Personal Health Device Implementation Guide
2.0.0-ballot2 - STU 2 - Ballot International flag

Personal Health Device Implementation Guide, published by HL7 International / Health Care Devices. This guide is not an authorized publication; it is the continuous build for version 2.0.0-ballot2 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/phd/ and changes regularly. See the Directory of published versions

Resource Profile: PhdNumericObservation

Official URL: http://hl7.org/fhir/uv/phd/StructureDefinition/PhdNumericObservation Version: 2.0.0-ballot2
Standards status: Trial-use Maturity Level: 1 Computable Name: PhdNumericObservation

Observations from a PHD where the measurement is number

The Numeric Observation Profile is used when the PHD measurement reports a quantity. Examples are weight, body temperature, glucose concentration, pulse rate, oxygen saturation, steps take, calories burned, etc.

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Profile Content

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

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* PhdBaseObservation Simple Numeric measurement
Constraints: obs-6, obs-7
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:GatewayDevice 1..1 (Complex) Gateway Device
URL: http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice"
..... value[x] 1..1 Reference(PhgDevice) Reference to the PHG Device
.... extension:CoincidentTimeStamp 0..1 Reference(PhdCoincidentTimeStampObservation) Coincident Timestamp Reference
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/CoincidentTimeStampReference
.... extension:Accuracy 0..1 (Complex) Numeric Accuracy
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy"
..... value[x] 1..1 Quantity Value of extension
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
.... extension:Confidence95 0..1 Range Confidence95
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95
.... extension:SimpleAlerting 0..1 (Complex) SimpleAlerting
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/SimpleAlerting
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
.... identifier:conditionalCreate Σ 0..1 Identifier Unique identifier of this measurement for a given patient and device
..... use ?!Σ 0..1 code usual | official | temp | secondary | old (If known)
Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
..... system Σ 1..1 uri The namespace for the identifier value
Fixed Value: http://hl7.org/fhir/uv/phd/StructureDefinition/PhdBaseObservation
..... value Σ 1..1 string The value that is unique
Example General: 123456
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
... Slices for category 1..* CodeableConcept Classification of type of observation
Slice: Unordered, Open by value:coding.code, value:coding.system
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
.... category:PHD-Observation 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
..... coding Σ 1..* Coding Code defined by a terminology system
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://hl7.org/fhir/uv/phd/CodeSystem/PhdObservationCategories
...... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: phd
... code ΣC 1..1 CodeableConcept Type of observation (code / type)
Binding: MDC Non-Object codes (extensible)
Constraints: mdc-1
... subject Σ 1..1 Reference(Patient | PhdDevice) Reference to the patient or the PhdDevice that is the subject of the observation
... Slices for effective[x] Σ 1..1 Clinically relevant time/time-period for observation
Slice: Unordered, Closed by type:$this
.... effectiveDateTime dateTime
.... effectivePeriod Period
.... effective[x]:effectiveDateTime Σ 0..1 dateTime Clinically relevant time/time-period for observation
.... effective[x]:effectivePeriod Σ 0..1 Period Clinically relevant time/time-period for observation
... value[x] ΣC 0..1 Quantity Actual result
.... value Σ 1..1 decimal Numerical value (with implicit precision)
.... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
.... unit Σ 0..1 string Unit representation
.... system ΣC 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code Σ 1..1 code The UCUM code for the units of this measurement.
... dataAbsentReason C 0..1 CodeableConcept This element is populated for numeric observations when a special FLOAT value is reported that is not a real number.
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
... device 1..1 Reference(PhdDevice) (Measurement) Device
.... reference ΣC 1..1 string Reference to the device responsible for the measurement
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code
.... component:All Slices Content/Rules for all slices
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
.... component:supplementalTypesComponent Σ 0..* BackboneElement Supplemental Type: A further description of the measurement type.
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Required Pattern: At least the following
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version 0..1 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193
....... display 0..1 string Representation defined by the system
....... userSelected 0..1 boolean If this coding was chosen directly by the user
...... text 0..1 string Plain text representation of the concept
...... coding Σ 1..* Coding Code defined by a terminology system
....... system Σ 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Observation.extension:Accuracy.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.identifier:conditionalCreate.userequiredIdentifierUse
http://hl7.org/fhir/ValueSet/identifier-use|4.0.1
From the FHIR Standard
Observation.statusrequiredObservationStatus
http://hl7.org/fhir/ValueSet/observation-status|4.0.1
From the FHIR Standard
Observation.categorypreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.category:PHD-ObservationpreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.codeextensibleMDCnotObject
http://hl7.org/fhir/uv/phd/ValueSet/MDCnotObject
From this IG
Observation.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.dataAbsentReasonextensibleDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.component.codeexampleLOINCCodes(a valid code from LOINC)
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard
Observation.component:supplementalTypesComponent.codeexamplePattern Value: 68193
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorObservationIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorObservationIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorObservationIf 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-5errorObservationIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceObservationA resource should have narrative for robust management
: text.`div`.exists()
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
mdc-1warningObservation.codeA published MDC Code is preferred but private MDC codes are allowed as well.
: coding.exists() and coding.where(system = 'urn:iso:std:iso:11073:10101').exists()
obs-6errorObservationdataAbsentReason SHALL only be present if Observation.value[x] is not present
: dataAbsentReason.empty() or value.empty()
obs-7errorObservationIf Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
: value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from PhdBaseObservation

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation 0..* PhdBaseObservation Simple Numeric measurement
... Slices for extension Content/Rules for all slices
.... extension:Accuracy 0..1 (Complex) Numeric Accuracy
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy
..... value[x]
...... value 0..1 decimal Numerical value (with implicit precision)
.... extension:Confidence95 0..1 Range Confidence95
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95
.... extension:SimpleAlerting 0..1 (Complex) SimpleAlerting
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/SimpleAlerting
... value[x] 0..1 Quantity Actual result
.... value 1..1 decimal Numerical value (with implicit precision)
.... unit 0..1 string Unit representation
.... system 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code 1..1 code The UCUM code for the units of this measurement.
... dataAbsentReason 0..1 CodeableConcept This element is populated for numeric observations when a special FLOAT value is reported that is not a real number.

