10 Random Questions
Each of the following conditions causes resistance to nondepolarizing neuromuscular blockade EXCEPT
- (A) chronic severe infections
- (B) major burns
- (C) myotonia congenita
- (D) prolonged immobilization
- (E) upper motor neuron injury
Compared with thiopental, etomidate causes
- (A) greater histamine release
- (B) greater myocardial depression
- (C) greater myoclonic activity
- (D) increased seizure threshold
- (E) less nausea
Desflurane at a stable alveolar concentration of 7%
- (A) causes bradycardia
- (B) decreases cerebrovascular resistance
- (C) degrades in soda lime
- (D) increases systemic vascular resistance
- (E) stimulates the respiratory centers
In an Infant, spinal anesthesia to a sensory level of T8 is achieved with tetracaine administered at the L2-3 interspace. Compared with spinal anesthesia to the same sensory level in an adult, this anesthetic is associated with a
- (A) higher risk for neurotoxicity
- (B) higher risk for systemic toxicity
- (C) lower risk for spinal cord injury
- (D) more significant decrease in blood pressure
- (E) shorter duration of action
A 46-year-old patient is undergoing resection of a posterior fossa tumor with the head elevated 10 cm above the level of the heart. During the procedure, the following changes in vital signs are observed. Which of the following is the most likely cause of the change in heart rate?
- (A) Brain stem compression
- (B) Increased intracranial pressure
- (C) Myocardial ischemia
- (D) Trigeminal nerve retraction
- (E) Venous air embolism
Which of the following changes in pulmonary function best explains the more rapid rate of rise of alveolar concentration of volatile anesthetics in pregnant women than in nonpregnant women?
- (A) Decreased functional residual capacity
- (B) Decreased dead space ventilation
- (C) Increased cardiac output
- (D) Increased oxygen consumption
- (E) Increased pulmonary venous admixture
Epinephrine is less effective in prolonging epidural anesthesia with bupivacaine than epidural anesthesia with lidocaine because
- (A) peak bupivacaine concentrations are decreased less than peak lidocaine concentrations
- (B) the acidic pH of epinephrine decreases the concentration of the nonionized bupivacaine
- (C) bupivacaine produces more vasoconstriction than lidocaine
- (D) the duration of action of bupivacaine is independent of local blood flow
- (E) bupivacaine antagonizes the vasoconstrictor activity of epinephrine
During attempted awake intubation, the patient gags when the laryngoscope presses on the base of the tongue. Which of the following cranial nerves is responsible for the afferent limb of this reflex?
- (A) Trigeminal
- (B) Facial
- (C) Glossopharyngeal
- (D) Vagus
- (E) Hypoglossal
In the supraclavicular region, the brachial plexus
- (A) is anterior to the apex of the pleura
- (B) is anterior to the subclavian artery
- (C) is posterior to the medial scalene muscle
- (D) is enclosed in a sheath with the subclavian vein
- (E) no longer contains fibers from the Tl nerve root
A patient undergoes differential spinal block for evaluation of persistent foot pain. If the pain returns coincident with a decrease in skin temperature, which of the following is the most appropriate conclusion?
- (A) A somatic origin is ruled out
- (B) The patient has causalgia
- (C) The patient has peripheral vascular disease
- (D) The pain is caused by central neuropathy
- (E) Lumbar sympathetic blocks are indicated