elements
Must-Support: 4 elements
Fixed Value: 4 elements

Slices

This structure defines the following Slices:

  • The element Observation.code.coding is sliced based on the values of value:code, value:system

Differential View

This structure is derived from observation-vitalsigns.

NameFlagsCard.TypeDescription & Constraintsdoco
.. Observation 0..*observation-vitalsignsFHIR Body Mass Index (BMI) Profile
... code 1..1CodeableConceptBody Mass Index (BMI)
.... Slices for coding 0..*CodingCode defined by a terminology system
Slice: Unordered, Open by value:code, value:system
..... coding:BMICode 1..1CodingCode defined by a terminology system
...... system 1..1uriIdentity of the terminology system
Fixed Value: http://loinc.org
...... code 1..1codeSymbol in syntax defined by the system
Fixed Value: 39156-5
... valueQuantity 1..1QuantityVital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
.... value S1..1decimalNumerical value (with implicit precision)
.... unit S1..1stringUnit representation
.... system S1..1uriSystem that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code S1..1codeCoded responses from the common UCUM units for vital signs value set.
Fixed Value: kg/m2

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraintsdoco
.. Observation I0..*observation-vitalsignsFHIR Body Mass Index (BMI) Profile
... id Σ0..1idLogical id of this artifact
... meta Σ0..1MetaMetadata about the resource
... implicitRules ?!Σ0..1uriA set of rules under which this content was created
... language 0..1codeLanguage of the resource content
Binding: Common Languages (preferred): IETF language tag

Additional BindingsPurpose
All LanguagesMax Binding
... text 0..1NarrativeText summary of the resource, for human interpretation
... contained 0..*ResourceContained, inline Resources
... extension 0..*ExtensionAdditional content defined by implementations
... modifierExtension ?!0..*ExtensionExtensions that cannot be ignored
... identifier Σ0..*IdentifierBusiness Identifier for observation
... basedOn Σ0..*Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)Fulfills plan, proposal or order
... partOf Σ0..*Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)Part of referenced event
... status ?!SΣ1..1coderegistered | preliminary | final | amended +
Binding: ObservationStatus (required)
... Slices for category S1..*CodeableConceptClassification of type of observation
Slice: Unordered, Open by value:coding.code, value:coding.system
Binding: Observation Category Codes (preferred): Codes for high level observation categories.


.... category:VSCat S1..1CodeableConceptClassification of type of observation
Binding: Observation Category Codes (preferred): Codes for high level observation categories.


..... id 0..1idUnique id for inter-element referencing
..... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
..... coding SΣ1..*CodingCode defined by a terminology system
...... id 0..1idUnique id for inter-element referencing
...... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
...... system SΣ1..1uriIdentity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
...... version Σ0..1stringVersion of the system - if relevant
...... code SΣ1..1codeSymbol in syntax defined by the system
Fixed Value: vital-signs
...... display Σ0..1stringRepresentation defined by the system
...... userSelected Σ0..1booleanIf this coding was chosen directly by the user
..... text Σ0..1stringPlain text representation of the concept
... code SΣ1..1CodeableConceptBody Mass Index (BMI)
Binding: Vital Signs (extensible): This identifies the vital sign result type. Original source C-CDA R1.1 , HITSP Vital Sign Result Type.

.... id 0..1idUnique id for inter-element referencing
.... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
.... Slices for coding Σ0..*CodingCode defined by a terminology system
Slice: Unordered, Open by value:code, value:system
..... coding:BMICode Σ1..1CodingCode defined by a terminology system
...... id 0..1idUnique id for inter-element referencing
...... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ1..1uriIdentity of the terminology system
Fixed Value: http://loinc.org
...... version Σ0..1stringVersion of the system - if relevant
...... code Σ1..1codeSymbol in syntax defined by the system
Fixed Value: 39156-5
...... display Σ0..1stringRepresentation defined by the system
...... userSelected Σ0..1booleanIf this coding was chosen directly by the user
.... text Σ0..1stringPlain text representation of the concept
... subject SΣ1..1Reference(Patient)Who and/or what the observation is about
... focus Σ0..*Reference(Resource)What the observation is about, when it is not about the subject of record
... encounter Σ0..1Reference(Encounter)Healthcare event during which this observation is made
... effective[x] SΣI1..1Often just a dateTime for Vital Signs
.... effectiveDateTimedateTime
.... effectivePeriodPeriod
... issued Σ0..1instantDate/Time this version was made available
... performer Σ0..*Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)Who is responsible for the observation
... Slices for value[x] SΣI1..1QuantityVital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
Slice: Unordered, Closed by type:$this
Binding: Vital Signs Units (extensible): Commonly encountered UCUM units for recording Vital Signs quantity units as codes. If extending this valueset the codes SHOULD come from UCUM.

