Although FHIR has been designed to be easy to implement, it requires knowledge that is still hard to find. We aim to evaluate the use of FHIR in Portuguese projects for the integration of medical devices. Two projects were selected, including easyHealth4Covid (EH4C) and Chronic Diseases Management Platform (CDMP). The evolution of each project and the FHIR resources used were analyzed. 11 different sensors of 5 companies were used in the sum of both projects. Previously, none of them used FHIR to integrate and the teams had little to no experience in doing so. The FHIR Observation resource was used for all. There is a general lack of knowledge of the FHIR standard and terminologies of most of the device companies involved in the projects.
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