Observation | Medplum
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Measurements and simple assertions made about a patient, device or other subject. US Core Profiles related to Observations are as follows:
- US Core Laboratory Result profile
- US Core Smoking Status Observation profile.
- US Core Pulse Oximetry Profile
- US Core Pediatric BMI for Age Profile
- US Core Pediatric Weight for Height
- US Core Pediatric Head Circumference
- US Core Observation Survey
- US Core Observation Social History
- US Core Clinical Test Result
- US Core Observation Sexual Orientation
Elements
| Name | Required | Type | Description |
|---|---|---|---|
| identifier | Identifier[] | Business Identifier for observation Details A unique identifier assigned to this observation. |
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| basedOn | Reference< CarePlan |
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| partOf | Reference< MedicationAdministration |
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| status | ✓ | code | registered |
| category | CodeableConcept[] | Classification of type of observation Details A code that classifies the general type of observation being made. |
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| code | ✓ | CodeableConcept | Type of observation (code / type) Details Describes what was observed. Sometimes this is called the observation "name". |
| subject | Reference< Patient |
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| focus | Reference |
What the observation is about, when it is not about the subject of record Details The actual focus of an observation when it is not the patient of record representing something or someone associated with the patient such as a spouse, parent, fetus, or donor. |
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| encounter | Reference< Encounter > | Healthcare event during which this observation is made Details The healthcare event (e.g. a patient and healthcare provider interaction) during which this observation is made. |
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| effective[x] | dateTime, Period, Timing, instant | Clinically relevant time/time-period for observation Details The time or time-period the observed value is asserted as being true. |
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| issued | instant | Date/Time this version was made available Details The date and time this version of the observation was made available to providers. |
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| performer | Reference< Practitioner |
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| value[x] | Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, SampledData, time, dateTime, Period | Actual result Details The information determined as a result of making the observation. |
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| dataAbsentReason | CodeableConcept | Why the result is missing Details Provides a reason why the expected value in the element Observation.value[x] is missing. |
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| interpretation | CodeableConcept[] | High, low, normal, etc. Details A categorical assessment of an observation value. |
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| note | Annotation[] | Comments about the observation Details Comments about the observation or the results. |
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| bodySite | CodeableConcept | Observed body part Details Indicates the site on the subject's body where the observation was made. |
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| method | CodeableConcept | How it was done Details Indicates the mechanism used to perform the observation. |
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| specimen | Reference< Specimen > | Specimen used for this observation Details The specimen that was used when this observation was made. |
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| device | Reference< Device | ||
| referenceRange | ObservationReferenceRange[] | Provides guide for interpretation Details Guidance on how to interpret the value by comparison to a normal or recommended range. |
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| id | string | Unique id for inter-element referencing Details Unique id for the element within a resource. |
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| extension | Extension[] | Additional content defined by implementations Details May be used to represent additional information that is not part of the basic definition of the element. |
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| modifierExtension | Extension[] | Extensions that cannot be ignored even if unrecognized Details May be used to represent additional information that is not part of the basic definition of the element. |
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| low | Quantity | Low Range, if relevant Details The value of the low bound of the reference range. |
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| high | Quantity | High Range, if relevant Details The value of the high bound of the reference range. |
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| type | CodeableConcept | Reference range qualifier Details Codes to indicate the what part of the targeted reference population it applies to. |
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| appliesTo | CodeableConcept[] | Reference range population Details Codes to indicate the target population this reference range applies to. |
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| age | Range | Applicable age range, if relevant Details The age at which this reference range is applicable. |
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| text | string | Text based reference range in an observation Details Text based reference range in an observation. |
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| hasMember | Reference< Observation |
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| derivedFrom | Reference< DocumentReference |
