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.

Glucose 5% infusion 500ml bags, 500ml, intravenous, continuous infusion, over 8 hours

Non dm+d (ingredient) based prescription. Route, method and dose duration. 
<MedicationRequest xmlns="http://hl7.org/fhir">
    <id value="6b122dc2-89b2-4f93-9139-3012f6669857" />
    <contained>
        <Medication>
            <id value="med1" />
            <form>
                <coding>
                    <system value="http://snomed.info/sct" />
                    <code value="14964511000001102" />
                    <display value="Infusion" />
                </coding>
            </form>
            <ingredient>
                <itemCodeableConcept>
                    <coding>
                        <system value="http://snomed.info/sct" />
                        <code value="768547002" />
                        <display value="Anhydrous Glucose" />
                    </coding>
                </itemCodeableConcept>
                <amount>
                    <numerator>
                        <value value="50" />
                        <unit value="gram" />
                        <system value="http://unitsofmeasure.org" />
                        <code value="g" />
                    </numerator>
                    <denominator>
                        <value value="1" />
                        <unit value="liter" />
                        <system value="http://unitsofmeasure.org" />
                        <code value="L" />
                    </denominator>
                </amount>
            </ingredient>
        </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="8" />
                <durationUnit value="h" />
            </repeat>
        </timing>
        <method>
            <coding>
                <system value="http://snomed.info/sct" />
                <code value="261754007" />
                <display value="Continuous infusion" />
            </coding>
        </method>
        <rateRatio>
            <numerator>
                <value value="100" />
                <unit value="millilitre" />
                <system value="http://unitsofmeasure.org" />
                <code value="mL" />
            </numerator>
            <denominator>
                <value value="1" />
                <unit value="hour" />
                <system value="http://unitsofmeasure.org" />
                <code value="h" />
            </denominator>
        </rateRatio>
    </dosageInstruction>
</MedicationRequest>

{
    "resourceType": "MedicationRequest",
    "id": "6b122dc2-89b2-4f93-9139-3012f6669857",
    "contained":  [
        {
            "resourceType": "Medication",
            "id": "med1",
            "form": {
                "coding":  [
                    {
                        "system": "http://snomed.info/sct",
                        "code": "14964511000001102",
                        "display": "Infusion"
                    }
                ]
            },
            "ingredient":  [
                {
                    "itemCodeableConcept": {
                        "coding":  [
                            {
                                "system": "http://snomed.info/sct",
                                "code": "768547002",
                                "display": "Anhydrous Glucose"
                            }
                        ]
                    },
                    "amount": {
                        "numerator": {
                            "value": 50,
                            "unit": "gram",
                            "system": "http://unitsofmeasure.org",
                            "code": "g"
                        },
                        "denominator": {
                            "value": 1,
                            "unit": "liter",
                            "system": "http://unitsofmeasure.org",
                            "code": "L"
                        }
                    }
                }
            ]
        }
    ],
    "status": "active",
    "intent": "order",
    "medicationReference": {
        "reference": "#med1"
    },
    "subject": {
        "identifier": {
            "system": "https://fhir.nhs.uk/Id/nhs-number",
            "value": "9999999999"
        }
    },
    "dosageInstruction":  [
        {
            "timing": {
                "repeat": {
                    "duration": 8,
                    "durationUnit": "h"
                }
            },
            "method": {
                "coding":  [
                    {
                        "system": "http://snomed.info/sct",
                        "code": "261754007",
                        "display": "Continuous infusion"
                    }
                ]
            },
            "rateRatio": {
                "numerator": {
                    "value": 100,
                    "unit": "millilitre",
                    "system": "http://unitsofmeasure.org",
                    "code": "mL"
                },
                "denominator": {
                    "value": 1,
                    "unit": "hour",
                    "system": "http://unitsofmeasure.org",
                    "code": "h"
                }
            }
        }
    ]
}
MedicationRequest.id[0]6b122dc2-89b2-4f93-9139-3012f6669857
MedicationRequest.contained[0].id[0]med1
MedicationRequest.contained[0].form[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.contained[0].form[0].coding[0].code[0]14964511000001102
MedicationRequest.contained[0].form[0].coding[0].display[0]Infusion
MedicationRequest.contained[0].ingredient[0].item[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.contained[0].ingredient[0].item[0].coding[0].code[0]768547002
MedicationRequest.contained[0].ingredient[0].item[0].coding[0].display[0]Anhydrous Glucose
MedicationRequest.contained[0].ingredient[0].amount[0].numerator[0].value[0]50
MedicationRequest.contained[0].ingredient[0].amount[0].numerator[0].unit[0]gram
MedicationRequest.contained[0].ingredient[0].amount[0].numerator[0].system[0]http://unitsofmeasure.org
MedicationRequest.contained[0].ingredient[0].amount[0].numerator[0].code[0]g
MedicationRequest.contained[0].ingredient[0].amount[0].denominator[0].value[0]1
MedicationRequest.contained[0].ingredient[0].amount[0].denominator[0].unit[0]liter
MedicationRequest.contained[0].ingredient[0].amount[0].denominator[0].system[0]http://unitsofmeasure.org
MedicationRequest.contained[0].ingredient[0].amount[0].denominator[0].code[0]L
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]8
MedicationRequest.dosageInstruction[0].timing[0].repeat[0].durationUnit[0]h
MedicationRequest.dosageInstruction[0].method[0].coding[0].system[0]http://snomed.info/sct
MedicationRequest.dosageInstruction[0].method[0].coding[0].code[0]261754007
MedicationRequest.dosageInstruction[0].method[0].coding[0].display[0]Continuous infusion
MedicationRequest.dosageInstruction[0].rate[0].numerator[0].value[0]100
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]hour
MedicationRequest.dosageInstruction[0].rate[0].denominator[0].system[0]http://unitsofmeasure.org
MedicationRequest.dosageInstruction[0].rate[0].denominator[0].code[0]h
MedicationRequest
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