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One Lung Ventilation - ITE Question

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Prior to occlusion of any major pulmonary blood vessels during a thoracotomy, applying positive end-expiratory pressure to ventilation through the dependent lumen of a double-lumen tube and occluding the upper lumen of the tube will
  • (A) increase blood flow to the dependent lung
  • (B) increase the alveolar-arterial oxygen tension difference
  • (C) override hypercarbic pulmonary vasoconstriction
  • (D) improve the patient's oxygenation
  • (E) increase the right ventricular dP/dt

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