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Table 2 Relationship between arterial pH and PaCO2 at the conclusion of apnea test

From: The effect of incorporating an arterial pH target during apnea test for brain death determination

Value at end of AT

PaCO2 > 60 or > 20 mm Hg above baseline (positive AT) ‡, n

PaCO2 < 60 or < 20 mm Hg above baseline (inconclusive AT) ‡, n

pH < 7.30

83

3

pH ≥ 7.30

4

1

Total

87

4

  1. AT apnea test, BD brain death
  2. ‡Seven patients were excluded from analysis (4 due aborted AT due to complication, and 3 due unavailable pH data). Patients with inconclusive AT underwent ancillary studies to confirm BD