The device may be any pertinent device specified in the device resource. Examples of devices that may be requested include a wheelchair, hearing aids, or an insulin pump. The request may lead to the dispensing of the device to the patient or for use by the patient. The device use request may represent an order or a prescription entered by a practitioner in a CPOE (Computerized Physician Order Entry) system or a proposal made by a clinical decision support (CDS) system based on a patient’s clinical record and context of care.
Device Request resource deals with the allocation of a device to a patient and while it may contain instructions on how to use the device, the data about getting the device to the patient is addressed in other resources. For example, certain devices must be implanted via a surgical or other procedure and the implantation or explanation is represented in the Procedure Resource or Service Request resource.
The Supply Request resource is similar in that it deals with requesting a particular item for a specific patient. However, Device Request is concerned with items where there is a patient focus, or instructions regarding their use, whereas Supply Request is concerned with inventory management. This resource is referenced by Care Plan, Claim and Observation.
Fast Healthcare Interoperability Resources (FHIR) is a draft standard describing data formats and elements (known as “resources”) and an application programming interface (API) for exchanging electronic health records. The standard was created by the Health Level Seven International (HL7) health-care standards organization.
Its goal is to facilitate interoperation between legacy healthcare systems, to make it easy to provide healthcare information to healthcare providers and individuals on a wide variety of devices from computers to tablets to cell phones, and to allow third-party application developers to provide medical applications which can be easily integrated into existing systems.
FHIR provides an alternative to document-centric approaches by directly exposing discrete data elements as services. For example, basic elements of healthcare like patients, admissions, diagnostic reports and medications can each be retrieved and manipulated via their own resource URLs (Uniform Resource Locators). FHIR was supported at an American Medical Informatics Association meeting by many EHR (Electronic Health Record) vendors which value its open and extensible nature.