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* PhdBaseObservation Simple Numeric measurement
Constraints: obs-6, obs-7
... id Σ 0..1 id Logical id of this artifact
... meta Σ 0..1 Meta Metadata about the resource
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... versionId Σ 0..1 id Version specific identifier
.... lastUpdated Σ 0..1 instant When the resource version last changed
.... source Σ 0..1 uri Identifies where the resource comes from
.... profile Σ 0..* canonical(StructureDefinition) Profiles this resource claims to conform to
.... Slices for security Σ 0..* Coding Security Labels applied to this resource
Slice: Unordered, Open by value:system, value:code
Binding: All Security Labels (extensible): Security Labels from the Healthcare Privacy and Security Classification System.
..... security:PhdHtest Σ 0..1 Coding Security value set to HTEST when measurement status indicates demo or test data
Binding: All Security Labels (extensible): Security Labels from the Healthcare Privacy and Security Classification System.
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ActReason
...... version Σ 0..1 string Version of the system - if relevant
...... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: HTEST
...... display Σ 0..1 string Representation defined by the system
...... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
.... tag Σ 0..* Coding Tags applied to this resource
Binding: CommonTags (example): Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones".
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... language 0..1 code Language of the resource content
Binding: CommonLanguages (preferred): A human language.
Additional BindingsPurpose
AllLanguages Max Binding
... text 0..1 Narrative Text summary of the resource, for human interpretation
This profile does not constrain the narrative in regard to content, language, or traceability to data elements
... contained 0..* Resource Contained, inline Resources
... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:GatewayDevice 1..1 (Complex) Gateway Device
URL: http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice"
..... value[x] 1..1 Reference(PhgDevice) Reference to the PHG Device
.... extension:CoincidentTimeStamp 0..1 Reference(PhdCoincidentTimeStampObservation) Coincident Timestamp Reference
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/CoincidentTimeStampReference
.... extension:Accuracy 0..1 (Complex) Numeric Accuracy
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy"
..... value[x] 1..1 Quantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
...... unit Σ 0..1 string Unit representation
...... system ΣC 0..1 uri System that defines coded unit form
...... code Σ 0..1 code Coded form of the unit
.... extension:Confidence95 0..1 Range Confidence95
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95
.... extension:SimpleAlerting 0..1 (Complex) SimpleAlerting
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/SimpleAlerting
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... Slices for identifier Σ 0..* Identifier Business Identifier for observation
Slice: Unordered, Open by value:system
.... identifier:conditionalCreate Σ 0..1 Identifier Unique identifier of this measurement for a given patient and device
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... use ?!Σ 0..1 code usual | official | temp | secondary | old (If known)
Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
..... system Σ 1..1 uri The namespace for the identifier value
Fixed Value: http://hl7.org/fhir/uv/phd/StructureDefinition/PhdBaseObservation
..... value Σ 1..1 string The value that is unique
Example General: 123456
..... period Σ 0..1 Period Time period when id is/was valid for use
..... assigner Σ 0..1 Reference(Organization) Organization that issued id (may be just text)
... basedOn Σ 0..* Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) Fulfills plan, proposal or order
... partOf Σ 0..* Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) Part of referenced event
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
... Slices for category 1..* CodeableConcept Classification of type of observation
Slice: Unordered, Open by value:coding.code, value:coding.system
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
.... category:PHD-Observation 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... coding Σ 1..* Coding Code defined by a terminology system
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://hl7.org/fhir/uv/phd/CodeSystem/PhdObservationCategories
...... version Σ 0..1 string Version of the system - if relevant
...... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: phd
...... display Σ 0..1 string Representation defined by the system
...... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
..... text Σ 0..1 string Plain text representation of the concept
... code ΣC 1..1 CodeableConcept Type of observation (code / type)
Binding: MDC Non-Object codes (extensible)
Constraints: mdc-1
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..* Coding Code defined by a terminology system
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... system Σ 0..1 uri Identity of the terminology system
..... version Σ 0..1 string Version of the system - if relevant
..... code Σ 0..1 code Symbol in syntax defined by the system
..... display Σ 0..1 string Representation defined by the system
..... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
.... text Σ 0..1 string Plain text representation of the concept
... subject Σ 1..1 Reference(Patient | PhdDevice) Reference to the patient or the PhdDevice that is the subject of the observation
... focus Σ 0..* Reference(Resource) What the observation is about, when it is not about the subject of record
... encounter Σ 0..1 Reference(Encounter) Healthcare event during which this observation is made
... Slices for effective[x] Σ 1..1 Clinically relevant time/time-period for observation
Slice: Unordered, Closed by type:$this
.... effectiveDateTime dateTime
.... effectivePeriod Period
.... effective[x]:effectiveDateTime Σ 0..1 dateTime Clinically relevant time/time-period for observation
.... effective[x]:effectivePeriod Σ 0..1 Period Clinically relevant time/time-period for observation
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... start ΣC 0..1 dateTime Starting time with inclusive boundary
..... end ΣC 0..1 dateTime End time with inclusive boundary, if not ongoing
... issued Σ 0..1 instant Date/Time this version was made available
... performer Σ 0..* Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson) Who is responsible for the observation
... value[x] ΣC 0..1 Quantity Actual result
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... value Σ 1..1 decimal Numerical value (with implicit precision)
.... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
.... unit Σ 0..1 string Unit representation
.... system ΣC 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code Σ 1..1 code The UCUM code for the units of this measurement.
... dataAbsentReason C 0..1 CodeableConcept This element is populated for numeric observations when a special FLOAT value is reported that is not a real number.
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..* Coding Code defined by a terminology system
Binding: DataAbsentReason (required)
.... text Σ 0..1 string Plain text representation of the concept
... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... Slices for coding Σ 1..* Coding Code defined by a terminology system
Slice: Unordered, Open by value:system
..... coding:MsmtStatusInterpretation Σ 1..1 Coding Measurement status interpretation when questionable, calibration-ongoing, validated, early-indication, threshold exceeded, alarm inhibited
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://hl7.org/fhir/uv/pocd/CodeSystem/measurement-status
...... version Σ 0..1 string Version of the system - if relevant
...... code Σ 1..1 code Symbol in syntax defined by the system
...... display Σ 0..1 string Representation defined by the system
...... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
.... text Σ 0..1 string Plain text representation of the concept
... note 0..* Annotation Comments about the observation
... bodySite 0..1 CodeableConcept Observed body part
Binding: SNOMEDCTBodyStructures (example): Codes describing anatomical locations. May include laterality.
... method 0..1 CodeableConcept How it was done
Binding: ObservationMethods (example): Methods for simple observations.
... specimen 0..1 Reference(Specimen) Specimen used for this observation
... device 1..1 Reference(PhdDevice) (Measurement) Device
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... reference ΣC 1..1 string Reference to the device responsible for the measurement
.... type Σ 0..1 uri Type the reference refers to (e.g. "Patient")
Binding: ResourceType (extensible): Aa resource (or, for logical models, the URI of the logical model).
.... identifier Σ 0..1 Identifier Logical reference, when literal reference is not known
.... display Σ 0..1 string Text alternative for the resource
... referenceRange C 0..* BackboneElement Provides guide for interpretation
Constraints: obs-3
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
.... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
.... low C 0..1 SimpleQuantity Low Range, if relevant
.... high C 0..1 SimpleQuantity High Range, if relevant
.... type 0..1 CodeableConcept Reference range qualifier
Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
.... appliesTo 0..* CodeableConcept Reference range population
Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
.... age 0..1 Range Applicable age range, if relevant
.... text 0..1 string Text based reference range in an observation
... hasMember Σ 0..* Reference(PhdBaseObservation) Other PHD Observations that are part of this group observation.
... derivedFrom Σ 0..* Reference(PhdBaseObservation) A source the measurement data is derived from.
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code
.... component:All Slices Content/Rules for all slices
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
..... value[x] Σ 0..1 Actual component result
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... valueString string
...... valueBoolean boolean
...... valueInteger integer
...... valueRange Range
...... valueRatio Ratio
...... valueSampledData SampledData
...... valueTime time
...... valueDateTime dateTime
...... valuePeriod Period
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:supplementalTypesComponent Σ 0..* BackboneElement Supplemental Type: A further description of the measurement type.
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Required Pattern: At least the following
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version 0..1 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193
....... display 0..1 string Representation defined by the system
....... userSelected 0..1 boolean If this coding was chosen directly by the user
...... text 0..1 string Plain text representation of the concept
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... coding Σ 1..* Coding Code defined by a terminology system
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
....... system Σ 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version Σ 0..1 string Version of the system - if relevant
....... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193
....... display Σ 0..1 string Representation defined by the system
....... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
...... text Σ 0..1 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... coding Σ 0..* Coding Code defined by a terminology system
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
....... system Σ 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version Σ 0..1 string Version of the system - if relevant
....... code Σ 1..1 code Symbol in syntax defined by the system
....... display Σ 0..1 string Representation defined by the system
....... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
...... text Σ 0..1 string Plain text representation of the concept
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Observation.meta.securityextensibleAll Security Labels
http://hl7.org/fhir/ValueSet/security-labels
From the FHIR Standard
Observation.meta.security:PhdHtestextensibleFixed Value: HTEST
http://hl7.org/fhir/ValueSet/security-labels
From the FHIR Standard
Observation.meta.tagexampleCommonTags
http://hl7.org/fhir/ValueSet/common-tags
From the FHIR Standard
Observation.languagepreferredCommonLanguages
http://hl7.org/fhir/ValueSet/languages
From the FHIR Standard
Additional Bindings Purpose
AllLanguages Max Binding
Observation.extension:Accuracy.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.identifier:conditionalCreate.userequiredIdentifierUse
http://hl7.org/fhir/ValueSet/identifier-use|4.0.1
From the FHIR Standard
Observation.statusrequiredObservationStatus
http://hl7.org/fhir/ValueSet/observation-status|4.0.1
From the FHIR Standard
Observation.categorypreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.category:PHD-ObservationpreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.codeextensibleMDCnotObject
http://hl7.org/fhir/uv/phd/ValueSet/MDCnotObject
From this IG
Observation.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.dataAbsentReasonextensibleDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.dataAbsentReason.codingrequiredDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.interpretationextensibleObservationInterpretationCodes
http://hl7.org/fhir/ValueSet/observation-interpretation
From the FHIR Standard
Observation.bodySiteexampleSNOMEDCTBodyStructures
http://hl7.org/fhir/ValueSet/body-site
From the FHIR Standard
Observation.methodexampleObservationMethods
http://hl7.org/fhir/ValueSet/observation-methods
From the FHIR Standard
Observation.device.typeextensibleResourceType
http://hl7.org/fhir/ValueSet/resource-types
From the FHIR Standard
Observation.referenceRange.typepreferredObservationReferenceRangeMeaningCodes
http://hl7.org/fhir/ValueSet/referencerange-meaning
From the FHIR Standard
Observation.referenceRange.appliesToexampleObservationReferenceRangeAppliesToCodes
http://hl7.org/fhir/ValueSet/referencerange-appliesto
From the FHIR Standard
Observation.component.codeexampleLOINCCodes(a valid code from LOINC)
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard
Observation.component.dataAbsentReasonextensibleDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.component.interpretationextensibleObservationInterpretationCodes
http://hl7.org/fhir/ValueSet/observation-interpretation
From the FHIR Standard
Observation.component:supplementalTypesComponent.codeexamplePattern Value: 68193
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard
Observation.component:supplementalTypesComponent.interpretationextensibleObservationInterpretationCodes
http://hl7.org/fhir/ValueSet/observation-interpretation
From the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorObservationIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorObservationIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorObservationIf 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-5errorObservationIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceObservationA resource should have narrative for robust management
: text.`div`.exists()
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
mdc-1warningObservation.codeA published MDC Code is preferred but private MDC codes are allowed as well.
: coding.exists() and coding.where(system = 'urn:iso:std:iso:11073:10101').exists()
obs-3errorObservation.referenceRangeMust have at least a low or a high or text
: low.exists() or high.exists() or text.exists()
obs-6errorObservationdataAbsentReason SHALL only be present if Observation.value[x] is not present
: dataAbsentReason.empty() or value.empty()
obs-7errorObservationIf Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
: value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from PhdBaseObservation

