10 Random Questions


A 65-kg 70-year-old man in the PACU is breathing spontaneously at 20/min through an endotracheal tube connected to a T-piece with a fresh gas flow of 5 L/min. He has a tidal volume of 350 mL and an FiO2 of 0.5. SpO2 decreases from 98% to 84% over one hour, then improves to 92% with an FiO2 of 1.0. Which of the following is the most likely cause of the hypoxemia?

BASIC Respiratory & Critical Care

A patient has a heart rate of 110 bpm one year after heart transplantation. His tachycardia is most likely the result of

ADVANCED Cardiac

An advantage of CPDA-1 over CPD for storage of packed red blood cells is

BASIC Transfusions & Fluids

Which of the following statements concerning the check valve of the common gas outlet on an anesthesia gas machine is true?

BASIC Equipment & Physics

An 18-year-old woman has knee pain during arthroscopy performed with femoral and sciatic nerve blocks for repair of a torn medial meniscus. The most appropriate management is addition of which of the following nerve blocks?

ADVANCED Regional & Pain

The second gas effect refers to

BASIC Pharmacology & Pharmacokinetics

A 62-year-old patient undergoes resection of a descending thoracic aneurysm under anesthesia with morphine, nitrous oxide, oxygen, and pancuronium. In spite of normal somatosensory evoked potentials (SSEP) during the procedure, the patient has paraplegia postoperatively. The factor most likely responsible for failure to note the deficit intraoperatively is


A 72-year-old man has had residual hemiparesis since having a cerebrovascular accident three years ago. Compared with the response of the unaffected limbs to nondepolarizing muscle relaxants, the hemiparetic limbs will show


A 65-kg man is scheduled for wrist surgery with intravenous regional anesthesia with 0.5% lidocaine 50 ml. Which of the following statements is true?

ADVANCED Regional & Pain

In treating arterial hypertension in a patient with a head injury, the agent LEAST likely to increase intracranial pressure is

ADVANCED Pharmacology & Pharmacokinetics Neuro