Anesthesia Hub -

10 Random Questions

An 86-kg, 67-year-old man is undergoing a second coronary artery bypass operation. Five minutes after administration of protamine, blood pressure is 69/40 mmHg, pulmonary artery pressure is 65/42 mmHg, and the cardiac output measured by thermodilution is 2.3 L/min. Which of the following is the most likely cause of these findings?

(A) Allergy to fish
(B) Increased plasma thromboxane concentration
(C) Increased plasma histamine concentration
(D) Insulin-dependent diabetes mellitus
(E) IgE antibodies to protamine

Which of the following is the most important function of temperature compensation in anesthetic vaporizers?

(A) Compensation for changes in the specific heat of the anesthetic during vaporization
(B) Delivery of diluent gas at a constant temperature regardless of flow rate
(C) Increase of bypass flow when the vaporizer is cooled by high fresh gas flow
(D) Maintenance of constant anesthetic vapor output over a range of vaporizer temperatures
(E) Maintenance of constant vapor concentrations at low flow rates

BASIC Equipment & Physics

Mivacurium-induced neuromuscular blockade is prolonged for the greatest period of time in patients who have which of the following conditions?

(A) Ethanol-induced hepatitis
(B) Hemiplegia
(C) Pseudocholinesterase deficiency
(D) Renal insufficiency
(E) Thermal burns

BASIC Pharmacology & Pharmacokinetics

A 50-year-old man with an 80 pack-year history of cigarette smoking has a forced expiratory volume in one second of 1.5 L and a forced vital capacity of 3.5 L. Which of the following statements concerning intraoperative anesthetic management is true?

(A) An I:E ratio of 1:1 will improve carbon dioxide removal more than an I:E ratio of 1:2.5
(B) Antagonism of neuromuscular block will most likely trigger acute bronchospasm
(C) Functional residual capacity will increase during an acute exacerbation of bronchospasm
(D) Induction with ketamine will increase airway resistance
(E) Nitrous oxide is contraindicated

BASIC Respiratory & Critical Care

A woman with chronic obstructive pulmonary disease is extubated and minimally responsive after isoflurane anesthesia. She is receiving oxygen 6 L/min through a face mask. Respirations are 10/min, PaO2 is 68 mmHg, PaCO2 is 54 mmHg, and pH is 7.28. The most likely cause of the respiratory acidemia is

(A) blunted sensitivity to low pH in the medullary respiratory center
(B) chronic carbon dioxide retention
(C) decreased lung volume from supine positioning
(D) depression of carotid body chemoreceptors by halothane
(E) suppression of hypoxic ventilatory drive by supplemental oxygen

ADVANCED Respiratory & Critical Care

A 10-week-old infant born at 28 weeks gestation is scheduled for elective repair of bilateral inguinal hernias. It is most appropriate to

(A) delay the operation until the infant is 6 months old
(B) transfuse blood preoperatively if hemoglobin concentration is 9 g/dl
(C) avoid tracheal intubation
(D) limit inspired oxygen concentration to less than 50%
(E) monitor for apnea for 24 hours postoperatively

ADVANCED Pediatric

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

The primary determinant of the duration of an intravenous regional block sufficient to provide surgical anesthesia of an upper extremity is

(A) duration of tourniquet inflation
(B) capacitance of the venous system of the extremity
(C) local anesthetic agent injected
(D) volume of anesthetic solution injected
(E) method of exsanguinating the arm

ADVANCED

Which of the following statements concerning the effects of glycopyrrolate is true?

(A) It decreases gastric pH
(B) It causes bronchoconstriction
(C) It decreases lower esophageal sphincter tone
(D) It does not prevent succinylcholine-induced bradycardia
(E) It causes a central anticholinergic syndrome

BASIC Pharmacology & Pharmacokinetics

Each of the following findings is characteristic of chronic reflex sympathetic dystrophy of the extremities EXCEPT

(A) allodynia
(B) bone demineralization
(C) edema
(D) hyperpathia
(E) warm skin