Summary

Mandatory: 0 element(3 nested mandatory elements)
Fixed: 1 element

Extensions

This structure refers to these extensions:

Maturity: 1

Key Elements View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* PhdBaseObservation Simple Numeric measurement
Constraints: obs-6, obs-7
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:GatewayDevice 1..1 (Complex) Gateway Device
URL: http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice"
..... value[x] 1..1 Reference(PhgDevice) Reference to the PHG Device
.... extension:CoincidentTimeStamp 0..1 Reference(PhdCoincidentTimeStampObservation) Coincident Timestamp Reference
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/CoincidentTimeStampReference
.... extension:Accuracy 0..1 (Complex) Numeric Accuracy
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy"
..... value[x] 1..1 Quantity Value of extension
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
.... extension:Confidence95 0..1 Range Confidence95
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95
.... extension:SimpleAlerting 0..1 (Complex) SimpleAlerting
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/SimpleAlerting
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
.... identifier:conditionalCreate Σ 0..1 Identifier Unique identifier of this measurement for a given patient and device
..... use ?!Σ 0..1 code usual | official | temp | secondary | old (If known)
Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
..... system Σ 1..1 uri The namespace for the identifier value
Fixed Value: http://hl7.org/fhir/uv/phd/StructureDefinition/PhdBaseObservation
..... value Σ 1..1 string The value that is unique
Example General: 123456
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
... Slices for category 1..* CodeableConcept Classification of type of observation
Slice: Unordered, Open by value:coding.code, value:coding.system
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
.... category:PHD-Observation 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
..... coding Σ 1..* Coding Code defined by a terminology system
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://hl7.org/fhir/uv/phd/CodeSystem/PhdObservationCategories
...... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: phd
... code ΣC 1..1 CodeableConcept Type of observation (code / type)
Binding: MDC Non-Object codes (extensible)
Constraints: mdc-1
... subject Σ 1..1 Reference(Patient | PhdDevice) Reference to the patient or the PhdDevice that is the subject of the observation
... Slices for effective[x] Σ 1..1 Clinically relevant time/time-period for observation
Slice: Unordered, Closed by type:$this
.... effectiveDateTime dateTime
.... effectivePeriod Period
.... effective[x]:effectiveDateTime Σ 0..1 dateTime Clinically relevant time/time-period for observation
.... effective[x]:effectivePeriod Σ 0..1 Period Clinically relevant time/time-period for observation
... value[x] ΣC 0..1 Quantity Actual result
.... value Σ 1..1 decimal Numerical value (with implicit precision)
.... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
.... unit Σ 0..1 string Unit representation
.... system ΣC 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code Σ 1..1 code The UCUM code for the units of this measurement.
... dataAbsentReason C 0..1 CodeableConcept This element is populated for numeric observations when a special FLOAT value is reported that is not a real number.
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
... device 1..1 Reference(PhdDevice) (Measurement) Device
.... reference ΣC 1..1 string Reference to the device responsible for the measurement
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code
.... component:All Slices Content/Rules for all slices
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
.... component:supplementalTypesComponent Σ 0..* BackboneElement Supplemental Type: A further description of the measurement type.
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Required Pattern: At least the following
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version 0..1 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193
....... display 0..1 string Representation defined by the system
....... userSelected 0..1 boolean If this coding was chosen directly by the user
...... text 0..1 string Plain text representation of the concept
...... coding Σ 1..* Coding Code defined by a terminology system
....... system Σ 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Observation.extension:Accuracy.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.identifier:conditionalCreate.userequiredIdentifierUse
http://hl7.org/fhir/ValueSet/identifier-use|4.0.1
From the FHIR Standard
Observation.statusrequiredObservationStatus
http://hl7.org/fhir/ValueSet/observation-status|4.0.1
From the FHIR Standard
Observation.categorypreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.category:PHD-ObservationpreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.codeextensibleMDCnotObject
http://hl7.org/fhir/uv/phd/ValueSet/MDCnotObject
From this IG
Observation.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.dataAbsentReasonextensibleDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.component.codeexampleLOINCCodes(a valid code from LOINC)
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard
Observation.component:supplementalTypesComponent.codeexamplePattern Value: 68193
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorObservationIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorObservationIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorObservationIf 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-5errorObservationIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceObservationA resource should have narrative for robust management
: text.`div`.exists()
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
mdc-1warningObservation.codeA published MDC Code is preferred but private MDC codes are allowed as well.
: coding.exists() and coding.where(system = 'urn:iso:std:iso:11073:10101').exists()
obs-6errorObservationdataAbsentReason SHALL only be present if Observation.value[x] is not present
: dataAbsentReason.empty() or value.empty()
obs-7errorObservationIf Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
: value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Differential View

