Anesthesia Hub -

10 Random Questions

A 30-year-old woman underwent emergency cesarean delivery under general anesthesia at 36 weeks' gestation because of preeclampsia. Two hours after the operation, she is still intubated and apneic and cannot be aroused. Deep tendon reflexes are 1+. With mechanical ventilation at an FiO2 of 0.4, PaO2 is 130 mmHg, PaCO2 is 32 mmHg, pH is 7.45, and base excess is -0.6. The most likely cause is

(A) hypovolemic shock
(B) intracerebral hemorrhage
(C) nitroprusside toxicity
(D) overdose of magnesium sulfate
(E) pituitary necrosis

ADVANCED OB

Which of the following characteristics of local anesthetics is associated with long duration of action?

(A) High degree of lipid solubility
(B) High degree of protein binding
(C) High molecular weight
(D) High pKa
(E) Presence of ester linkage

BASIC Pharmacology & Pharmacokinetics

Which of the following statements concerning the risk of acquiring hepatitis from a blood transfusion is true?

(A) Most patients with post-transfusion hepatitis become clinically jaundiced
(B) Most cases of post-transfusion hepatitis are caused by the hepatitis B virus
(C) The risk for hepatitis is less than the risk for AIDS
(D) The risk for post-transfusion hepatitis is less than 1% per unit transfused
(E) The incidence of post-transfusion hepatitis has remained unchanged over the past decade

BASIC Transfusions & Fluids

Two opened oxygen cylinders, one full and one empty, are attached to an anesthesia machine. The check valve to the empty cylinder fails. This is expected to result in

(A) activation of the fail-safe device
(B) cessation of oxygen flow to the anesthesia circuit
(C) filling of the empty cylinder with a mixture of all gases supplied to the anesthesia machine
(D) increase in the temperature of the empty cylinder
(E) interruption of gas delivery from the central oxygen source

BASIC Equipment & Physics

Which of the following is the primary factor regulating normal coronary blood flow?

(A) Aortic diastolic pressure
(B) Coronary perfusion pressure
(C) Heart rate
(D) Myocardial oxygen consumption
(E) Systolic wall tension

BASIC Cardiac

Which of the following will most closely mimic the effects of stellate ganglion block?

(A) Axillary perivascular block with 25 mL of 1.5% lidocaine
(B) Cervical nerve block at C2-5 with 2 mL of 1.5% lidocaine
(C) Supraclavicular block at the level of the first rib with 25 mL of 1.5% lidocaine
(D) Block of the median, radial, ulnar, musculocutaneous, and intercostobrachial nerves
(E) Excision of thoracic sympathetic ganglia Tl-4

ADVANCED Regional & Pain

Following a vaginal hysterectomy in the lithotomy position under general anesthesia, a patient has numbness of the lateral aspect of the left calf and medial half of the dorsum of the left foot. On physical examination she has footdrop and the toes cannot be extended. Which nerve is most likely to be involved?

(A) Common peroneal nerve
(B) Deep peroneal nerve
(C) Posterior tibial nerve
(D) Saphenous nerve
(E) Sciatic nerve

ADVANCED Regional & Pain

Which of the following complications is the primary cause of neurologic deficit following carotid endarterectomy?

(A) Global hypoperfusion
(B) Hypertension
(C) Hypotension
(D) Improper shunt insertion
(E) Thromboembolism

ADVANCED General

Unilateral or bilateral diaphragmatic paralysis is a complication of each of the following EXCEPT

(A) surgical ligation of a patent ductus arteriosus
(B) use of pericardial ice-slush for topical cardiac hypothermia
(C) stellate ganglion block
(D) interscalene brachial plexus block
(E) C6 cervical fracture-dislocation

ADVANCED General

Which of the following laboratory studies is most reliable in differentiating prerenal azotemia from acute tubular necrosis?

(A) Creatinine clearance
(B) Fractional excretion of sodium
(C) Urine/plasma urea ratio
(D) Urine sodium content
(E) Urine specific gravity