Anesthesia Hub -

10 Random Questions

During induction of anesthesia in a 70-year-old man with aortic stenosis, the blood pressure decreases from 140/ 80 to 70/45 mmHg as the cardiac rhythm changes from normal sinus at 70 bpm to junctional at 120 bpm. The most appropriate initial therapy would be

(A) cardioversion
(B) esmolol
(C) fluid bolus
(D) phenylephrine
(E) verapamil

BASIC Pharmacology & Pharmacokinetics General Cardiac

Block of the superficial cervical plexus is performed at which location?

(A) At the midposterior border of the sternocleidomastoid muscle
(B) In the interscalene groove
(C) Over the mastoid process
(D) Over the transverse process of C4
(E) Over Chassaignac's tubercle

ADVANCED Regional & Pain

A 26-year-old patient with multiple trauma is admitted to the intensive care unit postoperatively. The early development of polyuria, hypotension, low urine sodium excretion, high serum osmolality, and normal serum creatinine concentration is best explained by

(A) adrenal insufficiency
(B) fluoride-induced high-output renal failure
(C) inappropriate ADH secretion
(D) intraoperative fluid overload
(E) posterior pituitary insufficiency

ADVANCED General

Which of the following statements concerning hyperkalemia after succinylcholine administration to a patient with a spinal cord injury is true?

(A) It is unlikely to occur if the lesion is located below T6
(B) It is unlikely to occur within 24 hours of the injury
(C) It is unlikely to occur more than 60 days after the initial injury
(D) It is prevented by pretreatment with small doses of a nondepolarizing agent
(E) It is decreased in magnitude by pretreatment with calcium chloride

BASIC Pharmacology & Pharmacokinetics

Evaluation of a postoperative neurologic deficit discloses inability to oppose the thumb and little finger, weakness of abduction of the thumb, and loss of flexion of the distal phalanx of the index finger. This problem is most likely related to

(A) paresthesia occurring during an interscalene brachial plexus block
(B) attempted radial artery cannulation at the wrist
(C) inadequate padding under the elbow
(D) attempted venipuncture in the antecubital fossa
(E) abduction of the upper humerus against an "ether screen"

The human immunodeficiency virus (HIV)

(A) is inactivated by irradiation
(B) is transmitted by cryoprecipitate
(C) is transmitted by 5% albumin
(D) passes through intact dermis
(E) provokes an immediate antibody response

BASIC General

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

ADVANCED Respiratory & Critical Care OB

Each of the following changes is expected with deliberate hypothermia EXCEPT

(A) decreased unloading of oxygen from hemoglobin
(B) a 5% decrease in MAC for each 1°C decrease in temperature
(C) increased arterial oxygen and carbon dioxide contents
(D) a 50% decrease in cerebral metabolic rate at 28°C
(E) spike and dome EEG activity at temperatures below 30°C

BASIC General Cardiac

A patient receiving mechanical ventilation with oxygen 60% postoperatively has a PaO2 of 160 mmHg and a PaCO2 of 38 mmHg. One hour later, with mechanical ventilation unchanged, the PaO2 is 150 mmHg and PaCO2 is 48 mmHg. The most likely cause of these changes is

(A) metabolic acidosis
(B) pulmonary embolism
(C) increased body temperature
(D) interstitial pulmonary edema
(E) aspiration pneumonia

BASIC Respiratory & Critical Care General

One week after sustaining third-degree burns over 40% of his body surface area, a patient requires general anesthesia for debridement and skin grafting. Which of the following responses to neuromuscular blockers is most likely?

(A) Clinically insignificant increases in serum potassium concentration after administration of succinylcholine 1 mg/kg
(B) Increased risk of hyperkalemia after administration of succinylcholine 1 mg/kg
(C) Increased sensitivity to vecuronium
(D) Laudanosine toxicity after administration of atracurium 0.4 mg/kg
(E) Normal serum potassium concentration if administration of succinylcholine is preceded by d-tubocurarine 3 mg

ADVANCED Pharmacology & Pharmacokinetics