.... value[x]:valueQuantity SΣI1..1QuantityVital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
Binding: Vital Signs Units (extensible): Commonly encountered UCUM units for recording Vital Signs quantity units as codes. If extending this valueset the codes SHOULD come from UCUM.

..... id 0..1idUnique id for inter-element referencing
..... extension 0..*ExtensionAdditional content defined by implementations
Slice: Unordered, Open by value:url
..... value SΣ1..1decimalNumerical value (with implicit precision)
..... comparator ?!Σ0..1code< | <= | >= | > - how to understand the value
Binding: QuantityComparator (required)
..... unit SΣ1..1stringUnit representation
..... system SΣI1..1uriSystem that defines coded unit form
Fixed Value: http://unitsofmeasure.org
..... code SΣ1..1codeCoded responses from the common UCUM units for vital signs value set.
Fixed Value: kg/m2
... dataAbsentReason SI0..1CodeableConceptWhy the result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.

... interpretation 0..*CodeableConceptHigh, low, normal, etc.
Binding: Observation Interpretation Codes (extensible): Codes identifying interpretations of observations.


... note 0..*AnnotationComments about the observation
... bodySite 0..1CodeableConceptObserved body part
Binding: SNOMED CT Body Structures (example): SNOMED CT Body site concepts

... method 0..1CodeableConceptHow it was done
Binding: Observation Methods (example): Methods for simple observations.

... specimen 0..1Reference(Specimen)Specimen used for this observation
... device 0..1Reference(Device | DeviceMetric)(Measurement) Device
... referenceRange I0..*BackboneElementProvides guide for interpretation
.... id 0..1stringUnique id for inter-element referencing
.... extension 0..*ExtensionAdditional content defined by implementations
.... modifierExtension ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
.... low I0..1SimpleQuantityLow Range, if relevant
.... high I0..1SimpleQuantityHigh Range, if relevant
.... type 0..1CodeableConceptReference range qualifier
Binding: Observation Reference Range Meaning Codes (preferred): Code for the meaning of a reference range.

.... appliesTo 0..*CodeableConceptReference range population
Binding: Observation Reference Range Applies To Codes (example): Codes identifying the population the reference range applies to.


.... age 0..1RangeApplicable age range, if relevant
.... text 0..1stringText based reference range in an observation
... hasMember Σ0..*Reference(QuestionnaireResponse | MolecularSequence | Vital Signs Profile)Used when reporting vital signs panel components
... derivedFrom Σ0..*Reference(DocumentReference | ImagingStudy | QuestionnaireResponse | MolecularSequence | Vital Signs Profile)Related measurements the observation is made from
... component SΣI0..*BackboneElementUsed when reporting systolic and diastolic blood pressure.
.... id 0..1stringUnique id for inter-element referencing
.... extension 0..*ExtensionAdditional content defined by implementations
.... modifierExtension ?!Σ0..*ExtensionExtensions that cannot be ignored even if unrecognized
.... code SΣ1..1CodeableConceptType of component observation (code / type)
Binding: Vital Signs (extensible): This identifies the vital sign result type. Original source C-CDA R1.1 , HITSP Vital Sign Result Type.

.... value[x] SΣI0..1Vital Sign Value recorded with UCUM
Binding: Vital Signs Units (extensible): Commonly encountered UCUM units for recording Vital Signs quantity units as codes. If extending this valueset the codes SHOULD come from UCUM.

