10 Random Questions
The risk for airway fire during laser resection of a tracheal tumor is decreased by use of
(A) a CO2 laser rather than a YAG laser
(B) an inspired helium concentration greater than 60%
(C) an inspired nitrous oxide concentration greater than 60%
(D) a polyvinylchloride endotracheal tube
(E) halothane in the inspired mixture
Reveal Answer
ADVANCED
Equipment & Physics
A 73-year-old woman with a preoperative serum creatinine concentration of 2.1 mg/dl develops oliguria during enflurane anesthesia. Urine sodium concentration is 10 mEq/L and urine osmolality is 450 mOsm/L. The most likely cause of these findings is
(A) acute renal failure
(B) chronic renal insufficiency
(C) decreased renal perfusion
(D) fluoride nephrotoxicity
(E) intraoperative administration of furosemide
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
Which of the following findings is most likely in an 85-kg 30-year-old man who is breathing spontaneously through 6-mm endotracheal tube?
(A) Decreased PetCO2
(B) Decreased SpO2
(C) Increased minute ventilation
(D) Increased respiratory rate
(E) Increased tidal volume
Reveal Answer
BASIC
Respiratory & Critical Care
Which of the following treatments is LEAST effective in patients with acute herpes zoster?
(A) Acyclovir
(B) Antidepressants
(C) Epidural block
(D) Opioids
(E) Sympathetic nerve block
Reveal Answer
ADVANCED
Regional & Pain
A 50-year-old man with an 80 pack-year history of cigarette smoking has a forced expiratory volume in one second of 1.5 L and a forced vital capacity of 3.5 L. Which of the following statements concerning intraoperative anesthetic management is true?
(A) An I:E ratio of 1:1 will improve carbon dioxide removal more than an I:E ratio of 1:2.5
(B) Antagonism of neuromuscular block will most likely trigger acute bronchospasm
(C) Functional residual capacity will increase during an acute exacerbation of bronchospasm
(D) Induction with ketamine will increase airway resistance
(E) Nitrous oxide is contraindicated
Reveal Answer
BASIC
Respiratory & Critical Care
Each of the following statements about the anatomy of the autonomic nervous system is true EXCEPT:
(A) Preganglionic cell bodies are located in the central nervous system
(B) Postganglionic neurons are located in outlying ganglia
(C) The parasympathetic ganglia are located near their target organs
(D) The adrenal gland is innervated only by the sympathetic nervous system
(E) The parasympathetic nervous system has thoracic and sacral segments
Reveal Answer
BASIC
General
Which of the following best reflects findings of inadequate cerebral perfusion during carotid cross clamping?
(A) Decreased frequency on EEG
(B) Increased latency of brain stem auditory evoked potentials
(C) Increased spectral edge frequency
(D) Jugular bulb oxygen tension of 27 mmHg
(E) Stump pressure of 50 mmHg
Reveal Answer
ADVANCED
Neuro
The carbon dioxide/ventilation response curve
(A) is primarily a measure of the integrity of the peripheral chemoreceptors
(B) shows parallel displacement to the left in the presence of opioids
(C) is linear between a PaCO2 of 20 and 120 mmHg
(D) shows progressive changes in slope with increased doses of halogenated anesthetics
(E) is unaffected by a decrease in PaO2 to 60 mmHg
Reveal Answer
BASIC
Respiratory & Critical Care
The anesthetic concentration necessary to suppress responses to intubation without muscle relaxation is
(A) Increased in pregnancy
(B) increased by premedication with scopolamine
(C) higher than the concentration required for skin incision
(D) lower at high altitudes than at low altitudes
(E) the same as that required for electrocautery of gut
Reveal Answer
Which of the following opioids is vagolytic?
(A) Morphine
(B) Meperidine
(C) Sufentanil
(D) Nalbuphine
(E) Alfentanil
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics