Digital health company Celero Systems is developing an electronic pill that can measure heart rate, breathing rate, and core temperature—from inside the human stomach. As a first step, the company envisions people with ongoing conditions using the digital capsule to monitor their vital signs at home. But in the future, they hope to use it as a kind of internal alarm system for drug-related overdoses.
In a small clinical trial published in November, the company tested the device on people with sleep apnea, a disorder in which breathing occasionally stops and starts at night. To get a proper diagnosis, people often need to spend
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