Continuous positive airway pressure for treating hypoxemia due to pulmonary vein injury: A case report

Table 1 Oxygenation status of the patient at different time points

	Immediately after blocking the pulmonary vein	5 min after blocking the pulmonary vein	10 min after blocking the pulmonary vein, start CPAP	5 min after CPAP	25 min after CPAP
SpO2, %	97	87	66	84	90
PaO2 (mmHg)	-	-	-	63.4	79.2
PaCO2 (mmHg)	-	-	-	63.2	71
PETCO2 (mmHg)	34	32	39	31	43

CPAP: Continuous positive airway pressure; SpO₂: Pulse oxygen saturation; PaO₂: Partial pressure of oxygen in artery; PaCO₂: Partial pressure of carbon dioxide in artery; PETCO₂: End tidal carbon dioxide.

Table 2 Common hypoxemia management methods

Ensure that FiO2 = 1	Already used, but unable to improve
Check BB position with a fiberoptic bronchoscope	Already used, but unable to improve
Ensure optimal cardiac output and reduce volatile anesthetics (< 1MAC)	Already used, but unable to improve
Apply recruitment maneuver to the ventilated lung	Already used, but unable to improve
Apply PEEP (5 cmH2O) to the ventilated lung	Already used, but unable to improve
Perform intermittent re-expansion on the non-ventilated lung	Unable to apply
Mechanically restrict blood flow of the non-ventilated lung	Unable to apply

FiO2: Fraction of inspired oxygen; BB: Bronchial blocker; MAC: Minimum alveolar concentration; PEEP: Positive end-expiratory pressure.