This structure is derived from PhdBaseObservation

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation 0..* PhdBaseObservation Simple Numeric measurement
... Slices for extension Content/Rules for all slices
.... extension:Accuracy 0..1 (Complex) Numeric Accuracy
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy
..... value[x]
...... value 0..1 decimal Numerical value (with implicit precision)
.... extension:Confidence95 0..1 Range Confidence95
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95
.... extension:SimpleAlerting 0..1 (Complex) SimpleAlerting
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/SimpleAlerting
... value[x] 0..1 Quantity Actual result
.... value 1..1 decimal Numerical value (with implicit precision)
.... unit 0..1 string Unit representation
.... system 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code 1..1 code The UCUM code for the units of this measurement.
... dataAbsentReason 0..1 CodeableConcept This element is populated for numeric observations when a special FLOAT value is reported that is not a real number.

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Observation C 0..* PhdBaseObservation Simple Numeric measurement
Constraints: obs-6, obs-7
... id Σ 0..1 id Logical id of this artifact
... meta Σ 0..1 Meta Metadata about the resource
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... versionId Σ 0..1 id Version specific identifier
.... lastUpdated Σ 0..1 instant When the resource version last changed
.... source Σ 0..1 uri Identifies where the resource comes from
.... profile Σ 0..* canonical(StructureDefinition) Profiles this resource claims to conform to
.... Slices for security Σ 0..* Coding Security Labels applied to this resource
Slice: Unordered, Open by value:system, value:code
Binding: All Security Labels (extensible): Security Labels from the Healthcare Privacy and Security Classification System.
..... security:PhdHtest Σ 0..1 Coding Security value set to HTEST when measurement status indicates demo or test data
Binding: All Security Labels (extensible): Security Labels from the Healthcare Privacy and Security Classification System.
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://terminology.hl7.org/CodeSystem/v3-ActReason
...... version Σ 0..1 string Version of the system - if relevant
...... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: HTEST
...... display Σ 0..1 string Representation defined by the system
...... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
.... tag Σ 0..* Coding Tags applied to this resource
Binding: CommonTags (example): Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones".
... implicitRules ?!Σ 0..1 uri A set of rules under which this content was created
... language 0..1 code Language of the resource content
Binding: CommonLanguages (preferred): A human language.
Additional BindingsPurpose
AllLanguages Max Binding
... text 0..1 Narrative Text summary of the resource, for human interpretation
This profile does not constrain the narrative in regard to content, language, or traceability to data elements
... contained 0..* Resource Contained, inline Resources
... Slices for extension 1..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:GatewayDevice 1..1 (Complex) Gateway Device
URL: http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice"
..... value[x] 1..1 Reference(PhgDevice) Reference to the PHG Device
.... extension:CoincidentTimeStamp 0..1 Reference(PhdCoincidentTimeStampObservation) Coincident Timestamp Reference
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/CoincidentTimeStampReference
.... extension:Accuracy 0..1 (Complex) Numeric Accuracy
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0
..... url 1..1 uri "http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy"
..... value[x] 1..1 Quantity Value of extension
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... value Σ 0..1 decimal Numerical value (with implicit precision)
...... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
...... unit Σ 0..1 string Unit representation
...... system ΣC 0..1 uri System that defines coded unit form
...... code Σ 0..1 code Coded form of the unit
.... extension:Confidence95 0..1 Range Confidence95
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95
.... extension:SimpleAlerting 0..1 (Complex) SimpleAlerting
URL: http://hl7.org/fhir/uv/phd/StructureDefinition/SimpleAlerting
... modifierExtension ?! 0..* Extension Extensions that cannot be ignored
... Slices for identifier Σ 0..* Identifier Business Identifier for observation
Slice: Unordered, Open by value:system
.... identifier:conditionalCreate Σ 0..1 Identifier Unique identifier of this measurement for a given patient and device
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... use ?!Σ 0..1 code usual | official | temp | secondary | old (If known)
Binding: IdentifierUse (required): Identifies the purpose for this identifier, if known .
..... system Σ 1..1 uri The namespace for the identifier value
Fixed Value: http://hl7.org/fhir/uv/phd/StructureDefinition/PhdBaseObservation
..... value Σ 1..1 string The value that is unique
Example General: 123456
..... period Σ 0..1 Period Time period when id is/was valid for use
..... assigner Σ 0..1 Reference(Organization) Organization that issued id (may be just text)
... basedOn Σ 0..* Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest) Fulfills plan, proposal or order
... partOf Σ 0..* Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy) Part of referenced event
... status ?!Σ 1..1 code registered | preliminary | final | amended +
Binding: ObservationStatus (required): Codes providing the status of an observation.
... Slices for category 1..* CodeableConcept Classification of type of observation
Slice: Unordered, Open by value:coding.code, value:coding.system
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
.... category:PHD-Observation 1..1 CodeableConcept Classification of type of observation
Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... coding Σ 1..* Coding Code defined by a terminology system
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://hl7.org/fhir/uv/phd/CodeSystem/PhdObservationCategories
...... version Σ 0..1 string Version of the system - if relevant
...... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: phd
...... display Σ 0..1 string Representation defined by the system
...... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
..... text Σ 0..1 string Plain text representation of the concept
... code ΣC 1..1 CodeableConcept Type of observation (code / type)
Binding: MDC Non-Object codes (extensible)
Constraints: mdc-1
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..* Coding Code defined by a terminology system
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... system Σ 0..1 uri Identity of the terminology system
..... version Σ 0..1 string Version of the system - if relevant
..... code Σ 0..1 code Symbol in syntax defined by the system
..... display Σ 0..1 string Representation defined by the system
..... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
.... text Σ 0..1 string Plain text representation of the concept
... subject Σ 1..1 Reference(Patient | PhdDevice) Reference to the patient or the PhdDevice that is the subject of the observation
... focus Σ 0..* Reference(Resource) What the observation is about, when it is not about the subject of record
... encounter Σ 0..1 Reference(Encounter) Healthcare event during which this observation is made
... Slices for effective[x] Σ 1..1 Clinically relevant time/time-period for observation
Slice: Unordered, Closed by type:$this
.... effectiveDateTime dateTime
.... effectivePeriod Period