..... valueQuantityQuantity
..... valueCodeableConceptCodeableConcept
..... valueStringstring
..... valueBooleanboolean
..... valueIntegerinteger
..... valueRangeRange
..... valueRatioRatio
..... valueSampledDataSampledData
..... valueTimetime
..... valueDateTimedateTime
..... valuePeriodPeriod
.... dataAbsentReason SI0..1CodeableConceptWhy the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.

.... interpretation 0..*CodeableConceptHigh, low, normal, etc.
Binding: Observation Interpretation Codes (extensible): Codes identifying interpretations of observations.


.... referenceRange 0..*See referenceRange (Observation)Provides guide for interpretation of component result

doco Documentation for this format

XML Template

<!-- observation-bmi -->doco

<Observation xmlns="http://hl7.org/fhir"
>
  <!-- from Element: extension -->
 <id value="[id]"/><!-- 0..1 Logical id of this artifact -->
 <meta><!-- ?? 0..1 Meta Metadata about the resource --></meta>
 <implicitRules value="[uri]"/><!-- ?? 0..1 A set of rules under which this content was created -->
 <language value="[code]"/><!-- ?? 0..1 Language of the resource content   -->
 <text><!-- ?? 0..1 Narrative 
     Text summary of the resource, for human interpretation --></text>
 <contained><!-- ?? 0..* Resource Contained, inline Resources --></contained>
 <modifierExtension><!-- ?? 0..* Extension  Extensions that cannot be ignored  --></modifierExtension>
 <identifier><!-- ?? 0..* Identifier 
     Business Identifier for observation --></identifier>
 <basedOn><!-- ?? 0..* Reference(CarePlan) Fulfills plan, proposal or order --></basedOn>
 <partOf><!-- ?? 0..* Reference(MedicationAdministration) Part of referenced event --></partOf>
 <status value="[code]"/><!-- ?? 1..1 registered | preliminary | final | amended +   -->
 <-- category sliced by value:coding.code, value:coding.system  in the specified orderOpen-->
 <category> ?? 1..1 CodeableConcept  <!-- ?? 1..1 Classification of  type of observation -->
  <coding> ?? 1..* Coding  <!-- ?? 1..* Code defined by a terminology system -->
   <system value="[uri]"/><!-- ?? 1..1 Identity of the terminology system -->
   <version value="[string]"/><!-- ?? 0..1 Version of the system - if relevant -->
   <code value="[code]"/><!-- ?? 1..1 Symbol in syntax defined by the system -->
   <display value="[string]"/><!-- ?? 0..1 Representation defined by the system -->
   <userSelected value="[boolean]"/><!-- ?? 0..1 If this coding was chosen directly by the user -->
  </coding>
  <text value="[string]"/><!-- ?? 0..1 Plain text representation of the concept -->
 </category>
 <code> ?? 1..1 CodeableConcept  <!-- ?? 1..1 Body Mass Index (BMI) -->
  <-- coding sliced by value:code, value:system  in the specified orderOpen-->
  <coding> ?? 1..1 Coding  <!-- ?? 1..1 Code defined by a terminology system -->
   <system value="[uri]"/><!-- ?? 1..1 Identity of the terminology system -->
   <version value="[string]"/><!-- ?? 0..1 Version of the system - if relevant -->
   <code value="[code]"/><!-- ?? 1..1 Symbol in syntax defined by the system -->
   <display value="[string]"/><!-- ?? 0..1 Representation defined by the system -->
   <userSelected value="[boolean]"/><!-- ?? 0..1 If this coding was chosen directly by the user -->
  </coding>
  <text value="[string]"/><!-- ?? 0..1 Plain text representation of the concept -->
 </code>
 <subject><!-- ?? 1..1 Reference(Patient) 
     Who and/or what the observation is about --></subject>
 <focus><!-- ?? 0..* Reference(Resource) 
