Anesthesia Hub -

10 Random Questions

What is the expected mixed venous oxygen tension, in mmHg, in a normal adult after breathing 100% oxygen for 10 minutes?

(A) 573
(B) 563
(C) 150
(D) 95
(E) 45

A 36-year-old woman who undergoes peritoneal dialysis for chronic renal failure requires emergency surgical exploration for bowel obstruction. Serum creatinine concentration is 9.8 mg/dl and BUN concentration is 124 mg/dl. The most likely abnormality of coagulation is

(A) decreased euglobulin lysis time
(B) decreased platelet count
(C) prolonged activated partial thromboplastin time
(D) prolonged bleeding time
(E) prolonged prothrombin time

BASIC General

Which of the following is increased in patients with chronic anemia?

(A) Mixed venous oxygen content
(B) P50
(C) Pulmonary vascular resistance
(D) Systemic vascular resistance
(E) Blood viscosity

BASIC General

Which of the following is most likely to increase hepatic blood flow during general anesthesia?

(A) Addition of positive end-expiratory pressure
(B) Discontinuation of isoflurane and administration of enflurane
(C) Increased PaCO2
(D) Moderate controlled hypotension
(E) Subarachnoid administration of morphine

BASIC General

A patient has a heart rate of 110 bpm one year after heart transplantation. His tachycardia is most likely the result of

(A) altered baroreceptor sensitivity
(B) cardiac denervation
(C) compensation for a fixed stroke volume
(D) cyclosporine
(E) prednisone

ADVANCED Cardiac

Following pneumonectomy, a paralyzed patient being mechanically ventilated has the following arterial blood gas values: PaO2 71 mmHg, PaCO2 55 mmHg, pH 7.29. SvO2 is 45%. The most likely explanation for this SvO2 is

(A) decreased red cell mass
(B) high cardiac output
(C) hypothermia
(D) peripheral left-to-right arteriovenous shunt
(E) ventilation / perfusion mismatch

ADVANCED Respiratory & Critical Care General

During craniotomy in the sitting position, end-tidal carbon dioxide tension suddenly decreases. Ventilatory excursion of the chest is normal. Further evaluation is most likely to show a decrease in

(A) alveolar-to-arterial oxygen tension difference
(B) alveolar-to-arterial carbon dioxide tension difference
(C) dead space ventilation
(D) pulmonary artery pressure
(E) pulmonary artery occlusion pressure

ADVANCED Respiratory & Critical Care Neuro

Immediately following radical prostatectomy, ketorolac administered for analgesia

(A) aggravates ileus and bladder spasm
(B) increases platelet adhesion
(C) is ideally suited for patient-controlled analgesia
(D) mediates its effects via kappa opioid receptors
(E) produces cyclooxygenase inhibition

When succinylcholine is administered intravenously to infants, intragastric pressure

(A) is usually unchanged
(B) increases to a peak of 30 cmH20 within two minutes
(C) increases because of abdominal muscle fasciculations
(D) increases because of an acetylcholine-like effect on the vagus nerve
(E) peaks and subsides within five minutes

ADVANCED Pharmacology & Pharmacokinetics Pediatric

Compared with lidocaine, bupivacaine is more likely to cause dysrhythmias because it

(A) enhances potassium-hydrogen ion exchange
(B) is less soluble in lipids
(C) produces more prolonged block of sodium channels
(D) sensitizes the myocardium to catecholamines
(E) sustains calcium channels open

BASIC Pharmacology & Pharmacokinetics Regional & Pain