Figure 2.

SmartPill apparatus

(A) capsule (2.6 × 1.3 cm). (B) pH calibration buffer solution. (C) data receiver and logger. (D) laptop. (E) graph showing pH (green line), temperature (blue line), and pressure (red bars) over time. Note the abrupt rise of the pH values in the left part of the screen, signaling the passage from the stomach to the small bowel, the slow build-up of the signal in the small bowel, and the rapid decrease marking the entrance of the pill in the large bowel. Adapted from a picture of Medtronic plc. Data shown in graph E collected from a participant in our lab.