Anesthesia Hub -

10 Random Questions

During an operation with cardiopulmonary bypass using a bubble oxygenator, the risk for systemic gas embolization increases when

(A) a filter greater than 20 microns is used in the arterial infusion tubing
(B) gas flow to the oxygenator is decreased below 3 L/min
(C) the operation is a mitral valve replacement
(D) the blood level in the oxygenator reservoir exceeds 1 liter
(E) ventricular fibrillation occurs

A 76-year-old man has a leaking abdominal aortic aneurysm. His blood pressure and pulse have remained stable for 15 minutes at 90/60 mmHg and 130 bpm, respectively. His hemoglobin concentration is 11 g/dl, and the EKG shows a left bundle branch block. Induction of anesthesia should proceed

(A) after a pulmonary artery catheter has been inserted and the pulmonary artery occlusion pressure is greater than 7 mmHg
(B) when the pulse has decreased below 130 bpm from the rapid transfusion of blood
(C) when systolic blood pressure has increased to more than 120 mmHg from the rapid infusion of lactated Ringer's solution
(D) immediately on arrival in the operating room
(E) when circulatory signs deteriorate or cease to improve with rapid volume expansion

ADVANCED General

Block of the superficial cervical plexus is performed at which location?

(A) At the midposterior border of the sternocleidomastoid muscle
(B) In the interscalene groove
(C) Over the mastoid process
(D) Over the transverse process of C4
(E) Over Chassaignac's tubercle

ADVANCED Regional & Pain

Which of the following is the primary factor regulating normal coronary blood flow?

(A) Aortic diastolic pressure
(B) Coronary perfusion pressure
(C) Heart rate
(D) Myocardial oxygen consumption
(E) Systolic wall tension

BASIC Cardiac

A comatose 40-year-old man is to undergo evacuation of an acute subdural hematoma. His left pupil is dilated and blood is present behind the left tympanic membrane. Each of the following is an acceptable intervention EXCEPT

(A) application of 5 cm H20 positive end-expiratory pressure
(B) blind nasotracheal intubation
(C) use of isoflurane
(D) use of nitrous oxide
(E) use of succinylcholine

During the first stage of labor, the pain of uterine contractions and cervical dilatation is transmitted via the spinal cord segments

(A) T6 to L1
(B) T6 to S5
(C) T10 to L1
(D) T10 to S1
(E) T10 to S5

ADVANCED OB

If administered epidurally in equipotent doses, which of the following opioids will produce analgesia over the greatest number of dermatomes?

(A) Fentanyl
(B) Hydromorphone
(C) Meperidine
(D) Morphine
(E) Sufentanil

The acute onset of hypotension without a decrease in mixed venous oxygen saturation is most likely associated with the onset of

(A) hemorrhage
(B) myocardial infarction
(C) pulmonary edema
(D) pulmonary embolus
(E) sepsis

ADVANCED Respiratory & Critical Care General

A patient who is scheduled for emergency laparotomy for bowel obstruction has had oliguria for three hours. She has had hypertension for 10 years. Which of the following laboratory findings would indicate preoperative fluid challenge?

(A) Urine osmolality: 300 mOsm/L
(B) Urine specific gravity: 1.015
(C) Urine sodium concentration: 35 mmol/L
(D) Fractional excretion of sodium: 0.5
(E) Ratio of urine-to-plasma creatinine concentrations: 8

ADVANCED General

Reduction of fire hazards during laser surgery of the airway is best accomplished by use of

(A) continuous mode laser emissions
(B) a nitrous oxide/opioid/relaxant anesthetic technique
(C) a polyvinylchloride endotracheal tube and cuff
(D) topical lidocaine
(E) saline-filled sponges over exposed tissues

ADVANCED Equipment & Physics General