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Resource Profile: ObservationHeadCircumferenceLite

Introduction

The ObservationHeadCircumference profile represents the vital parameter Head Circumference and is a profile created from the resource Observation. Head Circumference is an observation concerning the measurement around the patient's head. The profile is derived from the standard FHIR profile HeadCircumference which makes the profile compliant with the FHIR standardized way of communicating vital sign data.

Intended Use

The profile ObservationHeadCircumferenceLite is used for communicating an entry of a patient's Head Circumference, by sending a value in the element observation.value.

Read Head Circumference

• Intended use is in first hand that the API is applied for direct access and should not be used to transfer data between caregivers. If it should be used for copying inbetween care givers patient consent must be handled outside the API.

Specific Rules and Limitations

Supported Operations

Search Parameters

Supported Queries

1. GET [baseURL]/Observation/_search?patient=&code= (Search)

Error Codes

In the table below, a few error messages specific for observations are listed.

The profile ObservationHeadCircumferenceLite is used for communicating an entry of a patients head circumference by sending a value in the element observation.value. The API can be used to read patient head circumference information from COSMIC.

Usages:

• Examples for this Profile: Observation/26551

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.

• Key Elements Table
• Differential Table
• Snapshot Table
• Statistics/References
• All

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	ObservationHeadCircumferenceCore	FHIR Head Circumference Profile Constraints: obs-6, obs-7, vs-2
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
status	?!SΣ	1..1	code	registered | preliminary | final | amended + Binding: VitalSignStatus (required): The status of th result value.
Slices for category	S	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:VSCat	S	1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
coding	SΣ	1..*	Coding	Code defined by a terminology system
system	SΣ	1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
code	SΣ	1..1	code	Symbol in syntax defined by the system Fixed Value: vital-signs
code	SΣ	1..1	CodeableConcept	Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
Slices for coding	Σ	2..2	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:code, value:system
coding:HeadCircumCode	Σ	1..1	Coding	Code defined by a terminology system
system	Σ	1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
code	Σ	1..1	code	Symbol in syntax defined by the system Fixed Value: 9843-4
coding:headCircumSct	Σ	0..1	Coding	Code defined by a terminology system
system	Σ	1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code	Σ	1..1	code	Symbol in syntax defined by the system Fixed Value: 363812007
display	Σ	0..1	string	The distance around the patient's head Fixed Value: Head circumference
coding:birthHeadCircumSct	Σ	0..1	Coding	Code defined by a terminology system
system	Σ	1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code	Σ	1..1	code	Symbol in syntax defined by the system Fixed Value: 169876006
display	Σ	0..1	string	The distance around the new-born's head, Fixed Value: Birth Head Circumference
subject	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about
effective[x]	SΣC	1..1		Often just a dateTime for Vital Signs Constraints: vs-1
effectiveDateTime			dateTime
effectivePeriod			Period
Slices for performer	Σ	1..*	Reference(Practitioner | PractitionerRole | Organization | Patient)	Who is responsible for the observation Slice: Unordered, Open by type:$this
performer:patient	Σ	0..*	Reference(Patient)	Who is responsible for the observation
performer:organization	Σ	0..*	Reference(Organization)	Who is responsible for the observation
performer:practitionerRole	Σ	0..*	Reference(PractitionerRole)	Who is responsible for the observation
performer:practitioner	Σ	0..*	Reference(Practitioner)	Who is responsible for the observation
Slices for value[x]	SΣC	0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity	SΣC	0..1	Quantity	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	SΣ	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	SΣ	1..1	string	centimeters Fixed Value: cm
system	SΣC	1..1	uri	System that defines coded unit form Fixed Value: http://unitsofmeasure.org
code	SΣ	1..1	code	Coded responses from the common UCUM units for vital signs value set. Binding: BodyLengthUnits (required): Common UCUM units for body length measures such as Body Height and Head Circumference. Fixed Value: cm
dataAbsentReason	SC	0..1	CodeableConcept	Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
note		0..1	Annotation	Comments about the observation
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	VitalSignStatus https://cambio.codes/fhir/vs/vital-sign-status/v1 From this IG
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.category:VSCat	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 From the FHIR Standard
Observation.value[x]:valueQuantity.code	required	Fixed Value: cm http://hl7.org/fhir/ValueSet/ucum-bodylength|4.0.1 From the FHIR Standard
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.component.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.component.value[x]	required	VitalSignsUnits http://hl7.org/fhir/ValueSet/ucum-vitals-common|4.0.1 From the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If 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-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If 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()
vs-1	error	Observation.effective[x]	if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day : ($this as dateTime).toString().length() >= 8
vs-2	error	Observation	If there is no component or hasMember element then either a value[x] or a data absent reason must be present. : (component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())

