Anesthesia Hub -

10 Random Questions

Cerebral blood flow is decreased by each of the following EXCEPT

(A) etomidate
(B) midazolam
(C) nitrous oxide
(D) increased minute ventilation
(E) positive end-expiratory pressure

BASIC Neuro

Which of the following laboratory studies is the best indicator of reversal of the effects of warfarin?

(A) Activated clotting time
(B) Activated partial thromboplastin time
(C) Bleeding time
(D) Plasma fibrinogen concentration
(E) Prothrombin time

Massive venous air embolism occurs in a patient who is undergoing craniotomy in the sitting position with nitrous oxide, oxygen, fentanyl anesthesia. Which of the following changes in end-tidal (ET) concentrations of carbon dioxide, nitrogen, and nitrous oxide are most likely in this patient? (ETCO2, ETN2, ETN2O)

(A) Increased, increased, decreased
(B) Decreased, decreased, increased
(C) Decreased, decreased, decreased
(D) Decreased, increased, decreased
(E) Increased, decreased, decreased

ADVANCED Neuro

Compared with adults, neonates are more likely to become hypoxemic following anesthesia and extubation because of a relatively

(A) higher rate of oxygen consumption
(B) greater sensitivity to neuromuscular blockade
(C) larger Vd/Vt ratio
(D) lower blood pressure
(E) smaller functional residual capacity

ADVANCED Pediatric

Block of each of the following nerves is required for inguinal herniorrhaphy EXCEPT the

(A) genitofemoral
(B) iliohypogastric
(C) ilioinguinal
(D) obturator
(E) twelfth thoracic

ADVANCED Regional & Pain

A 40-year-old man requires brief surgical relaxation after administration of neostigmine and glycopyrrolate for reversal of vecuronium-induced neuromuscular blockade. Succinylcholine 1 mg/kg is administered intravenously. Compared with a patient who has not had prior reversal of neuromuscular blockade, which of the following characterizes the succinylcholine blockade in this patient?

(A) Greater antagonism with calcium chloride
(B) Slower onset
(C) Less profound
(D) Less likelihood of phase II neuromuscular blockade
(E) Prolonged duration

BASIC Pharmacology & Pharmacokinetics

Neuromuscular blockade of the diaphragm is best ensured by monitoring which of the following peripheral muscles?

(A) Adductor pollicis muscle
(B) First dorsal interosseous muscle
(C) Flexor hallucis muscle
(D) Muscles of the hypothenar eminence
(E) Orbicularis oculi muscle

A patient is hyperventilated to a PaC02 of 20 mmHg. Which of the following physiologic parameters is most likely to be increased?

(A) Airway resistance
(B) Myocardial contractility
(C) Oxygen delivery to tissues
(D) Pulmonary vascular resistance
(E) Serum ionized calcium concentration

Which of the following statements concerning monitoring of neuromuscular function during general anesthesia is true?

(A) Facial nerve electrodes underestimate recovery from block, compared with ulnar nerve electrodes
(B) More current is required to depolarize a nerve beneath the negative electrode than beneath the positive electrode
(C) Needle electrodes should be electrically grounded
(D) Supramaximal voltage is 10% higher than the voltage required to elicit pain in the awake patient
(E) The amount of neuromuscular block is underestimated if electrodes are placed on a paretic limb

BASIC Equipment & Physics

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) greater decrease in blood pressure
(B) higher risk for neurotoxicity
(C) higher risk for systemic toxicity
(D) lower risk for spinal cord injury
(E) shorter duration of action

ADVANCED Pediatric Regional & Pain