Dosage quantity in MedicationAdministration

[Nikson k john]

Hi,

I have seen that one "quantity" element  inside dosage node of MedicationAdministration of patient 4642007.

What does it mean "quantity"? Is it RateQuantity or DoseQuantity?

{

  "dosage": {

    "text": "1000 mL IV at 125 mL/hr",

    "siteCodeableConcept": {

      "coding": [

        {

          "system": "http://snomed.info/sct",

          "code": "78791008",

          "display": "structure of right hand (body structure)",

          "userSelected": false

        }

      ],

      "text": "Right Hand"

    },

    "quantity": {

      "value": 100,

      "unit": "mL",

      "system": "http://unitsofmeasure.org",

      "code": "mL"

    },

    "rateRatio": {

      "numerator": {

        "value": 125,

        "unit": "mL",

        "system": "http://unitsofmeasure.org",

        "code": "mL"

      },

      "denominator": {

        "value": 1,

        "unit": "h",

        "system": "http://unitsofmeasure.org",

        "code": "h"

      }

    }

  }

}

regards,

Nikson

[Max Philips (Cerner)]

Hi Nikson,

MedicationAdministration.dosage.quantity is the "amount administered in one dose"

http://hl7.org/fhir/DSTU2/medicationadministration-definitions.html#MedicationAdministration.dosage.quantity

It's likely that this particular case is just some test data and that is why the quantity doesn't match the total dose or the rate. We'll take a closer look at that particular MedicationAdministration.

Thanks,

Max (Cerner)

[Max Philips (Cerner)]

Hi Nikson,

I consulted some team members with more clinical knowledge on what is being represented here. When a MedicationAdministration is documented manually, a clinician would set the quantity by hand, so it may not line up exactly with the other fields on the MedicationAdministration.

What this particular MedicationAdministration represents (id: 7277367) in conjunction with another MedicationAdministration (id: 7277363) is that the patient received 50 mL of medication between 22:20 and 22:40, and 100 mL of medication between 22:40 and 23:00. In the real world, these MedAdmins would have been charted as a result of the patient's MedicationOrder 22954301 which is the order for Dextrose 2.5% with 0.45% NaCl 1000 mL @ 125 mL/hr, IV. Some sites may have infusion management solutions, which would tend towards more precise results, but possible scenarios where this type of data would be observed include IV pump issues/stoppages or discrepancies in manual documentation.

Thanks,

Max (Cerner)

[Nikson k john]

Thanks for the clarification

regards,

Nikson