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Development Document

This document will go over a few implementation details of this application.

Interfacing with SMART on FHIR compliant EMR servers

This application utilizes the SMART on FHIR framework which allows it to interface with SMART on FHIR compliant Electronic Medical Record (EMR) systems. We utilized the SMART Client JS library to help us interface and securely launch the application from EMR servers.

  • Using the SMART JS Client library, the solution requests authorization from the EMR server. The solution needs to be registered with the EMR server prior to use
  • The following scope permissions (specified in the src/pages/smartAuthRequest.js file) are required for the successful launch of the solution:

Scope definitions below are referenced from Cerner's SMART on FHIR tutorial

Scope Description
openid, profile Permission to retrieve information about the current logged-in user.
launch Permission to obtain launch context from an EHR.
online_access Permission to request a refresh token to obtain a new access token to replace an expired on. Remains usable as along as user remains online.
patient/Patient.read, patient/Observation.read, patient/Procedure.read, patient/Immunization.read, patient/MedicationRequest.read/ patient/Condition.read, patient/DiagnosticRequest.read Permission to read the relevant resources for the current patient.
  • After successful authorization with the EMR, a FHIR client instance is initialized within the context of the current patient. The solution then launches and starts loading.
  • The FHIR client is then used to query patient information from the following FHIR Resources on the EMR server:
Resource Information Obtained
Patient patient personal details (name, age, address, etc.)
Observation lab data, vitals (blood pressure, heart rate, etc.), imaging, social history, clinical assessment
Procedure surgical procedures, diagnostic procedures
Immunization vaccinations
MedicationRequest prescriptions
DiagnosticReport laboratory, pathology, and imaging reports
Condition conditions, problems, diagnosises

General Design

  • The solution was designed as a web application using the ReactJS framework on NodeJS.