10 Random Questions
Which of the following muscle relaxants in an ED95 dose would have the longest duration of action in a patient with renal failure?
- (A) Atracurium
- (B) Metocurine
- (C) Pancuronium
- (D) d-Tubocurarine
- (E) Vecuronium
During anesthesia with nitrous oxide 65% in oxygen, fentanyl, and pancuronium, nitroprusside is administered to decrease arterial pressure to 85/50 mmHg. A decrease in PaO2 from 120 to 65 mmHg is most likely caused by
- (A) cyanide toxicity
- (B) depressed cardiac output
- (C) mild hypercarbia
- (D) metabolic acidosis
- (E) pulmonary vasodilation
In an adult undergoing laparotomy, which of the following is the most effective means of maintaining body temperature during the first hour of anesthesia?
- (A) Increasing ambient temperature
- (B) Using a warming blanket
- (C) Warming inspired gases
- (D) Warming intravenous fluids
- (E) Warming irrigating fluids
Electrocautery units operate at frequencies between 300 kHz and 2 mHz to
- (A) avoid pacemaker interference
- (B) minimize ECG tracing interference
- (C) minimize the likelihood of ventricular fibrillation
- (D) optimize hemostasis
- (E) provide the best "cutting" current
A sensory level of T2 is achieved after administration of spinal anesthesia. Which of the following lung volumes is LEAST likely to be affected?
- (A) Expiratory reserve volume
- (B) Inspiratory reserve volume
- (C) Inspiratory capacity
- (D) Tidal volume
- (E) Vital capacity
A patient who is scheduled for emergency debridement of an infected wound on the sole has trismus, rigidity of facial muscles, and spasms of the intercostal muscles, diaphragm, and extremities. During anesthesia, this patient is at increased risk for each of the following EXCEPT
- (A) hypotension
- (B) hypertension
- (C) tachycardia
- (D) diaphoresis
- (E) hypothermia
When methylmethacrylate is inserted into the femur, each of the following may occur EXCEPT
- (A) monomer metabolic breakdown
- (B) vasodilation
- (C) hypercarbia
- (D) hypoxia
- (E) increased intramedullary pressure
The cardiovascular effects of an inhalational anesthetic are evaluated in 10 normal volunteers in the awake resting state and after 15 minutes of constant inspired concentration. Results were analyzed by t-test for paired data and are presented below as mean +/- standard deviation. Based on these data, which of the following conclusions is most valid?
- (A) A decrease in cardiac output would have been evident if more subjects were included in the study
- (B) The anesthetic decreases mean arterial pressure
- (C) The anesthetic does not cause cardiac depression
- (D) The anesthetic is unsafe for patients with coronary after disease
- (E) There is a 95% to 100% chance that the anesthetic increases heart rate
Two months ago a 68-year-old man with insulin-dependent diabetes mellitus had a transurethral resection of the prostate under spinal anesthesia with tetracaine plus epinephrine. He now has numbness and tingling in both feet and disturbance of gait. Physical examination demonstrates stocking-type hypesthesia of both feet and ankles. The most likely diagnosis is
- (A) anterior spinal artery syndrome
- (B) diabetic neuropathy
- (C) adhesive arachnoiditis
- (D) cauda equina syndrome
- (E) peripheral nerve injury from the lithotomy position
Monitoring sensory evoked potentials may be useful in detecting functional derangement of each of the following EXCEPT
- (A) cranial nerve pathways during posterior fossa operations
- (B) motor pathways during anterior cervical discectomy
- (C) dorsal column pathways during operations for spinal tumors
- (D) visual pathways during operations on the sphenoid wing
- (E) cortical pathways during carotid artery operations