Synchronous care is care that happens in real time: the patient and the clinician are present on the same audio or video channel at the same moment, exactly as in a face-to-face visit compressed onto a screen. The mechanism is a live media session, almost always built on WebRTC (the open standard browsers and apps use for real-time audio and video), in which both sides exchange a continuous stream rather than uploading something to be reviewed later.
This real-time nature inherits the hardest engineering constraints in the whole field. One-way latency above roughly 300–500 milliseconds starts to break natural conversation; people talk over each other and clinical rapport suffers. More seriously, a call that drops in the middle of a consultation is a clinical event, not a mere inconvenience — a clinician may have been mid-assessment of a worsening symptom. That reframes reliability work (automatic reconnection, graceful degradation to audio-only when bandwidth collapses, clear connection-state signaling) as part of the clinical safety bar rather than a nice-to-have.
For a telemedicine product team this means investing in measured quality of service — jitter, packet loss, and latency monitoring — and in honest failure behavior. A common pitfall is optimizing only for the happy path on good Wi-Fi while ignoring the patient on a weak cellular connection at home, which is precisely the population telemedicine is meant to reach. Synchronous care also carries the full HIPAA load: the live media must be encrypted in transit, and any recording must be handled as PHI.
