10 Random Questions
A 27-month-old, 14-kg infant with intestinal obstruction is anesthetized with nitrous oxide at 1 L/min, oxygen at 0.4 L/min, and halothane at 0.8% using a Bain circuit. Ventilation is controlled at a rate of 30/min. The child's temperature is 39°C, and the PaCO2 is 65 mmHg. Which of the following is most likely?
(A) Malignant hyperthermia
(B) Low gas inflow rate
(C) Low respiratory rate
(D) Pulmonary aspiration of gastric contents
(E) Inaccurate flowmeters
Reveal Answer
BASIC
Equipment & Physics
Pediatric
Measurement of mixed expired carbon dioxide concentration is necessary for the determination of
(A) dead space
(B) lung-thorax compliance
(C) physiologic shunt fraction
(D) diffusing capacity of the lungs
(E) ventilatory response to carbon dioxide
Reveal Answer
Which of the following is a characteristic of VVI pacemakers?
(A) They are inhibited by the R wave
(B) They are triggered by the P wave
(C) They are more likely to precipitate ventricular fibrillation than fixed-rate pacemakers
(D) They are unaffected by unipolar electrocautery
(E) They sense both atrial and ventricular depolarization
Reveal Answer
During the first stage of labor, the pain of uterine contractions and cervical dilatation is transmitted via the spinal cord segments
(A) T6 to L1
(B) T6 to S5
(C) T10 to L1
(D) T10 to S1
(E) T10 to S5
Reveal Answer
ADVANCED
OB
Which of the following is a known effect of propofol?
(A) Decreased amplitude of somatosensory evoked potentials
(B) Induction of malignant hyperthermia
(C) Inhibition of cytochrome P450
(D) Initiation of porphyria
(E) Suppression of adrenocortical function
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
A successful celiac plexus block can be expected to
(A) block parasympathetic fibers to the adrenal medulla
(B) block sympathetic fibers to the sigmoid colon
(C) block somatic fibers to the pancreas
(D) enhance peristalsis
(E) inhibit ejaculation
Reveal Answer
ADVANCED
Regional & Pain
Immediately after a retrobulbar block for cataract surgery, the eye grossly protrudes and the patient has the sensation of pressure in the eye. The most appropriate initial intervention is
(A) hyperventilation
(B) surgical drainage of a hematoma
(C) manual compression of the globe
(D) administration of atropine intravenously
(E) administration of mannitol intravenously
Reveal Answer
ADVANCED
Regional & Pain
Each of the following is a complication of stellate ganglion block EXCEPT
(A) brachial plexus block
(B) diplopia
(C) local anesthetic-induced seizure
(D) recurrent laryngeal nerve palsy
(E) subarachnoid block
Reveal Answer
ADVANCED
Regional & Pain
Which of the following statements concerning the superior laryngeal nerve is true?
(A) It provides sensory innervation to the subglottic surface of the vocal cord
(B) It provides sensory innervation to the inferior surface of the epiglottis
(C) It is a branch of the glossopharyngeal nerve
(D) It is blocked by injection of anesthetic near the lateral portion of the cricothyroid membrane
(E) It is the most commonly injured nerve during thyroid surgery
Reveal Answer
BASIC
Regional & Pain
A 70-kg 78-year-old man undergoing small-bowel resection during anesthesia with isoflurane in oxygen becomes hypotensive and develops frothy pink sputum in the endotracheal tube. Heart rate is 50 bpm, blood pressure is 75/60 mmHg, pulmonary artery occlusion pressure is 22 mmHg, and cardiac output is 1.7 L/min. The most appropriate initial step in management is administration of which of the following?
(A) Albumin
(B) Digoxin
(C) Dopamine
(D) Esmolol
(E) Nitroglycerin
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
General