This structure is derived from ObservationHeadCircumferenceCore

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation		0..*	ObservationHeadCircumferenceCore	FHIR Head Circumference Profile
implicitRules		0..0
language		0..0
text		0..0
contained		0..0
basedOn		0..0
partOf		0..0
status		1..1	code	registered | preliminary | final | amended + Binding: VitalSignStatus (required): The status of th result value.
code
Slices for coding		2..2	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:code, value:system
coding:headCircumSct		0..1	Coding	Code defined by a terminology system
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 363812007
display		0..1	string	The distance around the patient's head Fixed Value: Head circumference
coding:birthHeadCircumSct		0..1	Coding	Code defined by a terminology system
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 169876006
display		0..1	string	The distance around the new-born's head, Fixed Value: Birth Head Circumference
focus		0..0
issued		0..0
value[x]		0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
Slices for value[x]				Content/Rules for all slices
value[x]:valueQuantity		0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
unit		1..1	string	centimeters Fixed Value: cm
code		1..1	code	Coded responses from the common UCUM units for vital signs value set. Fixed Value: cm
dataAbsentReason
coding
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/data-absent-reason
code		1..1	code	System isn't capable of supporting this element Fixed Value: unsupported
interpretation		0..0
note		0..1	Annotation	Comments about the observation
bodySite		0..0
method		0..0
specimen		0..0
device		0..0
referenceRange		0..0
hasMember		0..0
derivedFrom		0..0
component		0..0
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.status	required	VitalSignStatus https://cambio.codes/fhir/vs/vital-sign-status/v1 From this IG

