Anesthesia Hub -

10 Random Questions

Bupivacaine is more likely than lidocaine to cause refractory cardiac arrest because bupivacaine

(A) has a lower rate of plasma clearance
(B) has a secondary blocking effect on cardiac beta,-adrenergic receptors
(C) dissociates more slowly from sodium channels in cardiac muscle
(D) inhibits spontaneous phase 4 depolarization in pacemaker cells
(E) preferentially blocks calcium channels in Purkinje fibers

BASIC Pharmacology & Pharmacokinetics

Depression of cerebral oxygen requirements below the level required to create an isoelectric EEG can be achieved by

(A) administration of isoflurane
(B) administration of nimodipine
(C) barbiturate coma
(D) hyperventilation
(E) hypothermia

BASIC Neuro

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

BASIC Pharmacology & Pharmacokinetics

With acute carbon monoxide poisoning

(A) P50 is decreased
(B) Pa02 is decreased
(C) arterial oxygen saturation is increased
(D) oxygen-carrying capacity of blood is normal
(E) 2,3-diphosphoglycerate concentration in erythrocytes is increased

A healthy 24-year-old woman is undergoing knee arthroscopy with spinal anesthesia to a level of T4. Which of the following findings is LEAST likely?

(A) Decreased heart rate
(B) Decreased hepatic blood flow
(C) Decreased mean arterial pressure
(D) Decreased tidal volume
(E) Hyperperistalsis

BASIC Regional & Pain

Each of the following is a physiologic effect of intra-aortic balloon pump therapy EXCEPT

(A) decreased peak systolic pressure
(B) increased cardiac output
(C) increased coronary perfusion
(D) increased diastolic pressure
(E) increased total peripheral resistance

BASIC Respiratory & Critical Care Cardiac

A 62-year-old woman with polycythemia vera is scheduled to undergo total knee arthroplasty using a tourniquet. Preoperative hematocrit is 60%. Which of the following is the most appropriate action?

(A) Perform total knee arthroplasty without use of a tourniquet
(B) Preoperative reduction of the hematocrit to 45% to 50%
(C) Prophylactic administration of aprotonin during surgery
(D) Prophylactic administration of epsilon-aminocaproic acid during surgery
(E) Prophylactic administration of low-dose heparin during surgery

During carotid endarterectomy, blood pressure suddenly decreases from 140/90 to 80/50 mmHg. The EKG shows a heart rate of 42 bpm, with normal sinus rhythm and occasional premature ventricular contractions. The most appropriate therapy is intravenous administration of

(A) atropine
(B) epinephrine
(C) isoproterenol
(D) lidocaine
(E) phenylephrine

Leakage current and microshock hazards are eliminated by

(A) an isolation transformer
(B) conductive flooring
(C) a three-wire grounding system
(D) a line-isolation monitor
(E) none of the above

BASIC Equipment & Physics

Which of the following is an effect of ritodrine?

(A) Anisocoria
(B) Hypocalcemia
(C) Hypoglycemia
(D) Hypokalemia
(E) Urinary retention

ADVANCED OB