Anesthesia Hub -

10 Random Questions

Following antagonism of a nondepolarizing muscle relaxant with neostigmine, twitch height is normal. To achieve this effect, the percentage of the acetylcholine receptor pool that must be free of muscle relaxant is

(A) 10
(B) 25
(C) 33
(D) 50
(E) 75

BASIC Equipment & Physics Pharmacology & Pharmacokinetics

Compared with epidural morphine, intrathecal morphine produces

(A) better relief of visceral pain
(B) greater loss of analgesia after administration of naloxone
(C) less pruritus
(D) less urinary retention
(E) more respiratory depression

ADVANCED Regional & Pain

During axillary brachial plexus anesthesia, motor block frequently precedes sensory block because of

(A) conduction velocity of motor fibers
(B) myelination of motor fibers
(C) size of motor fibers
(D) presence of septa between motor fibers
(E) peripheral location of motor fibers in the nerve bundle

ADVANCED Regional & Pain

Alveolar stability at varying lung volumes is maintained by

(A) constant surface tension
(B) increased surface tension at low lung volume
(C) decreased surface tension at high lung volume
(D) decreased surface tension at low lung volume
(E) none of the above

BASIC Respiratory & Critical Care

Which of the following statements best describes the decrease in functional residual capacity that accompanies the induction of general anesthesia?

(A) It does not change compliance
(B) It is greater with spontaneous ventilation than with controlled ventilation
(C) It is independent of body position
(D) It is not corrected by application of positive end-expiratory pressure
(E) It occurs within the first 10 minutes of anesthesia

BASIC Respiratory & Critical Care General

Which of the following best explains why neonates are at greater risk than adults for hypothermia during surgical procedures?

(A) Greater body surface area relative to body mass
(B) Greater cutaneous vasodilation at equal MAC concentrations of volatile anesthetics
(C) Greater dependence on shivering to produce heat
(D) Inability to increase metabolic rate
(E) Less insulation by adipose tissue

ADVANCED Pediatric

A 68-year-old woman who is receiving urokinase for deep venous thrombosis and pulmonary emboli requires emergency laparotomy for a bleeding gastric ulcer. Which of the following agents is most appropriate to reverse the effects of urokinase?

(A) Cryoprecipitate
(B) Factor VIII concentrate
(C) Fresh frozen plasma
(D) Platelets
(E) Vitamin K

BASIC Pharmacology & Pharmacokinetics Transfusions & Fluids

Gravid uterine blood flow is

(A) autoregulated
(B) decreased by normotensive epidural analgesia
(C) decreased by uterine contractions
(D) increased with an increase in maternal Pa02
(E) unaffected by alpha-adrenergic agonists

ADVANCED OB

Two days after coronary artery bypass grafting, a 62-year-old man remains sedated, tracheally intubated, and mechanically ventilated with full neuromuscular block. Over the next three hours, Pa02 decreases from 90 to 70 mmHg at an Fl02 of 0.7, peak inspiratory pressure measured proximally in the ventilatory circuit increases from 40 to 66 cmH20, and plateau pressure remains unchanged at 30 cmH20. Which of the following is the most likely cause of these changes?

(A) Adult respiratory distress syndrome
(B) Bronchial mucus plugging
(C) Left ventricular failure
(D) Lobar pneumonia
(E) Tension pneumothorax

The short clinical duration of action of a single dose of fentanyl is a result of its

(A) small volume of distribution
(B) large volume of distribution
(C) low lipid solubility
(D) rapid redistribution
(E) short elimination half-life

BASIC Pharmacology & Pharmacokinetics