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	ObservationHeadCircumferenceCore	FHIR Head Circumference Profile Constraints: obs-6, obs-7, vs-2
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	Σ	0..*	Identifier	Business Identifier for observation
status	?!SΣ	1..1	code	registered | preliminary | final | amended + Binding: VitalSignStatus (required): The status of th result value.
Slices for category	S	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:VSCat	S	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	SΣ	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	SΣ	1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
version	Σ	0..1	string	Version of the system - if relevant
code	SΣ	1..1	code	Symbol in syntax defined by the system Fixed Value: vital-signs
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	SΣ	1..1	CodeableConcept	Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
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	2..2	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:code, value:system
coding:HeadCircumCode	Σ	1..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://loinc.org
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: 9843-4
display	Σ	0..1	string	Representation defined by the system
userSelected	Σ	0..1	boolean	If this coding was chosen directly by the user
coding:headCircumSct	Σ	0..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://snomed.info/sct
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: 363812007
display	Σ	0..1	string	The distance around the patient's head Fixed Value: Head circumference
userSelected	Σ	0..1	boolean	If this coding was chosen directly by the user
coding:birthHeadCircumSct	Σ	0..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://snomed.info/sct
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: 169876006
display	Σ	0..1	string	The distance around the new-born's head, Fixed Value: Birth Head Circumference
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	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made
effective[x]	SΣC	1..1		Often just a dateTime for Vital Signs Constraints: vs-1
effectiveDateTime			dateTime
effectivePeriod			Period
Slices for performer	Σ	1..*	Reference(Practitioner | PractitionerRole | Organization | Patient)	Who is responsible for the observation Slice: Unordered, Open by type:$this
performer:patient	Σ	0..*	Reference(Patient)	Who is responsible for the observation
performer:organization	Σ	0..*	Reference(Organization)	Who is responsible for the observation
performer:practitionerRole	Σ	0..*	Reference(PractitionerRole)	Who is responsible for the observation
performer:practitioner	Σ	0..*	Reference(Practitioner)	Who is responsible for the observation
Slices for value[x]	SΣC	0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity	SΣC	0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
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	SΣ	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	SΣ	1..1	string	centimeters Fixed Value: cm
system	SΣC	1..1	uri	System that defines coded unit form Fixed Value: http://unitsofmeasure.org
code	SΣ	1..1	code	Coded responses from the common UCUM units for vital signs value set. Binding: BodyLengthUnits (required): Common UCUM units for body length measures such as Body Height and Head Circumference. Fixed Value: cm
dataAbsentReason	SC	0..1	CodeableConcept	Why the result is missing 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
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/data-absent-reason
version	Σ	0..1	string	Version of the system - if relevant
code	Σ	1..1	code	System isn't capable of supporting this element Fixed Value: unsupported
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..1	Annotation	Comments about the observation
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	VitalSignStatus https://cambio.codes/fhir/vs/vital-sign-status/v1 From this IG
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.category:VSCat	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 From the FHIR Standard
Observation.value[x]:valueQuantity.code	required	Fixed Value: cm http://hl7.org/fhir/ValueSet/ucum-bodylength|4.0.1 From the FHIR Standard
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning From the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto From the FHIR Standard
Observation.component.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.component.value[x]	required	VitalSignsUnits http://hl7.org/fhir/ValueSet/ucum-vitals-common|4.0.1 From the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If 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-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If 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()
vs-1	error	Observation.effective[x]	if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day : ($this as dateTime).toString().length() >= 8
vs-2	error	Observation	If there is no component or hasMember element then either a value[x] or a data absent reason must be present. : (component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())

This structure is derived from ObservationHeadCircumferenceCore

Summary

Mandatory: 0 element(6 nested mandatory elements)
Fixed: 10 elements
Prohibited: 17 elements

Slices

This structure defines the following Slices:

• The element 2 is sliced based on the values of Observation.code.coding (Closed)

Key Elements View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	ObservationHeadCircumferenceCore	FHIR Head Circumference Profile Constraints: obs-6, obs-7, vs-2
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
status	?!SΣ	1..1	code	registered | preliminary | final | amended + Binding: VitalSignStatus (required): The status of th result value.
Slices for category	S	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:VSCat	S	1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
coding	SΣ	1..*	Coding	Code defined by a terminology system
system	SΣ	1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
code	SΣ	1..1	code	Symbol in syntax defined by the system Fixed Value: vital-signs
code	SΣ	1..1	CodeableConcept	Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
Slices for coding	Σ	2..2	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:code, value:system
coding:HeadCircumCode	Σ	1..1	Coding	Code defined by a terminology system
system	Σ	1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
code	Σ	1..1	code	Symbol in syntax defined by the system Fixed Value: 9843-4
coding:headCircumSct	Σ	0..1	Coding	Code defined by a terminology system
system	Σ	1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code	Σ	1..1	code	Symbol in syntax defined by the system Fixed Value: 363812007
display	Σ	0..1	string	The distance around the patient's head Fixed Value: Head circumference
coding:birthHeadCircumSct	Σ	0..1	Coding	Code defined by a terminology system
system	Σ	1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code	Σ	1..1	code	Symbol in syntax defined by the system Fixed Value: 169876006
display	Σ	0..1	string	The distance around the new-born's head, Fixed Value: Birth Head Circumference
subject	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about
effective[x]	SΣC	1..1		Often just a dateTime for Vital Signs Constraints: vs-1
effectiveDateTime			dateTime
effectivePeriod			Period
Slices for performer	Σ	1..*	Reference(Practitioner | PractitionerRole | Organization | Patient)	Who is responsible for the observation Slice: Unordered, Open by type:$this
performer:patient	Σ	0..*	Reference(Patient)	Who is responsible for the observation
performer:organization	Σ	0..*	Reference(Organization)	Who is responsible for the observation
performer:practitionerRole	Σ	0..*	Reference(PractitionerRole)	Who is responsible for the observation
performer:practitioner	Σ	0..*	Reference(Practitioner)	Who is responsible for the observation
Slices for value[x]	SΣC	0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity	SΣC	0..1	Quantity	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	SΣ	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	SΣ	1..1	string	centimeters Fixed Value: cm
system	SΣC	1..1	uri	System that defines coded unit form Fixed Value: http://unitsofmeasure.org
code	SΣ	1..1	code	Coded responses from the common UCUM units for vital signs value set. Binding: BodyLengthUnits (required): Common UCUM units for body length measures such as Body Height and Head Circumference. Fixed Value: cm
dataAbsentReason	SC	0..1	CodeableConcept	Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
note		0..1	Annotation	Comments about the observation
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	VitalSignStatus https://cambio.codes/fhir/vs/vital-sign-status/v1 From this IG
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.category:VSCat	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 From the FHIR Standard
Observation.value[x]:valueQuantity.code	required	Fixed Value: cm http://hl7.org/fhir/ValueSet/ucum-bodylength|4.0.1 From the FHIR Standard
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.component.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.component.value[x]	required	VitalSignsUnits http://hl7.org/fhir/ValueSet/ucum-vitals-common|4.0.1 From the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If 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-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If 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()
vs-1	error	Observation.effective[x]	if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day : ($this as dateTime).toString().length() >= 8
vs-2	error	Observation	If there is no component or hasMember element then either a value[x] or a data absent reason must be present. : (component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())

