Originally assumed to encompass traditional computing as applied to medicine (healthcare computing), the remit for those working in the field now includes a wide range of devices such as home/hospital diagnostics and monitoring, imaging modalities, and patient-owned technologies for supporting self management and health improvement, all of which are data-enabled, contributing streams of important data that could and should be part of all-encompassing health information systems. These complex system and data integration challenges offer significant opportunities, but require research and even more thoughtfully devised technologies.
eHealth can thus be said to cover the interaction between patients and health-service providers, institution-to-institution transmission of data, or peer-to-peer communication between patients and/or health professionals; it can also include health information networks, electronic health records, telemedicine services, and personal wearable and portable communicable systems for monitoring and supporting patients.