Anesthesia Hub -

10 Random Questions

When performed with identical doses, which of the following types of regional block is associated with the highest plasma concentration of the drug?

(A) Brachial plexus
(B) Caudal
(C) Intercostal
(D) Subcutaneous infiltration
(E) Thoracic epidural

ADVANCED Regional & Pain

Of the following, the most reliable criterion for adequate clinical reversal of neuromuscular blockade is

(A) return of twitch height to 90% of normal
(B) peak inspiratory force of -20 cmH20
(C) T4:T1 ratio of 0.75 for train of four
(D) normal tidal volume
(E) disappearance of post-tetanic facilitation

BASIC Pharmacology & Pharmacokinetics

Recognized side effects of magnesium sulfate used for the treatment of preeclampsia that would be of anesthetic concern include each of the following EXCEPT

(A) maternal pulmonary edema
(B) neonatal hypotonia
(C) increased maternal sensitivity to succinylcholine
(D) increased maternal sensitivity to vecuronium
(E) maternal hypokalemia

ADVANCED 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

Five minutes after initiating one-lung ventilation using a double-lumen endobronchial tube, a 70-year-old patient has a decrease in Sp02 from 99% to 90%. Tidal volume and respiratory rate are unchanged. Fiberoptic bronchoscopy verifies appropriate positioning of the tube. Which of the following is the most likely cause of the desaturation?

(A) Blood flow to the nondependent lung
(B) Failure of hypoxic pulmonary vasoconstriction in the dependent lung
(C) Inadequate filling of the bronchial cuff
(D) Inadequate minute ventilation
(E) Surgical manipulation of the nondependent lung

ADVANCED General Respiratory & Critical Care

After receiving excessive intraoperative blood replacement, a patient anesthetized with fentanyl, diazepam, and nitrous oxide develops acute pulmonary edema. The drug most likely to help him acutely is

(A) isoflurane
(B) nitroprusside
(C) digoxin
(D) nitroglycerin
(E) furosemide

BASIC Transfusions & Fluids

A patient who is receiving ventilatory support after coronary artery bypass grafting has a PaO2 of 132 mmHg, a PaCO2 of 19 mmHg, and a pH of 7.57. Which of the following is most likely to result from this level of hypocarbia?

(A) Decreased airway resistance
(B) Increased myocardial contractility
(C) Hyperkalemia
(D) Shortened QT interval
(E) Cerebral ischemia

ADVANCED Neuro Cardiac

An 8-year-old child with chronic renal failure is scheduled for an operation to create an arteriovenous fistula. Laboratory studies include: Hemoglobin 6.5 g/dl, Blood gases (breathing air) : PaO2 97 mmHg, PaCO2 29 mmHg, pH 7.30 Sodium 129 mEq/L Potassium 5.5 mEq/L Chloride 101 mEq/L Bicarbonate 15 mEq/L. Before inducing general anesthesia, which of the following abnormalities should be corrected?

(A) Anemia
(B) Metabolic acidosis
(C) Potassium concentration
(D) Anemia, metabolic acidosis, and potassium concentration
(E) None of the above

ADVANCED Respiratory & Critical Care Pediatric

Cholinergic receptor blockade

(A) decreases intraocular pressure
(B) decreases lower esophageal sphincter tone
(C) increases gastrointestinal motility
(D) induces diaphoresis
(E) produces copious secretions

During controlled ventilation, which of the following will cause an increase in end-tidal carbon dioxide tension with a normal waveform on the capnograph?

(A) Bronchospasm
(B) Rapid blood loss
(C) Ventricular fibrillation
(D) Endobronchial migration of the endotracheal tube
(E) Release of a thigh tourniquet

BASIC General