Anesthesia Hub -

10 Random Questions

Which of the following statements concerning pulmonary function in patients with pulmonary fibrosis is true?

(A) Diffusion capacity is decreased
(B) Pulmonary artery diastolic-to-occlusion pressure gradients are normal
(C) Ventilation-perfusion relationships are normal
(D) Static pulmonary compliance is unchanged
(E) Mechanical ventilation with slow rate and large tidal volume is optimal

ADVANCED Respiratory & Critical Care

Which of the following is the primary physiologic response in a neonate exposed to a hypothermic environment?

(A) Hyperventilation
(B) Increased 2,3-DPG concentration in erythrocytes
(C) Metabolism of brown fat
(D) Shivering
(E) Vasoconstriction

ADVANCED Pediatric

Each of the following conditions can be accurately evaluated with transesophageal echocardiography EXCEPT

(A) intimal tear at the aortic arch
(B) intracardiac air
(C) left atrial thrombus
(D) patent foramen ovale
(E) right atrial myxoma

ADVANCED Cardiac

A healthy, spontaneously breathing, supine, anesthetized patient has an arterial to end-tidal carbon dioxide tension difference of 3 mmHg. Following institution of mechanical ventilation the value increases to 12 mmHg. The most likely cause of this change is

(A) cephalad displacement of the diaphragm
(B) decreased production of carbon dioxide
(C) increased cardiac output
(D) increased shunting of blood through dependent lung zones
(E) increased ventilation of nondependent lung zones

BASIC Respiratory & Critical Care

Which of the following statements concerning use of amitriptyline to treat chronic pain is true?

(A) It acts primarily via opioid receptors
(B) It increases serotonin levels in the brain
(C) It is rarely effective for postherpetic neuralgia
(D) Onset of action occurs after four to six weeks of treatment
(E) Response depends on reversal of depression

ADVANCED Regional & Pain

Each of the following values is associated with acute tubular necrosis EXCEPT

(A) urine osmolality of 200 mOsm/kg
(B) urine sodium concentration of 15 mEq/L
(C) urine specific gravity of 1.009
(D) urine/serum osmolarity ratio of 1.2
(E) fractional excretion of sodium of 4%

BASIC General

Two months ago a 68-year-old man with insulin-dependent diabetes mellitus had a transurethral resection of the prostate under spinal anesthesia with tetracaine plus epinephrine. He now has numbness and tingling in both feet and disturbance of gait. Physical examination demonstrates stocking-type hypesthesia of both feet and ankles. The most likely diagnosis is

(A) anterior spinal artery syndrome
(B) diabetic neuropathy
(C) adhesive arachnoiditis
(D) cauda equina syndrome
(E) peripheral nerve injury from the lithotomy position

ADVANCED General Regional & Pain

Compared with a normal child, which of the following is expected during inhalation induction in a child with a 2:1 left-to-right intracardiac shunt?

(A) Decreased rate of rise of alveolar anesthetic tension
(B) Decreased anesthetic concentration in pulmonary artery blood
(C) Decreased cerebral blood flow
(D) Increased anesthetic concentration in vena cava blood
(E) No difference in time for anesthetic induction

ADVANCED General Pediatric

Pancuronium blocks the bradycardic effect of fentanyl by a direct effect on

(A) beta-adrenergic receptors
(B) cardiac muscarinic receptors
(C) carotid baroreceptors
(D) central vagal nuclei
(E) sympathetic ganglia

BASIC Pharmacology & Pharmacokinetics

During anesthesia with nitrous oxide, oxygen, and a relaxant, the patient's lungs are being mechanically ventilated and there is a heated humidifier in the circuit. The most likely cause of an apparent increase in inspired oxygen concentration is

(A) a hole in the ventilator bellows
(B) backflow of fresh gas because of resistance in the humidifier
(C) decreased oxygen utilization by the patient
(D) heat damage to the oxygen sensor
(E) water condensation on the oxygen sensor

BASIC Equipment & Physics