10 Random Questions
During induction of anesthesia, a patient is breathing isoflurane from a semiclosed circle absorber system. The temperature-compensated vaporizer is set to deliver isoflurane 1.5%. Which of the following will result in the lowest inspired concentration of isoflurane?
- (A) Doubling the length of circle system hoses
- (B) Decreasing the barometric pressure
- (C) Changing from rubber to plastic breathing hoses
- (D) Decreasing fresh gas flow
- (E) Exhaustion of the soda lime
A 55-year-old man is undergoing craniotomy in the sitting position. Mean arterial pressure is 75 mmHg; arterial blood gas values are PaCO2 41 mmHg and pH 7.37. End-tidal CO2 is 7 mmHg. Which of the following is the most likely cause of the increased PaCO2 to PetCO2 gradient?
- (A) Decreased cardiac output
- (B) Endobronchial intubation
- (C) Hyperinflation of the lungs
- (D) Partial disconnect of the capnograph sample tubing
- (E) Venous air embolism
A patient with a fasting blood glucose concentration of 100 mg/dL undergoes a four-hour operation under general anesthesia without intraoperative administration of glucose. On emergence the most likely finding will be
- (A) marked hypoglycemia
- (B) mild hypoglycemia
- (C) normoglycemia
- (D) mild hyperglycemia
- (E) marked hyperglycemia
A 40-year-old woman with chronic renal failure is undergoing revision of an arteriovenous shunt with general anesthesia. The capnographic waveform was obtained during spontaneous ventilation 20 minutes after administration of succinylcholine and tracheal intubation. Which of the following is the most likely cause of these findings?
- (A) Leaking endotracheal cuff
- (B) Channeling of soda lime
- (C) Light anesthesia
- (D) Metabolic acidosis
- (E) Residual neuromuscular block
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
- (E) Release of a thigh tourniquet
Positive end-expiratory pressure is effective for treatment of hypoxia resulting from each of the following EXCEPT
- (A) cardiogenic pulmonary edema
- (B) intraoperative Trendelenburg position
- (C) lateral position during total hip replacement
- (D) lung contusion
- (E) status asthmaticus
A 25-year-old woman is receiving magnesium sulfate for eclampsia at 36 weeks' gestation. Each of the following is a maternal effect of this treatment EXCEPT
- (A) sedation
- (B) sensitization to depolarizing muscle relaxants
- (C) sensitization to nondepolarizing muscle relaxants
- (D) decreased uterine blood flow
- (E) loss of deep tendon reflexes prior to significant cardiac dysfunction
Which of the following is the most likely cause of postural headache following spinal anesthesia?
- (A) Meningeal traction
- (B) Parasympathetic (vagal) block
- (C) Sympathetic block-induced hypotension
- (D) Transtentorial cerebral herniation
- (E) Vasopressin-induced vasoconstriction
A radial artery catheter is to be used for blood pressure measurement during a sitting craniotomy. When zeroing the transducer, which of the following describes the best levels for placement of the transducer and opening of the system to air? (Transducer, Opening to Air)
- (A) Head Wrist
- (B) Head Head
- (C) Head Heart
- (D) Heart Heart
- (E) Heart Wrist
Which of the following statements concerning the pharmacokinetics of nondepolarizing muscle relaxants is true?
- (A) Drugs with a longer duration of action depend on the liver for excretion
- (B) Drugs with a shorter duration of action depend primarily on redistribution for recovery
- (C) Onset of action is independent of dose
- (D) Recovery rate parallels the decrease in plasma relaxant concentration
- (E) The shorter the duration of action, the faster the onset