Dose syntax implementation guidance for FHIR STU3

This guidance is under active development by NHS Digital and content may be added or updated on a regular basis.

Voluven 10% infusion 500ml Freeflex bags (Fresenius Kabi Ltd), infuse intravenously at a rate of 30ml/kg for 10 hours

Product-based prescription. Route method, dose duration, and dose expressed a rate ratio.

Note The rateRatio could also be modelled using a UCUM unit within a doseQuantity. In this example we are using the slightly more complex rateRatio structre.

<doseQuantity>
  <value value="30"/>
  <unit value="millilitres per kilogram"/>
  <system value="http://unitsofmeasure.org"/>
  <code value="ml/kg"/>
</doseQuantity>

<MedicationRequest xmlns="http://hl7.org/fhir">
<id value="10850aa9-133b-4a33-aea7-5bef3b71ab9b" />
<contained>
<Medication>
<id value="med1" />
<code>
<coding>
<system value="http://snomed.info/sct" />
<code value="21514511000001103" />
<display value="Voluven 10% infusion 500ml Freeflex bags (Fresenius Kabi Ltd)" />
</coding>
</code>
</Medication>
</contained>
<status value="active" />
<intent value="order" />
<medicationReference>
<reference value="#med1" />
</medicationReference>
<subject>
<identifier>
<system value="https://fhir.nhs.uk/Id/nhs-number" />
<value value="9999999999" />
</identifier>
</subject>
<dosageInstruction>
<timing>
<repeat>
<duration value="10" />
<durationUnit value="h" />
</repeat>
</timing>
<route>
<coding>
<system value="http://snomed.info/sct" />
<code value="47625008" />
<display value="intravenous" />
</coding>
</route>
<method>
<coding>
<system value="http://snomed.info/sct" />
<code value="129330003" />
<display value="infusion" />
</coding>
</method>
<rateRatio>
<numerator>
<value value="30" />
<unit value="millilitre" />
<system value="http://unitsofmeasure.org" />
<code value="mL" />
</numerator>
<denominator>
<value value="1" />
<unit value="kilogram" />
<system value="http://unitsofmeasure.org" />
<code value="kg" />
</denominator>
</rateRatio>
</dosageInstruction>
</MedicationRequest>
{
"resourceType": "MedicationRequest",
"id": "10850aa9-133b-4a33-aea7-5bef3b71ab9b",
"contained": [
{
"resourceType": "Medication",
"id": "med1",
"code": {
"coding": [
{
"system": "http://snomed.info/sct",
"code": "21514511000001103",
"display": "Voluven 10% infusion 500ml Freeflex bags (Fresenius Kabi Ltd)"
}
]
}
}
],
"status": "active",
"intent": "order",
"medicationReference": {
"reference": "#med1"
},
"subject": {
"identifier": {
"system": "https://fhir.nhs.uk/Id/nhs-number",
"value": "9999999999"
}
},
"dosageInstruction": [
{
"timing": {
"repeat": {
"duration": 10,
"durationUnit": "h"
}
},
"route": {
"coding": [
{
"system": "http://snomed.info/sct",
"code": "47625008",
"display": "intravenous"
}
]
},
"method": {
"coding": [
{
"system": "http://snomed.info/sct",
"code": "129330003",
"display": "infusion"
}
]
},
"rateRatio": {
"numerator": {
"value": 30,
"unit": "millilitre",
"system": "http://unitsofmeasure.org",
"code": "mL"
},
"denominator": {
"value": 1,
"unit": "kilogram",
"system": "http://unitsofmeasure.org",
"code": "kg"
}
}
}
]
}
MedicationRequest.id[0]10850aa9-133b-4a33-aea7-5bef3b71ab9b
MedicationRequest.contained[0].id[0]med1
MedicationRequest.contained[0].code[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.contained[0].code[0].coding[0].code[0]21514511000001103
MedicationRequest.contained[0].code[0].coding[0].display[0]Voluven 10% infusion 500ml Freeflex bags (Fresenius Kabi Ltd)
MedicationRequest.status[0]active
MedicationRequest.intent[0]order
MedicationRequest.medication[0].reference[0]#med1
MedicationRequest.subject[0].identifier[0].system[0]https://fhir.nhs.uk/Id/nhs-number
MedicationRequest.subject[0].identifier[0].value[0]9999999999
MedicationRequest.dosageInstruction[0].timing[0].repeat[0].duration[0]10
MedicationRequest.dosageInstruction[0].timing[0].repeat[0].durationUnit[0]h
MedicationRequest.dosageInstruction[0].route[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.dosageInstruction[0].route[0].coding[0].code[0]47625008
MedicationRequest.dosageInstruction[0].route[0].coding[0].display[0]intravenous
MedicationRequest.dosageInstruction[0].method[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.dosageInstruction[0].method[0].coding[0].code[0]129330003
MedicationRequest.dosageInstruction[0].method[0].coding[0].display[0]infusion
MedicationRequest.dosageInstruction[0].rate[0].numerator[0].value[0]30
MedicationRequest.dosageInstruction[0].rate[0].numerator[0].unit[0]millilitre
MedicationRequest.dosageInstruction[0].rate[0].numerator[0].system[0]http://unitsofmeasure.org
MedicationRequest.dosageInstruction[0].rate[0].numerator[0].code[0]mL
MedicationRequest.dosageInstruction[0].rate[0].denominator[0].value[0]1
MedicationRequest.dosageInstruction[0].rate[0].denominator[0].unit[0]kilogram
MedicationRequest.dosageInstruction[0].rate[0].denominator[0].system[0]http://unitsofmeasure.org
MedicationRequest.dosageInstruction[0].rate[0].denominator[0].code[0]kg
MedicationRequest
back to top