.... effective[x]:effectiveDateTime Σ 0..1 dateTime Clinically relevant time/time-period for observation
.... effective[x]:effectivePeriod Σ 0..1 Period Clinically relevant time/time-period for observation
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
..... start ΣC 0..1 dateTime Starting time with inclusive boundary
..... end ΣC 0..1 dateTime End time with inclusive boundary, if not ongoing
... issued Σ 0..1 instant Date/Time this version was made available
... performer Σ 0..* Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson) Who is responsible for the observation
... value[x] ΣC 0..1 Quantity Actual result
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... value Σ 1..1 decimal Numerical value (with implicit precision)
.... comparator ?!Σ 0..1 code < | <= | >= | > - how to understand the value
Binding: QuantityComparator (required): How the Quantity should be understood and represented.
.... unit Σ 0..1 string Unit representation
.... system ΣC 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
.... code Σ 1..1 code The UCUM code for the units of this measurement.
... dataAbsentReason C 0..1 CodeableConcept This element is populated for numeric observations when a special FLOAT value is reported that is not a real number.
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... coding Σ 0..* Coding Code defined by a terminology system
Binding: DataAbsentReason (required)
.... text Σ 0..1 string Plain text representation of the concept
... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... Slices for coding Σ 1..* Coding Code defined by a terminology system
Slice: Unordered, Open by value:system
..... coding:MsmtStatusInterpretation Σ 1..1 Coding Measurement status interpretation when questionable, calibration-ongoing, validated, early-indication, threshold exceeded, alarm inhibited
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... system Σ 1..1 uri Identity of the terminology system
Fixed Value: http://hl7.org/fhir/uv/pocd/CodeSystem/measurement-status
...... version Σ 0..1 string Version of the system - if relevant
...... code Σ 1..1 code Symbol in syntax defined by the system
...... display Σ 0..1 string Representation defined by the system
...... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
.... text Σ 0..1 string Plain text representation of the concept
... note 0..* Annotation Comments about the observation
... bodySite 0..1 CodeableConcept Observed body part
Binding: SNOMEDCTBodyStructures (example): Codes describing anatomical locations. May include laterality.
... method 0..1 CodeableConcept How it was done
Binding: ObservationMethods (example): Methods for simple observations.
... specimen 0..1 Reference(Specimen) Specimen used for this observation
... device 1..1 Reference(PhdDevice) (Measurement) Device
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
.... reference ΣC 1..1 string Reference to the device responsible for the measurement
.... type Σ 0..1 uri Type the reference refers to (e.g. "Patient")
Binding: ResourceType (extensible): Aa resource (or, for logical models, the URI of the logical model).
.... identifier Σ 0..1 Identifier Logical reference, when literal reference is not known
.... display Σ 0..1 string Text alternative for the resource
... referenceRange C 0..* BackboneElement Provides guide for interpretation
Constraints: obs-3
.... id 0..1 string Unique id for inter-element referencing
.... extension 0..* Extension Additional content defined by implementations
.... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
.... low C 0..1 SimpleQuantity Low Range, if relevant
.... high C 0..1 SimpleQuantity High Range, if relevant
.... type 0..1 CodeableConcept Reference range qualifier
Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
.... appliesTo 0..* CodeableConcept Reference range population
Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
.... age 0..1 Range Applicable age range, if relevant
.... text 0..1 string Text based reference range in an observation
... hasMember Σ 0..* Reference(PhdBaseObservation) Other PHD Observations that are part of this group observation.
... derivedFrom Σ 0..* Reference(PhdBaseObservation) A source the measurement data is derived from.
... Slices for component Σ 0..* BackboneElement Component results
Slice: Unordered, Open by value:code
.... component:All Slices Content/Rules for all slices
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
..... value[x] Σ 0..1 Actual component result
...... valueQuantity Quantity
...... valueCodeableConcept CodeableConcept
...... valueString string
...... valueBoolean boolean
...... valueInteger integer
...... valueRange Range
...... valueRatio Ratio
...... valueSampledData SampledData
...... valueTime time
...... valueDateTime dateTime
...... valuePeriod Period
..... dataAbsentReason C 0..1 CodeableConcept Why the component result is missing
Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result
.... component:supplementalTypesComponent Σ 0..* BackboneElement Supplemental Type: A further description of the measurement type.
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..* Extension Additional content defined by implementations
..... modifierExtension ?!Σ 0..* Extension Extensions that cannot be ignored even if unrecognized
..... code Σ 1..1 CodeableConcept Type of component observation (code / type)
Binding: LOINCCodes (example): Codes identifying names of simple observations.
Required Pattern: At least the following
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
...... coding 1..* Coding Code defined by a terminology system
Fixed Value: (Complex)
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
....... system 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version 0..1 string Version of the system - if relevant
....... code 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193
....... display 0..1 string Representation defined by the system
....... userSelected 0..1 boolean If this coding was chosen directly by the user
...... text 0..1 string Plain text representation of the concept
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... coding Σ 1..* Coding Code defined by a terminology system
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
....... system Σ 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version Σ 0..1 string Version of the system - if relevant
....... code Σ 1..1 code Symbol in syntax defined by the system
Fixed Value: 68193
....... display Σ 0..1 string Representation defined by the system
....... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
...... text Σ 0..1 string Plain text representation of the concept
..... value[x] Σ 0..1 CodeableConcept Actual component result
...... id 0..1 string Unique id for inter-element referencing
...... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
...... coding Σ 0..* Coding Code defined by a terminology system
....... id 0..1 string Unique id for inter-element referencing
....... extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
....... system Σ 1..1 uri Identity of the terminology system
Fixed Value: urn:iso:std:iso:11073:10101
....... version Σ 0..1 string Version of the system - if relevant
....... code Σ 1..1 code Symbol in syntax defined by the system
....... display Σ 0..1 string Representation defined by the system
....... userSelected Σ 0..1 boolean If this coding was chosen directly by the user
...... text Σ 0..1 string Plain text representation of the concept
..... interpretation 0..* CodeableConcept High, low, normal, etc.
Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
..... referenceRange 0..* See referenceRange (Observation) Provides guide for interpretation of component result