     What the observation is about, when it is not about the subject of record --></focus>
 <encounter><!-- ?? 0..1 Reference(Encounter) 
     Healthcare event during which this observation is made --></encounter>
 <effective[x]><!-- ?? 1..1 dateTime|Period 
     Often just a dateTime for Vital Signs --></effective[x]>
 <issued value="[instant]"/><!-- ?? 0..1 Date/Time this version was made available -->
 <performer><!-- ?? 0..* Reference(Practitioner) 
     Who is responsible for the observation --></performer>
 <-- valueQuantity sliced by type:$this  in the specified orderClosed-->
 <valueQuantity> ?? 1..1 Quantity  <!-- ?? 1..1 Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. -->
  <value value="[decimal]"/><!-- ?? 1..1 Numerical value (with implicit precision) -->
  <comparator value="[code]"/><!-- ?? 0..1 < | <= | >= | > - how to understand the value   -->
  <unit value="[string]"/><!-- ?? 1..1 Unit representation -->
  <system value="[uri]"/><!-- ?? 1..1 System that defines coded unit form -->
  <code value="[code]"/><!-- ?? 1..1 Coded responses from the common UCUM units for vital signs value set. -->
 </valueQuantity>
 <dataAbsentReason><!-- ?? 0..1 CodeableConcept Why the result is missing   --></dataAbsentReason>
 <interpretation><!-- ?? 0..* CodeableConcept High, low, normal, etc.   --></interpretation>
 <note><!-- ?? 0..* Annotation Comments about the observation --></note>
 <bodySite><!-- ?? 0..1 CodeableConcept Observed body part   --></bodySite>
 <method><!-- ?? 0..1 CodeableConcept How it was done   --></method>
 <specimen><!-- ?? 0..1 Reference(Specimen) Specimen used for this observation --></specimen>
 <device><!-- ?? 0..1 Reference(Device) (Measurement) Device --></device>
 <referenceRange> ?? 0..* BackboneElement  <!-- ?? 0..* Provides guide for interpretation -->
  <modifierExtension><!-- ?? 0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
  <low><!-- ?? 0..1 Quantity 
      Low Range, if relevant --></low>
  <high><!-- ?? 0..1 Quantity 
      High Range, if relevant --></high>
  <type><!-- ?? 0..1 CodeableConcept Reference range qualifier   --></type>
  <appliesTo><!-- ?? 0..* CodeableConcept Reference range population   --></appliesTo>
  <age><!-- ?? 0..1 Range 
      Applicable age range, if relevant --></age>
  <text value="[string]"/><!-- ?? 0..1 Text based reference range in an observation -->
 </referenceRange>
 <hasMember><!-- ?? 0..* Reference(QuestionnaireResponse) 
     Used when reporting vital signs panel components --></hasMember>
 <derivedFrom><!-- ?? 0..* Reference(DocumentReference) 
     Related measurements the observation is made from --></derivedFrom>
 <component> ?? 0..* BackboneElement  <!-- ?? 0..* Used when reporting systolic and diastolic blood pressure. -->
  <modifierExtension><!-- ?? 0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
  <code><!-- ?? 1..1 CodeableConcept Type of component observation (code / type)   --></code>
  <value[x]><!-- ?? 0..1 Quantity|CodeableConcept|string|
    boolean|integer|Range|Ratio|SampledData|time|dateTime|Period Vital Sign Value recorded with UCUM   --></value[x]>
  <dataAbsentReason><!-- ?? 0..1 CodeableConcept Why the component result is missing   --></dataAbsentReason>
  <interpretation><!-- ?? 0..* CodeableConcept High, low, normal, etc.   --></interpretation>
  <referenceRange><!-- See http://hl7.org/fhir/StructureDefinition/Observation#Observation.referenceRange  Provides guide for interpretation of component result --></referenceRange>
 </component>
</Observation>

