10 Random Questions

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

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 4-year-old child with myelomeningocele and a ventriculoperitoneal shunt is scheduled for bladder augmentation. One year ago, hypotension and bronchospasm occurred during laparotomy for placement of a feeding gastrostomy and responded to fluids and epinephrine. At that time, anesthesia was induced with thiopental, the trachea was intubated with a polyvinyl tracheal tube following administration of succinylcholine, and anesthesia was maintained with halothane and nitrous oxide. No diagnostic tests were performed after that incident. Which of the following should be avoided during the bladder augmentation?

ADVANCED Pediatric

A mechanically ventilated newborn infant is undergoing gastroschisis repair during halothane anesthesia. Based on the right radial artery catheter tracing shown, which of the following is the most appropriate conclusion?

ADVANCED Pediatric

A 54-year-old man receives 25 ml of a 50% alcohol and 0.25% bupivacaine solution for celiac plexus block. During the next 20 minutes, blood pressure decreases from 130/75 mmHg to 85/55 mmHg. Which of the following is the most likely cause?

ADVANCED Regional & Pain

A 23-year-old man who is receiving his first anesthetic has not resumed spontaneous ventilation two hours after receiving succinylcholine. The train-of-four monitor shows no twitch response. Which of the following is the most likely cholinesterase genotype in this patient?

ADVANCED Pharmacology & Pharmacokinetics General

Following transfusion of packed red blood cells during general anesthesia, the patient's blood pressure decreases, heart rate and temperature increase, and hemoglobinuria and diffuse oozing are observed. Which of the following is the most appropriate first step in management?

BASIC Transfusions & Fluids General

A subarachnoid block to a sensory level of the second thoracic dermatome is associated with each of the following EXCEPT

BASIC Regional & Pain

Each of the following changes is expected with deliberate hypothermia EXCEPT

BASIC General Cardiac

Which of the following nerves should be blocked for an operation at the medial aspect of the lower leg?