Entity: Medication [web]

This page provides more detail on how the web interface displays medication information, which it fetches from the Aggregated FHIR API.

The Manual provides more information on the functionality; this page is aimed at a technical audience who need to understand which FHIR elements are used to populate the information displayed.

FHIR Resources

The web interface populates Medicines from the following FHIR resources:

Overview

The web interface shows a list of medications. These are separated into “Current medicines” and “Past medicines”. A medication is considered to be current unless either of the following are true:

The medication has an End Timestamp which is in the past
The medication Status is INACTIVE

Mappings

Component	MedicationRequest	MedicationStatement
Status This is not shown explicitly, but is included in the logic which determines if the medication is current or past.	status status code mappings (FHIR → PKB): active → ??? on-hold → ??? cancelled → ??? completed → ??? entered-in-error → ??? stopped → ??? draft → ??? unknown → ???	status status code mappings (FHIR → PKB): active → ??? completed → ??? entered-in-error → ??? intended → ??? stopped → ??? on-hold → ??? unknown → ??? not-taken → ???
Substance	<conditional> If medicationReference is populated: ??? Else: ???
Start Timestamp	<conditional> If this extension is present: http://nictiz.nl/fhir/StructureDefinition/zib-Medication-PeriodOfUse extension[x]: valuePeriod.start Else: authoredOn	effectivePeriod.start
End Timestamp	<conditional> If this extension is present: http://nictiz.nl/fhir/StructureDefinition/zib-Medication-PeriodOfUse extension[x]: valuePeriod.end Else: No value.	effectivePeriod.end
Frequency Text
Frequency Value
Frequency Units
Frequency Priority
Dose Value	First, the main Dosage is determined as follows (from the dosageInstruction element for MedicationRequest, or dosage element for MedicationStatement): If there is exactly one Dosage where sequence is 1, then use that Dosage Otherwise use the first Dosage in the list Then, we inspect the main Dosage and retrieve: doseAndRep[0].doseQuantity.value
Dose Units		First, the main Dosage is determined as follows (from the dosage element): If there is exactly one Dosage where sequence is 1, then use that Dosage Otherwise use the first Dosage in the list Then, we inspect the main Dosage and retrieve: doseAndRep[0].doseQuantity If this Quantity has a code, no unit and no system, then it is considered to contain a PKB-assigned code. Otherwise, we inspect the first Dosage (which might differ from the previously determined main Dosage) and inspect doseAndRep[0].doseQuantity for the http://fhir.patientsknowbest.com/structuredefinition/dose-units extension.
Medication Unit
Instructions