Scene Context: Mission Control sees a sharp spike in Sarah's heart rate, changes in respiration, and telemetry indicating separation from the ship even before the voice message about the accident arrives.
Essence of the Phenomenon: Biomedical telemetry is the remote transmission of a human's physiological parameters: heart rate, respiration, blood pressure, the status of life support systems, and other critical metrics.
Scientific Basis: Continuous medical monitoring of astronauts has been utilized by NASA since the dawn of crewed spaceflight. Modern spacesuit and flight systems treat biomedical data as part of standard telemetry. The concepts for the xEMU and subsequent systems explicitly include suit telemetry, biomedical data, position/heading, and other data streams accessible to the crew and support systems.