doco Documentation for this format

Terminology Bindings

PathConformanceValueSet / CodeURI
Observation.meta.securityextensibleAll Security Labels
http://hl7.org/fhir/ValueSet/security-labels
From the FHIR Standard
Observation.meta.security:PhdHtestextensibleFixed Value: HTEST
http://hl7.org/fhir/ValueSet/security-labels
From the FHIR Standard
Observation.meta.tagexampleCommonTags
http://hl7.org/fhir/ValueSet/common-tags
From the FHIR Standard
Observation.languagepreferredCommonLanguages
http://hl7.org/fhir/ValueSet/languages
From the FHIR Standard
Additional Bindings Purpose
AllLanguages Max Binding
Observation.extension:Accuracy.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.identifier:conditionalCreate.userequiredIdentifierUse
http://hl7.org/fhir/ValueSet/identifier-use|4.0.1
From the FHIR Standard
Observation.statusrequiredObservationStatus
http://hl7.org/fhir/ValueSet/observation-status|4.0.1
From the FHIR Standard
Observation.categorypreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.category:PHD-ObservationpreferredObservationCategoryCodes
http://hl7.org/fhir/ValueSet/observation-category
From the FHIR Standard
Observation.codeextensibleMDCnotObject
http://hl7.org/fhir/uv/phd/ValueSet/MDCnotObject
From this IG
Observation.value[x].comparatorrequiredQuantityComparator
http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1
From the FHIR Standard
Observation.dataAbsentReasonextensibleDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.dataAbsentReason.codingrequiredDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.interpretationextensibleObservationInterpretationCodes
http://hl7.org/fhir/ValueSet/observation-interpretation
From the FHIR Standard
Observation.bodySiteexampleSNOMEDCTBodyStructures
http://hl7.org/fhir/ValueSet/body-site
From the FHIR Standard
Observation.methodexampleObservationMethods
http://hl7.org/fhir/ValueSet/observation-methods
From the FHIR Standard
Observation.device.typeextensibleResourceType
http://hl7.org/fhir/ValueSet/resource-types
From the FHIR Standard
Observation.referenceRange.typepreferredObservationReferenceRangeMeaningCodes
http://hl7.org/fhir/ValueSet/referencerange-meaning
From the FHIR Standard
Observation.referenceRange.appliesToexampleObservationReferenceRangeAppliesToCodes
http://hl7.org/fhir/ValueSet/referencerange-appliesto
From the FHIR Standard
Observation.component.codeexampleLOINCCodes(a valid code from LOINC)
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard
Observation.component.dataAbsentReasonextensibleDataAbsentReason
http://hl7.org/fhir/ValueSet/data-absent-reason
From the FHIR Standard
Observation.component.interpretationextensibleObservationInterpretationCodes
http://hl7.org/fhir/ValueSet/observation-interpretation
From the FHIR Standard
Observation.component:supplementalTypesComponent.codeexamplePattern Value: 68193
http://hl7.org/fhir/ValueSet/observation-codes
From the FHIR Standard
Observation.component:supplementalTypesComponent.interpretationextensibleObservationInterpretationCodes
http://hl7.org/fhir/ValueSet/observation-interpretation
From the FHIR Standard

Constraints

IdGradePath(s)DetailsRequirements
dom-2errorObservationIf the resource is contained in another resource, it SHALL NOT contain nested Resources
: contained.contained.empty()
dom-3errorObservationIf the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource
: contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4errorObservationIf 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-5errorObservationIf a resource is contained in another resource, it SHALL NOT have a security label
: contained.meta.security.empty()
dom-6best practiceObservationA resource should have narrative for robust management
: text.`div`.exists()
ele-1error**ALL** elementsAll FHIR elements must have a @value or children
: hasValue() or (children().count() > id.count())
ext-1error**ALL** extensionsMust have either extensions or value[x], not both
: extension.exists() != value.exists()
mdc-1warningObservation.codeA published MDC Code is preferred but private MDC codes are allowed as well.
: coding.exists() and coding.where(system = 'urn:iso:std:iso:11073:10101').exists()
obs-3errorObservation.referenceRangeMust have at least a low or a high or text
: low.exists() or high.exists() or text.exists()
obs-6errorObservationdataAbsentReason SHALL only be present if Observation.value[x] is not present
: dataAbsentReason.empty() or value.empty()
obs-7errorObservationIf Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present
: value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from PhdBaseObservation

Summary

Mandatory: 0 element(3 nested mandatory elements)
Fixed: 1 element

Extensions

This structure refers to these extensions:

Maturity: 1

 

Other representations of profile: CSV, Excel, Schematron

Notes:

This profile is used to map ACOM Numeric Observations. The measured value is reported as a floating number with an optional accuracy. In GHS the value is encoded as an IEEE 11073 FLOAT that indicates both precision and the number of significant digits. The Observation.valueQuantity.value element is required to honor the reported precision. See FLOATs and SFLOATs for instructions on handling S/FLOATs and their encoding to the valueQuantity .

