10 Random Questions
Phantom limb pain is an example of which of the following types of pain?
- (A) Central pain
- (B) Nociceptive pain
- (C) Psychosomatic pain
- (D) Sympathetically mediated pain
- (E) Vasospastic pain
Postoperatively, a patient is being mechanically ventilated by a constant-flow, pressure-cycled ventilator with the following initial settings: inspiratory/expiratory (I/E) ratio of 1:2, peak inspiratory pressure (PIP) of 25 cmH2O, and rate of 10/min. One hour later, the I/E ratio is 1:4. Which of the following would ensure that the minute ventilation is the same as that initially set?
- (A) Inflate the endotracheal tube cuff to prevent leakage
- (B) Double the respiratory rate
- (C) Decrease the expiratory pause until the I/E ratio is 1.0
- (D) Increase the PIP until the I/E ratio is 1:2
- (E) Increase the PIP to 50 cmH20
Which of the following is the most appropriate pharmacologic therapy for trigeminal neuralgia?
- (A) Buprenorphine
- (B) Carbamazepine
- (C) Chlorpromazine
- (D) Pentazocine
- (E) Phenelzine
Each of the following decreases hepatic blood flow EXCEPT
- (A) isoflurane anesthesia
- (B) spinal anesthesia
- (C) hypercarbia
- (D) mechanical ventilation
- (E) positive end-expiratory pressure
Compared with halothane, desflurane has which of the following characteristics?
- (A) Greater potency
- (B) A higher boiling point
- (C) Increased blood solubility
- (D) Less airway irritability
- (E) Less biodegradation
Which of the following time concentration curves would be expected in arterial blood following intravenous injection of indocyanine green dye in a 3-year-old child with a small ventricular septal defect?
A 40-year-old man is undergoing open reduction and internal fixation of a fractured femur. During anesthesia with fentanyl, sevoflurane, and oxygen, heart rate decreases to 20 bpm and 6 premature ventricular contractions per minute are noted. No pulse is detected. The most appropriate next step is to
- (A) administer atropine
- (B) administer epinephrine
- (C) administer lidocaine
- (D) apply a transthoracic pacemaker
- (E) start cardiopulmonary resuscitation
The most effective treatment of severe carbon monoxide poisoning in a 2-year-old child is
- (A) intravenous administration of methylene blue
- (B) intravenous administration of thiocyanate
- (C) intravenous administration of thiosulfate
- (D) exchange transfusion
- (E) hyperbaric oxygenation
The decreased duration of action of an intravenous dose of fentanyl compared with an intravenous dose of morphine is best explained by
- (A) greater lipid solubility
- (B) increased hepatic metabolism
- (C) less protein binding
- (D) shorter elimination half-life
- (E) smaller volume of distribution
A 68-year-old patient is undergoing total hip replacement during general anesthesia using positive pressure ventilation and neuromuscular blockade. Intraoperative monitoring shows a gradual decrease in end-tidal CO2, an increase in exhaled tidal volume, and an increase in measured FiO2. Which of the following is the most likely cause of these changes?
- (A) Air entrainment around a deflated endotracheal tube cuff
- (B) Channeling of the exhaled air through the carbon dioxide canister
- (C) Fat embolism
- (D) Inadequate muscle relaxation with spontaneous patient ventilation
- (E) A small hole in the ventilator bellows