There are cheap dongles that can do sonograms good enough for office use, sensors and apps that can do blood tests, sweat tests and other chemical diagnostics. One type of pill has been developed that reports when the patient has swallowed it. When the pill encounters stomach acids, it sends out a tiny electronic pulse. The pulse is picked up by a small adhesive patch the patient wears on his or her abdomen. The patch, in turn, detects when the patient’s smart phone is on and close by, and sends out a Bluetooth signal. An app on the phone picks up the Bluetooth signal and sends an instant message to the clinician who is tracking the use of the drug.

via Medical apps: We are approaching the tipping point.

Interesting article.