Differential View

This structure is derived from ObservationHeadCircumferenceCore

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation		0..*	ObservationHeadCircumferenceCore	FHIR Head Circumference Profile
implicitRules		0..0
language		0..0
text		0..0
contained		0..0
basedOn		0..0
partOf		0..0
status		1..1	code	registered | preliminary | final | amended + Binding: VitalSignStatus (required): The status of th result value.
code
Slices for coding		2..2	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:code, value:system
coding:headCircumSct		0..1	Coding	Code defined by a terminology system
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 363812007
display		0..1	string	The distance around the patient's head Fixed Value: Head circumference
coding:birthHeadCircumSct		0..1	Coding	Code defined by a terminology system
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 169876006
display		0..1	string	The distance around the new-born's head, Fixed Value: Birth Head Circumference
focus		0..0
issued		0..0
value[x]		0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
Slices for value[x]				Content/Rules for all slices
value[x]:valueQuantity		0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
unit		1..1	string	centimeters Fixed Value: cm
code		1..1	code	Coded responses from the common UCUM units for vital signs value set. Fixed Value: cm
dataAbsentReason
coding
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/data-absent-reason
code		1..1	code	System isn't capable of supporting this element Fixed Value: unsupported
interpretation		0..0
note		0..1	Annotation	Comments about the observation
bodySite		0..0
method		0..0
specimen		0..0
device		0..0
referenceRange		0..0
hasMember		0..0
derivedFrom		0..0
component		0..0
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.status	required	VitalSignStatus https://cambio.codes/fhir/vs/vital-sign-status/v1 From this IG

