10 Random Questions


Which of the following results in decreased mixed venous oxygen saturation?

BASIC Respiratory & Critical Care General

A 58-year-old man undergoes repeat coronary artery bypass grafting. Which of the following is LEAST likely to decrease the need for exogenous blood transfusion?


A 50-year-old woman notes loss of sensation in the medial lower leg 24 hours after vaginal hysterectomy in the lithotomy position. Which of the following nerves is most likely to be injured?


The ECG rhythm shown developed during cholecystectomy in a 62-year-old man who had a myocardial infarction and is taking atenolol. The drug of choice for treating this dysrhythmia is


Ninety minutes after administration of succinylcholine 1 mg/kg to a 28-year-old woman, the train-of-four shows a T4:T1 ratio of 25%. This is most consistent with

BASIC Pharmacology & Pharmacokinetics

A 157 cm (5 ft 2 in), 180-kg, 40-year-old woman has a PaO2 of 65 mmHg, a PaCO2 of 38 mmHg, and a pH of 7.43 while breathing room air preoperatively. The most likely cause of these values is

BASIC Respiratory & Critical Care

A 120-kg 56-year-old man undergoing gastrectomy during anesthesia with fentanyl and isoflurane has a PetCO2 of 35 mmHg and a PaCO2 of 50 mmHg. His FEV,/FVC ratio is 80% of predicted. Heart rate is 120 bpm and arterial blood pressure is 80/40 mmHg. Which of the following is the most likely cause of the difference in PaCO2 and PetCO2?

ADVANCED Respiratory & Critical Care General

A 70-year-old man undergoes cross clamping of the aorta for repair of an abdominal aneurysm. Which of the following methods is most appropriate for decreasing hypotension associated with removal of the cross clamp?

ADVANCED General

A 40-year-old woman is undergoing a posterior fossa craniotomy in the sitting position for clipping of a basilar artery aneurysm. Nitroprusside is being used to maintain mean arterial pressure at 50 mmHg, measured at head level. During dissection, over the course of one minute, the mean blood pressure decreases to 30 mmHg. Simultaneously, end-tidal carbon dioxide and pulmonary artery pressures decrease and heart rate increases. The most likely cause of these changes is


In which of the following clinical circumstances does down-regulation of beta-adrenergic receptors occur?