Arab Board Anesthesia Final Written Practice Questions - Arab Board Of Health Specializations (ABHS) Anesthesia And Intensive Care Final Written Examination Exam

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During left thoracotomy with one-lung ventilation (OLV) to the right lung, the pulse oximeter saturation gradually declines to 84%. Position of the double-lumen tube is reconfirmed via fiberoptic bronchoscopy, and 100% FiO2 is already being delivered. What is the most effective next step to treat hypoxemia?

Clamp the pulmonary artery of the dependent ventilated lung immediately Increase the tidal volume on the ventilated dependent lung to 12 mL/kg Administer high-dose inhaled nitric oxide to the operative non-ventilated lung Apply continuous positive airway pressure (CPAP 5 to 10 cmH2O) with 100% oxygen to the non-ventilated operative lung

Correct Answer:

Apply continuous positive airway pressure (CPAP 5 to 10 cmH2O) with 100% oxygen to the non-ventilated operative lung

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