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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
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