Cardiopulmonary Bypass Principles Practice Questions

Question 1

Which protein is defective in dilated cardiomyopathy?

Accepted Answer

Dystrophin

Answer

Tropomyosin

Answer

Myosin

Answer

Troponin

Question 2

Heparin interferes with which of the following results of ABG

Accepted Answer

All of the options

Answer

pH

Answer

PO2

Answer

PCO2

Question 3

A postoperative patient with pH 7.25, MAP (mean arterial pressure) 60 mm Hg is treated with?

Accepted Answer

Fluid therapy with CVP monitoring

Answer

Only normal saline

Answer

fluid restriction

Answer

I.V. sodium bicarbonate

Question 4

Which of the following is the LEAST significant risk factor for postoperative pulmonary complications?

Accepted Answer

BMI>30

Answer

Age >70

Answer

Patient with 7 pack years of smoking

Answer

Upper abdominal surgery

Question 5

Which of the following is not a risk factor for postoperative pulmonary complication?

Accepted Answer

Normal BMI (18.5-24.9)

Answer

Age 25-40 years

Answer

Upper abdominal surgery

Answer

Patient with 20 pack years of smoking

Question 6

Which of the following is not true about cardiopulmonary resuscitation (CPR)?

Accepted Answer

Closed chest massage is as effective as open chest massage

Answer

The most common cause of sudden death is ischemic heart disease

Answer

Standard chest massage generally provides less than 15% of normal coronary and cerebral blood flow

Answer

Early defibrillation improves survival rates in ventricular fibrillation

Question 7

All are indications for one-lung ventilation except which of the following?

Accepted Answer

General anesthesia without lung isolation

Answer

Massive hemorrhage in one lung

Answer

Bronchopleural fistula

Answer

Video-assisted thoracoscopic surgery

Question 8

Which is not an obvious advantage of high-flow nasal cannula (HFNC):

Accepted Answer

Hot and Humidification of air

Answer

Bypassing nasopharyngeal dead space

Answer

PEEP

Answer

Decreases need for intubation

Question 9

The position of the patient as shown below is favored for which of the following conditions?

Accepted Answer

Raised ICP

Answer

CHF

Answer

Air embolism

Answer

Neurosurgery

Question 10

A 70-year-old patient with ejection fraction of 25% requires cardioversion for atrial fibrillation in the cardiology suite. During propofol induction (1.5 mg/kg), BP drops from 110/70 to 70/40 mmHg. What is the primary pathophysiological mechanism?

Accepted Answer

Propofol-induced myocardial depression in compromised ventricle

Answer

Coronary steal phenomenon

Answer

Loss of atrial kick after cardioversion

Answer

Excessive preload reduction from venodilation

Cardiopulmonary Bypass Principles — MCQs

Cardiopulmonary Bypass Principles — MCQs

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