Your-Doctor Multiple Choice Questions (MCQ)

Category: Surgery--->Physiologic Monitoring of the Surgical Patient
Page: 1

Question 1#Print Question

The point of critical oxygen delivery (DO):

a. Represents the transition from supply-independent to supply-dependent oxygen uptake and is decreased in sepsis
b. Represents the minimal rate of oxygen delivery needed for aerobic metabolism and is decreased in sepsis
c. Represents the transition from supply-independent to supply-dependent oxygen uptake and is increased in sepsis
d. Represents the minimal rate of oxygen delivery needed for aerobic metabolism and is increased in sepsis


Question 2#Print Question

Of the following parameters, which is the least influenced by an underdamped or overdamped intra-arterial blood pressure monitoring system?

a. Systolic blood pressure
b. Mean arterial blood pressure
c. Diastolic blood pressure
d. Pulse pressure


Question 3#Print Question

Regarding electrocardiographic (ECG) monitoring in the ICU:

a. A standard 3-lead ECG will detect 95% of ischemia, whereas a 12-lead ECG will detect greater than 98%
b. Lead V4 is the most sensitive for detecting perioperative ischemia
c. A standard 3-lead ECG will detect ischemia at the same rate as a12-lead ECG; however, it is inferior at identifying dysrhythmias
d. Lead V2 is the most sensitive for detecting perioperative ischemia


Question 4#Print Question

Regarding preload, which of the following is true? 

a. It is approximated by the systemic vascular resistance which is calculated by dividing mean arterial pressure (MAP) by cardiac output
b. It is approximated by the right ventricular end-diastolic pressure (EDP) as estimated with pulmonary artery occlusion pressure
c. It is approximated by the right ventricular EDP as estimated with central venous pressure (CVP)
d. It is approximated by the left ventricular EDP as estimated with pulmonary artery occlusion pressure


Question 5#Print Question

All of the following are true EXCEPT:

a. The relationship between EDP and preload is linear
b. EDP is determined by both volume and compliance of the ventricle
c. The relationship between EDP and end-diastolic volume (EDV) can be changed with pharmacologic agents
d. EDP is often used as a surrogate for EDV because it is easier to approximate in the clinical setting




Category: Surgery--->Physiologic Monitoring of the Surgical Patient
Page: 1 of 4