Secure Health Data Storage Article - Create Observation Snippet

secure-data-create-observation.ts

const createObservation = async (accountId: string, projectId: string, patientId: string) => {
  const observation = await fetch(`https://fhir.us.lifeomic.com/${accountId}/dstu3/Observation`, {
    method: 'POST',
    headers: {
      authorization: `Bearer ${process.env.PHC_API_KEY}`,
      'content-type': 'application/json'
    },
    body: JSON.stringify({
      resourceType: "Observation",
      
      // Record the subject of the observation. In this case
      // who is being weighed.
      subject: {
        reference: `Patient/${patientId}`
      },
      
      // Record the data from the observation. The weight
      // and time of weighing
      effectiveDateTime: "2022-07-28",
      valueQuantity: {
        value: 152,
        unit: "lbs",
        system: "http://unitsofmeasure.org",
        code: "[lb_av]"
      },
      
      // Record what type of measurement this is. There are
      // registiries of existing measurement types, LIONC and SNOMED,
      // but you can make up your own too.
      code: {
        coding: [
          {
            system: "http://loinc.org",
            code: "29463-7",
            display: "Body Weight"
          },
          {
            system: "http://loinc.org",
            code: "3141-9",
            display: "Body weight Measured"
          },
          {
            system: "http://snomed.info/sct",
            code: "27113001",
            display: "Body weight"
          }
        ]
      },
      
      // Same as for creating Patients, this resource must be owned by a PHC project
      meta: {
        tag: [
          {
            system: 'http://lifeomic.com/fhir/dataset',
            code: projectId
          }
        ]
      }
    })
  })

  // The result from the POST is a copy of the body from above
  // and also includes a new `id` attribute.
  //    {
  //      "id": <newid>
  //      "resourceType": "Observation",
  //      ...rest
  //    }
  return observation.json();
}