10 Random Questions
The drug that causes dose-dependent EEG evidence of both central nervous system excitation and depression is
- (A) lidocaine
- (B) halothane
- (C) thiopental
- (D) nitrous oxide
- (E) midazolam
In patients with pregnancy-induced hypertension, magnesium sulfate is most likely to
- (A) decrease maternal heart rate
- (B) decrease sensitivity to relaxants
- (C) decrease succinylcholine-induced fasciculations
- (D) prevent hypokalemia
- (E) produce fetal bradycardia
The two E oxygen cylinders on an anesthesia machine have pressure readings of 1100 psi each. At an oxygen flow of 3 L/min, there will be sufficient oxygen for approximately
- (A) 2.5 hours
- (B) 3.5 hours
- (C) 5.5 hours
- (D) 7 hours
- (E) 8 hours
Reduction of fire hazards during laser surgery of the airway is best accomplished by use of
- (A) continuous mode laser emissions
- (B) a nitrous oxide/opioid/relaxant anesthetic technique
- (C) a polyvinylchloride endotracheal tube and cuff
- (D) topical lidocaine
- (E) saline-filled sponges over exposed tissues
Compared with normal adults, which of the following characteristics of neonates best explains the more rapid inhalation induction in neonates?
- (A) Greater cardiac index
- (B) Greater metabolic rate
- (C) Greater perfusion of vessel-rich tissues
- (D) Greater ratio of alveolar ventilation to functional residual capacity
- (E) Less lean body mass
Brain stem auditory evoked potentials are most likely to be absent during which of the following?
- (A) Anesthesia with 1.5 MAC isoflurane
- (B) Barbiturate coma
- (C) Hypotension to a mean arterial pressure of 50 mmHg
- (D) Surgical retraction of the temporal lobe
- (E) Surgical traction on the pons
Which of the lines shown in the graph illustrates the relationship of hematocrit and oxygen transport?
- (A) Line A
- (B) Line B
- (C) Line C
- (D) Line D
- (E) Line E
When performed with identical doses, which of the following types of regional block is associated with the highest plasma concentration of the drug?
- (A) Brachial plexus
- (B) Caudal
- (C) Intercostal
- (D) Subcutaneous infiltration
- (E) Thoracic epidural
A 30-year-old primiparous woman delivered a healthy infant by cesarean section during uneventful spinal anesthesia with tetracaine 10 mg in 2 ml of 5% dextrose solution. Twelve hours after delivery she has bilateral loss of pain and temperature sensibility, but not touch, below T8 and paralysis of both legs. The most likely cause of this complication is
- (A) chemical arachnoiditis
- (B) injection of tetracaine into the spinal cord
- (C) demyelination of the posterior tracts
- (D) thrombosis of the anterior spinal artery
- (E) cord transection from spondylolisthesis
Which of the following shaded areas most accurately represents the dead space of a properly functioning circle system?
