FCA(SA) Final Practice Questions - Fellowship Of The College Of Anaesthetists Of South Africa Final Examination Exam

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During one-lung ventilation for right thoracotomy, SpO2 falls to 88% despite FiO2 1.0 and optimal DLT position confirmed on fibreoptic bronchoscopy. What is the most appropriate next step?

Apply continuous positive airway pressure (CPAP) of 5–10 cmH2O to the dependent (ventilated) lung Apply CPAP of 5–10 cmH2O to the non-dependent (surgical) lung Immediately clamp the pulmonary artery to the operative lung Convert to total intravenous anaesthesia with propofol

Correct Answer:

Apply CPAP of 5–10 cmH2O to the non-dependent (surgical) lung

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