Mapping the unit code to FHIR

The MDC unit code as provided by the PHD needs to be mapped to UCUM. See MDC Nomenclature Codes for more details.

Additional Numerical Measurement Information

IEEE 11073-10206 numeric observations have some additional optional attributes that are used only for numerics and provide further information about the measurement. These optional attributes are seldom used directly by PHDs and are mapped to FHIR extensions.

Accuracy

The Accuracy attribute gives the maximum deviation as an absolute value of the reported measurement from the actual measurement. It shall be reported if the PHD provides it. When static it can be reported as an extension in a Device Metric, otherwise it is reported as an extension of an Observation. See Accuracy extension. The accuracy is reported in the same unit as the measurement itself. An example of an accuracy entry for a thermometer is shown below:

{
  "resourceType" : "Observation",
  ...
  "extension" : [
    ...
    {
      "url" : "http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy",
      "valueQuantity" : {
        "value" : 0.1,
        "system" : "http://unitsofmeasure.org",
        "code" : "Cel"
      }
    }
  ],
  ...
}
Simple Alerting

The simple alerting extension supports monitoring a numerical value (quantities in FHIR) and provisioning of an alarm if the value is outside a defined threshold or limiting range. The extension includes the range, the operational state of the monitoring and text strings describing these. See Simple Alerting. The PHD pulse oximeter and the continuous glucose monitor specialization support this. The extension defines a current limits range for the quantity, an operational state and optional strings for the operational state and the semantics of the quantity being outside the range.

This mechanism is used in combination with the Observation.interpretation value being set to "in-alarm" when the quantity is outside the limits.

The presence of the extension in an Observation with a numeric quantity informs the consumer of the use of the alerting mechanism.

An example of an observation with an alert can be found here.

Measurement Confidence 95

The Measurement-Confidence-95 gives a lower and upper bound with which the manufacturer is 95% confident that the actual reported measurement is within that bounds. The Measurement Confidence 95 applies only to measurement values that are quantities. It is supported by the IEEE 11073-20601 specification, but not by the IEEE 11073-10206 ACOM specification. It shall be reported if the PHD provides it. When static it can be reported as an extension in a Device Metric, otherwise it is reported as an extension of an Observation. See Confidence95 extension. The range is encoded in an Extension.valueRange element. The ranges have the same units as the primary measurement. The IEEE 11073-20601 Measurement-Confidence-95 component is currently used only in the Continuous Glucose specialization. An example of a Measurement Confidence 95 entry is shown below:

{
  "resourceType" : "Observation",
  ...
  "extension" : [
    ...
    {
      "url" : "http://hl7.org/fhir/uv/phd/StructureDefinition/Confidence95",
      "valueRange" : {
        "low" : {
          "value" : 98,
          "unit" : "mg/dL",
          "system" : "http://unitsofmeasure.org",
          "code" : "mg/dL"
        },
        "high" : {
          "value" : 100,
          "unit" : "mg/dL",
          "system" : "http://unitsofmeasure.org",
          "code" : "mg/dL"
        }
      }
    }
  ],
  ...
}

The above states that the Continuous Glucose Monitor PHG is 95% sure that the reported measurement of (say 99 mg/dL) lies between 98 and 100 mg/dL.

Examples:

A basic simple numeric observation with a timestamp and a supplemental types attribute is shown in Pulse Rate Spot Measurement. Simple numeric measurements are common in PHDs.

An example of a NaN (not a number) measurement is shown in NaN Example. Note that the value element is absent and replaced by a dataAbsentReason element.

Consumer of the PHD Numeric Observation Profile

The consumer of this profile does not need to concern itself with the complexities or the PHD-related entry for the Observation.identifier which is used by the uploader to prevent data duplication. There are some extensions introduced by this profile but the resource is consumable by any reader that understands the Observation resource. The following table summarizes the elements used describing the measurement:

Measurement Item Element Additional Information
Measurement type Observation.code.coding.code There shall be one coding element using the MDC coding system.
If a vital sign, there will be an additional coding element using one of the LOINC vital-signs codes.
Measurement value Observation.valueQuantity.value The value has the precision of the original. measurement.
Measurement units Observation.valueQuantity.code FHIR uses the UCUM coding system.
Error Observation.dataAbsentReason Contains error code. If present, no Observation.valueQuantity is present.
Timestamp Observation.effectiveDateTime
Observation.effectivePeriod		 If the measurement is a point in time.
If the measurement has a duration.
Coincident timestamp reference Observation.extension.valueReference Points to an Observation following the Coincident Timestamp Observation profile. For time quality auditing purposes. Not present if the sensor provides no timestamp.
Related measurement Observation.derivedFrom Points to PHD Observations that are related to this Observation, such as a height observation related to a BMI measurement. Not present if the observation did not reference other observations it is derived from.
Related measurement Observation.memberOf Points to a PHD Observation that reports a group of related Observations, such as a cardio session. Not present if the observation is not a member of a group of related measurements.
Additional descriptions Observation.extension.* When present it contains additional information about the measurement.
Patient Observation.subject Points to the Patient resource.
Sensor device Observation.device Points to the Device resource.