10 Random Questions
Each of the following statements about the blood supply of the spinal cord is true EXCEPT:
(A) The anterior spinal artery is made up of branches from the vertebral, intercostal, and iliac arteries
(B) The segmental blood supply of the cord depends upon the location of the arteria radicularis magna (Adamkiewicz)
(C) The posterior spinal arteries supply most of the spinal cord
(D) Obstruction of the inferior vena cava increases blood flow through the epidural venous plexus
(E) The spinal cord is supplied by one anterior spinal artery and two posterior spinal arteries
Reveal Answer
BASIC
Neuro
Which of the following is the most likely effect of intramuscular ketamine used for induction of anesthesia in a 2-year-old child undergoing elective surgery?
(A) Bronchoconstriction
(B) Decreased heart rate
(C) Decreased intracranial pressure
(D) Increased salivation
(E) Respiratory depression
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
Pediatric
Which of the following is decreased by alkalinization of a 1.5% lidocaine solution?
(A) Concentration of free base
(B) Dose required for anesthesia
(C) Duration of anesthesia
(D) Intracellular concentration of ionized lidocaine
(E) Time to onset of anesthesia
Reveal Answer
BASIC
Pharmacology & Pharmacokinetics
Regional & Pain
Which of the following statements concerning autonomic hyperreflexia after spinal cord transection is true?
(A) It occurs within 24 hours after the injury
(B) It occurs with lesions below T10
(C) It is caused by a reflex increase in parasympathetic outflow
(D) It is characterized by paroxysmal hypotension and tachycardia
(E) It is prevented by blocking afferent visceral pathways
Reveal Answer
ADVANCED
General
Microatelectasis 48 hours after abdominal surgery is most consistently manifested by
(A) decreased PaO2
(B) ground glass infiltrate on a roentgenogram of the chest
(C) scattered fine inspiratory rales
(D) increased PaCO2
(E) scattered areas of dullness to chest percussion
Reveal Answer
BASIC
Respiratory & Critical Care
A middle-aged, 70-kg man with a brain tumor is scheduled for an elective craniotomy. Preoperatively, he is alert but papilledema is present. Anesthesia is induced with thiopental 300 mg and succinylcholine 100 mg, followed by tracheal intubation. Immediately following intubation vigorous bucking occurs. The best immediate management would be to
(A) administer succinylcholine 100 mg intravenously
(B) administer fentanyl 500 jug intravenously
(C) hyperventilate with isoflurane 2%
(D) administer thiopental 400 mg intravenously
(E) hyperventilate and administer lidocaine 1 mg/kg intravenously
Reveal Answer
BASIC
General
Neuro
Uterine blood flow is
(A) autoregulated in normal unanesthetized parturients
(B) decreased by the addition of epinephrine 1:200,000 to lidocaine administered epidurally
(C) decreased by intravenous infusion of ritodrine in unanesthetized parturients
(D) increased by administration of magnesium sulfate to patients with preeclampsia
(E) unchanged after paracervical injection of lidocaine without epinephrine
Reveal Answer
ADVANCED
OB
A 56-year-old woman with pulmonary fibrosis is scheduled for pneumonectomy. Which of the following parameters best predicts potential postoperative functional impairment?
(A) Exercise tolerance
(B) Flow-volume loop
(C) Resting arterial blood gas values
(D) Unilateral pulmonary artery occlusion pressure
(E) Vital capacity and FEV,
Reveal Answer
ADVANCED
Respiratory & Critical Care
General
The best indication that a patient is ready for discharge from an outpatient facility after spinal anesthesia is return of
(A) pinprick sensation to the S4-5 dermatome
(B) micturition
(C) plantar flexion
(D) proprioception of the big toe
(E) knee extension
Reveal Answer
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