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| component | ObservationComponent[] | Component results Details Some observations have multiple component observations. |
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| id | string | Unique id for inter-element referencing Details Unique id for the element within a resource. |
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| extension | Extension[] | Additional content defined by implementations Details May be used to represent additional information that is not part of the basic definition of the element. |
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| modifierExtension | Extension[] | Extensions that cannot be ignored even if unrecognized Details May be used to represent additional information that is not part of the basic definition of the element. |
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| code | ✓ | CodeableConcept | Type of component observation (code / type) Details Describes what was observed. |
| value[x] | Quantity, CodeableConcept, string, boolean, integer, Range, Ratio, SampledData, time, dateTime, Period | Actual component result Details The information determined as a result of making the observation. |
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| dataAbsentReason | CodeableConcept | Why the component result is missing Details Provides a reason why the expected value in the element Observation.component.value[x] is missing. |
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| interpretation | CodeableConcept[] | High, low, normal, etc. Details A categorical assessment of an observation value. |
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| referenceRange | [] | Provides guide for interpretation of component result Details Guidance on how to interpret the value by comparison to a normal or recommended range. |
Search Parameters
| Name | Type | Description | Expression |
|---|---|---|---|
| code | token | The code of the observation type | Observation.code |
| date | date | Obtained date/time | Observation.effective |
| identifier | token | The unique id for a particular observation | Observation.identifier |
| patient | reference | The subject that the observation is about | Observation.subject.where((resolve() is Patient)) |
| encounter | reference | Encounter related to the observation | Observation.encounter |
| based-on | reference | Reference to the service request. | Observation.basedOn |
| category | token | The classification of the type of observation | Observation.category |
| combo-code | token | The code of the observation type or component type | Observation.code |
| combo-value-concept | token | The value or component value of the observation, if the value is a CodeableConcept | Observation.value.ofType(CodeableConcept) |
| component-code | token | The component code of the observation type | Observation.component.code |
| component-value-concept | token | The value of the component observation, if the value is a CodeableConcept | Observation.component.value.ofType(CodeableConcept) |
| data-absent-reason | token | The reason why the expected value in the element Observation.value[x] is missing | Observation.dataAbsentReason |
| derived-from | reference | Related measurements the observation is made from | Observation.derivedFrom |
| device | reference | The Device that generated the observation data. | Observation.device |
| focus | reference | The focus of an observation when the focus is not the patient of record. | Observation.focus |
| has-member | reference | Related resource that belongs to the Observation group | Observation.hasMember |
| method | token | The method used for the observation | Observation.method |
| performer | reference | Who performed the observation | Observation.performer |
| specimen | reference | Specimen used for this observation | Observation.specimen |
| status | token | The status of the observation | Observation.status |
| subject | reference | The subject that the observation is about | Observation.subject |
| value-concept | token | The value of the observation, if the value is a CodeableConcept | Observation.value.ofType(CodeableConcept) |
| value-date | date | The value of the observation, if the value is a date or period of time | Observation.value.ofType(dateTime) |
| value-quantity | quantity | The value of the observation, if the value is a Quantity | Observation.value.ofType(Quantity) |
| code-value-concept | composite | Code and coded value parameter pair | Observation |
| component-code-value-concept | composite | Component code and component coded value parameter pair | Observation.component |
Inherited Elements
| Name | Required | Type | Description |
|---|---|---|---|
| id | string | Logical id of this artifact Details The logical id of the resource, as used in the URL for the resource. |
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| meta | Meta | Metadata about the resource Details The metadata about the resource. |
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| implicitRules | uri | A set of rules under which this content was created Details A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. |
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| language | code | Language of the resource content Details The base language in which the resource is written. |
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| text | Narrative | Text summary of the resource, for human interpretation Details A human-readable narrative that contains a summary of the resource. |
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| contained | Resource[] | Contained, inline Resources Details These resources do not have an independent existence apart from the resource that contains them. |
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| extension | Extension[] | Additional content defined by implementations Details May be used to represent additional information that is not part of the basic definition of the resource. |
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| modifierExtension | Extension[] | Extensions that cannot be ignored Details May be used to represent additional information that is not part of the basic definition of the resource. |