Snapshot View

Name	Flags	Card.	Type	Description & Constraints    Filter: Bindings Constraints Obligations
Observation	C	0..*	ObservationHeadCircumferenceCore	FHIR Head Circumference Profile Constraints: obs-6, obs-7, vs-2
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	Σ	0..*	Identifier	Business Identifier for observation
status	?!SΣ	1..1	code	registered | preliminary | final | amended + Binding: VitalSignStatus (required): The status of th result value.
Slices for category	S	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:VSCat	S	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	SΣ	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	SΣ	1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
version	Σ	0..1	string	Version of the system - if relevant
code	SΣ	1..1	code	Symbol in syntax defined by the system Fixed Value: vital-signs
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	SΣ	1..1	CodeableConcept	Head Circumference Binding: VitalSigns (extensible): This identifies the vital sign result type.
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	2..2	Coding	Code defined by a terminology system Slice: Unordered, Closed by value:code, value:system
coding:HeadCircumCode	Σ	1..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://loinc.org
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: 9843-4
display	Σ	0..1	string	Representation defined by the system
userSelected	Σ	0..1	boolean	If this coding was chosen directly by the user
coding:headCircumSct	Σ	0..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://snomed.info/sct
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: 363812007
display	Σ	0..1	string	The distance around the patient's head Fixed Value: Head circumference
userSelected	Σ	0..1	boolean	If this coding was chosen directly by the user
coding:birthHeadCircumSct	Σ	0..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://snomed.info/sct
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: 169876006
display	Σ	0..1	string	The distance around the new-born's head, Fixed Value: Birth Head Circumference
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	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made
effective[x]	SΣC	1..1		Often just a dateTime for Vital Signs Constraints: vs-1
effectiveDateTime			dateTime
effectivePeriod			Period
Slices for performer	Σ	1..*	Reference(Practitioner | PractitionerRole | Organization | Patient)	Who is responsible for the observation Slice: Unordered, Open by type:$this
performer:patient	Σ	0..*	Reference(Patient)	Who is responsible for the observation
performer:organization	Σ	0..*	Reference(Organization)	Who is responsible for the observation
performer:practitionerRole	Σ	0..*	Reference(PractitionerRole)	Who is responsible for the observation
performer:practitioner	Σ	0..*	Reference(Practitioner)	Who is responsible for the observation
Slices for value[x]	SΣC	0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept. Slice: Unordered, Closed by type:$this
value[x]:valueQuantity	SΣC	0..1	Quantity	Vital Signs value are recorded using the Quantity data type. For supporting observations such as Cuff size could use other datatypes such as CodeableConcept.
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	SΣ	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	SΣ	1..1	string	centimeters Fixed Value: cm
system	SΣC	1..1	uri	System that defines coded unit form Fixed Value: http://unitsofmeasure.org
code	SΣ	1..1	code	Coded responses from the common UCUM units for vital signs value set. Binding: BodyLengthUnits (required): Common UCUM units for body length measures such as Body Height and Head Circumference. Fixed Value: cm
dataAbsentReason	SC	0..1	CodeableConcept	Why the result is missing 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
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/data-absent-reason
version	Σ	0..1	string	Version of the system - if relevant
code	Σ	1..1	code	System isn't capable of supporting this element Fixed Value: unsupported
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..1	Annotation	Comments about the observation
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	VitalSignStatus https://cambio.codes/fhir/vs/vital-sign-status/v1 From this IG
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.category:VSCat	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category From the FHIR Standard
Observation.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 From the FHIR Standard
Observation.value[x]:valueQuantity.code	required	Fixed Value: cm http://hl7.org/fhir/ValueSet/ucum-bodylength|4.0.1 From the FHIR Standard
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning From the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto From the FHIR Standard
Observation.component.code	extensible	VitalSigns http://hl7.org/fhir/ValueSet/observation-vitalsignresult From the FHIR Standard
Observation.component.value[x]	required	VitalSignsUnits http://hl7.org/fhir/ValueSet/ucum-vitals-common|4.0.1 From the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason From the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation From the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If 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-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If 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()
vs-1	error	Observation.effective[x]	if Observation.effective[x] is dateTime and has a value then that value shall be precise to the day : ($this as dateTime).toString().length() >= 8
vs-2	error	Observation	If there is no component or hasMember element then either a value[x] or a data absent reason must be present. : (component.empty() and hasMember.empty()) implies (dataAbsentReason.exists() or value.exists())

This structure is derived from ObservationHeadCircumferenceCore

Summary

Mandatory: 0 element(6 nested mandatory elements)
Fixed: 10 elements
Prohibited: 17 elements

Slices

This structure defines the following Slices:

• The element 2 is sliced based on the values of Observation.code.coding (Closed)

Other representations of profile: CSV, Excel, Schematron