Anesthesia Hub -

10 Random Questions

A 21-year-old athlete has laryngospasm following extubation after undergoing repair of an inguinal hernia during general anesthesia. Bag and mask ventilation relieves the patient's symptoms. In the PACU 15 minutes later, he has dyspnea; Sp02 is 85% at an Fl02 of .40. Which of the following is the most likely cause?

(A) Atelectasis
(B) Decreased cardiac output
(C) Pulmonary edema
(D) Pulmonary embolism
(E) Residual paralysis

If minute ventilation is held constant, which of the following is LEAST likely to alter PaCO2?

(A) General anesthesia
(B) Hypothermia
(C) Increased dead space
(D) Increased pulmonary shunt
(E) Induced hypotension

BASIC Respiratory & Critical Care

Which of the following drugs increases gastric pH while decreasing gastric volume?

(A) Glycopyrrolate
(B) Magnesium trisilicate
(C) Metoclopramide
(D) Ranitidine
(E) Sodium citrate

A Fluotec vaporizer is set to administer halothane 4% using a fresh gas flow of 4 L/min. If the diluent gas flow is increased to 8 L/min, and at the same time the room temperature increases from 20 to 25°C, the approximate concentration of halothane delivered to the patient would be

(A) 2%
(B) 2.5%
(C) 3%
(D) 4%
(E) 5%

BASIC Equipment & Physics

During carotid endarterectomy, which of the following EEG patterns is most suggestive of cerebral ischemia?

(A) Ipsilateral spike-and-wave activity
(B) Bilateral change from beta to alpha rhythm
(C) Ipsilateral increase in beta activity
(D) Ipsilateral decrease in the spectral edge frequency from 10 to 4 Hz
(E) Bilateral increase in the spectral edge frequency from 8 to 15 Hz

Which of the following statements concerning use of a Bain circuit is true?

(A) Fresh gas flow can be as low as the patient's minute ventilation
(B) Heat conservation is better than with a circle system
(C) Lower flows can be used with controlled ventilation than with spontaneous ventilation
(D) Lower fresh gas flows can be used than with a Jackson-Rees system
(E) The concentration of inspired vapors can be changed rapidly

BASIC Equipment & Physics

Local anesthetics block nerve conduction by

(A) closing calcium channels
(B) decreasing intracellular calcium concentration
(C) decreasing potassium conductance
(D) causing extrusion of intracellular potassium
(E) inhibiting cellular influx of sodium

BASIC Pharmacology & Pharmacokinetics

Following transfusion of packed red blood cells during general anesthesia, the patient's blood pressure decreases, heart rate and temperature increase, and hemoglobinuria and diffuse oozing are observed. Which of the following is the most appropriate first step in management?

(A) Administration of hydrocortisone
(B) Administration of fresh frozen plasma
(C) Administration of epsilon-aminocaproic acid
(D) Rapid infusion of crystalloid
(E) Transfusion of platelet concentrates

BASIC Transfusions & Fluids General

Each of the following indicates a hemolytic transfusion reaction in an anesthetized patient EXCEPT

(A) bleeding diathesis
(B) wheezing
(C) hypotension
(D) hemoglobinuria
(E) decreased serum haptoglobin concentration

ADVANCED Transfusions & Fluids

A 52-year-old man develops oliguria 24 hours after left hemicolectomy. Urinalysis shows a specific gravity of 1.028, an osmolality of 650 mOsm/L, and a sodium concentration of 10 mEq/L. Which of the following is the most likely diagnosis?

(A) Acute tubular necrosis
(B) Hypoaldosteronism
(C) Hypovolemia
(D) Interstitial renal disease
(E) Obstructive uropathy