Figure 2.

(A) Three calibration cycles of a single oxygen-sensitive tube (PO₂: 160, 76, 38, and 0 mmHg, in order). Average lifetime values for each plateau (at each gas mixture) across the three cycles are 19.0 ± 0.07, 21.6 ± 0.08, 24.9 ± 0.04 and 34.1 ± 0.06 µs, respectively. (B) DIGT performed on an animal 3 days after device implantation. Risetime is defined as elapsed time between exchanging inhaled gas from 152 to 760 mmHg (left green circle) and steady state (right green circle).