JSON Template

{ // observation-bmi
  // from Element: extension
    "meta" : { Meta }, // C?Metadata about the resource
    "implicitRules" : "<uri>", // C?A set of rules under which this content was created
    "language" : "<code>", // C?Language of the resource content
    "text" : { Narrative }, // C?Text summary of the resource, for human interpretation
    "contained" : [{ Resource }], // C?Contained, inline Resources
    "modifierExtension" : [{ Extension }], // C?Extensions that cannot be ignored
    "identifier" : [{ Identifier }], // C?Business Identifier for observation
    "basedOn" : [{ Reference(CarePlan) }], // C?Fulfills plan, proposal or order
    "partOf" : [{ Reference(MedicationAdministration) }], // C?Part of referenced event
    "status" : "<code>", // C? R! registered | preliminary | final | amended +
    "category" : [ //  sliced by value:coding.code, value:coding.system  in the specified order, Open 
      { // Classification of  type of observation // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "coding" : [{ Coding }], // C? R! Code defined by a terminology system
        "text" : "<string>" // C?Plain text representation of the concept
      }
    ],
    "code" : { CodeableConcept }, // C? R! Body Mass Index (BMI)
    "subject" : { Reference(Patient) }, // C? R! Who and/or what the observation is about
    "focus" : [{ Reference(Resource) }], // C?What the observation is about, when it is not about the subject of record
    "encounter" : { Reference(Encounter) }, // C?Healthcare event during which this observation is made
// value[x]: Often just a dateTime for Vital Signs. One of these 2:
    "effectiveDateTime" : "<dateTime>", // C? R! Often just a dateTime for Vital Signs
    "effectivePeriod" : { Period }, // C? R! Often just a dateTime for Vital Signs
    "issued" : "<instant>", // C?Date/Time this version was made available
    "performer" : [{ Reference(Practitioner) }], // C?Who is responsible for the observation
    "valueQuantity" : [ //  sliced by type:$this  in the specified order, Closed 
      { // Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. // C? R! 
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "value" : <decimal>, // C? R! Numerical value (with implicit precision)
        "comparator" : "<code>", // C?< | <= | >= | > - how to understand the value
        "unit" : "<string>", // C? R! Unit representation
        "system" : "http://unitsofmeasure.org", // C? R! 
        "code" : "kg/m2" // C? R! 
      }
    ],
    "dataAbsentReason" : { CodeableConcept }, // C?Why the result is missing
    "interpretation" : [{ CodeableConcept }], // C?High, low, normal, etc.
    "note" : [{ Annotation }], // C?Comments about the observation
    "bodySite" : { CodeableConcept }, // C?Observed body part
    "method" : { CodeableConcept }, // C?How it was done
    "specimen" : { Reference(Specimen) }, // C?Specimen used for this observation
    "device" : { Reference(Device) }, // C?(Measurement) Device
    "referenceRange" : [{ BackboneElement }], // C?Provides guide for interpretation
    "hasMember" : [{ Reference(QuestionnaireResponse) }], // C?Used when reporting vital signs panel components
    "derivedFrom" : [{ Reference(DocumentReference) }], // C?Related measurements the observation is made from
    "component" : [{ BackboneElement }], // C?Used when reporting systolic and diastolic blood pressure.
  }

 

Alternate definitions: Master Definition (XML, JSON), Schematron

10.1.14.81.4 Terminology Bindings

PathNameConformanceValueSet
Observation.languageCommon LanguagespreferredCommon Languages
Observation.statusObservationStatusrequiredObservationStatus
Observation.categoryObservation Category CodespreferredObservation Category Codes
Observation.categoryObservation Category CodespreferredObservation Category Codes
Observation.codeVital SignsextensibleVital Signs
Observation.value[x]Vital Signs UnitsextensibleVital Signs Units
Observation.value[x]Vital Signs UnitsextensibleVital Signs Units
Observation.value[x].comparatorQuantityComparatorrequiredQuantityComparator
Observation.dataAbsentReasonDataAbsentReasonextensibleDataAbsentReason
Observation.interpretationObservation Interpretation CodesextensibleObservation Interpretation Codes
Observation.bodySiteSNOMED CT Body StructuresexampleSNOMED CT Body Structures
Observation.methodObservation MethodsexampleObservation Methods
Observation.referenceRange.typeObservation Reference Range Meaning CodespreferredObservation Reference Range Meaning Codes
Observation.referenceRange.appliesToObservation Reference Range Applies To CodesexampleObservation Reference Range Applies To Codes
Observation.component.codeVital SignsextensibleVital Signs
Observation.component.value[x]Vital Signs UnitsextensibleVital Signs Units
Observation.component.dataAbsentReasonDataAbsentReasonextensibleDataAbsentReason
Observation.component.interpretationObservation Interpretation CodesextensibleObservation Interpretation Codes
.