Which of the following is most likely to occur during mediastinoscopy?
(A) Chylothorax
(B) Compression of the innominate artery
(C) Injury to the superior laryngeal nerve
(D) Tracheal tear
(E) Venous air embolism
B
During controlled ventilation, which of the following will cause an increase in end-tidal carbon dioxide tension with a normal waveform on the capnograph?
(A) Bronchospasm
(B) Rapid blood loss
(C) Ventricular fibrillation
(D) Endobronchial migration of the endotracheal tube
A 22-year-old woman at 33 weeks' gestation has abdominal pain and vaginal bleeding after sustaining blunt trauma to the abdomen. Heart rate is 125 bpm, blood pressure is 98/65 mmHg, and respiratory rate is 20/min. Fetal heart rate is 100 bpm. Which of the following is the most appropriate management?
(A) Conservative observation and monitoring if fetal immaturity is seen on ultrasound
(B) Increasing maternal blood pressure with a vasopressor
(C) Infusion of terbutaline
(D) Lumbar epidural anesthesia
(E) Urgent cesarean delivery
E
The preanesthetic ECG trace (lead II) shown from a 32-year-old woman suggests
A 75-year-old woman with significant carotid artery stenosis is scheduled for general anesthesia for repair of a fractured hip. Which of the following is the greatest disadvantage of using propofol as an induction agent in this patient?
Which of the following nerves should be blocked for an operation at the medial aspect of the lower leg?
(A) Femoral
(B) Sciatic
(C) Obturator
(D) Common peroneal
(E) Tibial
A
During induced hypotension for clipping of a cerebral aneurysm in a 20-degree head-up position, the arterial pressure transducer should be zero referenced at which level?
(A) External auditory meatus
(B) Midaxillary line at the fifth intercostal space
(C) Sternal notch
(D) Thyroid cartilage
(E) Top of the cranium
A
A 68-year-old woman is scheduled for a mastectomy. She has not taken prescription medications for 24 hours. Preoperative examination shows a heart rate of 104 bpm and blood pressure of 200/105 mmHg. The most likely cause of these findings is omission of which of the following drugs?
(A) Amiodarone
(B) Clonidine
(C) Enalapril
(D) Hydralazine
(E) Nifedipine
B
At a body temperature of 30°C, resistance to blood flow increases because of
(A) increased hematocrit
(B) increased plasma fibrinogen concentration
(C) increased viscosity of blood
(D) rouleaux formation of red blood cells
(E) sequestration of platelets in portal circulation