Q: Which equation is used to estimate mean arterial pressure ($$MAP$$)?

$$MAP = SBP + (2 \times DBP)/3$$

Question 1

Which of the following best describes the concept of perfusion in the human body?

Accepted Answer

The delivery and passage of blood through a capillary bed in a tissue or organ, providing oxygen and nutrients and removing wastes.

Question 2

A patient presents with cool, clammy skin, weak peripheral pulses, and altered mental status. Which condition is most likely indicated by these findings?

Accepted Answer

Inadequate perfusion (shock)

Question 3

Which formula correctly calculates cardiac output ($$CO$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 4

A nurse is assessing a patient for adequate perfusion. Which of the following findings would NOT be considered an indicator of adequate perfusion?

Accepted Answer

Jugular vein distension (JVD)

Question 5

Which equation is used to estimate mean arterial pressure ($$MAP$$)?

Accepted Answer

$$MAP = SBP + (2 	imes DBP)/3$$

Question 6

A patient’s blood pressure is measured at 140/90 mmHg. According to the 2017 guidelines, how would this be classified?

Accepted Answer

Stage 2 Hypertension

Question 7

Which of the following factors has the greatest immediate effect on vascular resistance ($$R) $$according to the formula $$R = \frac{8Ln}{3.14r^4$}$$?

Accepted Answer

Radius of the blood vessel

Question 8

A 10% decrease in the radius of a blood vessel will result in approximately what percentage decrease in blood flow?

Accepted Answer

50%

Question 9

Which medication is classified as a beta-blocker and primarily decreases cardiac output ($$CO$$)?

Accepted Answer

Metoprolol

Question 10

A patient with chronic hypertension is prescribed an ACE inhibitor. What is the primary mechanism by which this medication lowers blood pressure?

Accepted Answer

Promotes vasodilation and decreases resistance ($$R)$$

Question 11

Which of the following is a modifiable risk factor for poor perfusion?

Accepted Answer

Smoking

Question 12

A nurse is teaching a patient about lifestyle modifications to promote healthy perfusion. Which recommendation is most appropriate?

Accepted Answer

Begin a daily regimen of physical activity

Question 13

Which of the following is a direct method for measuring blood pressure?

Accepted Answer

Catheterization of the brachial, radial, or femoral artery

Question 14

A patient is experiencing orthostatic hypotension. Which of the following is the most likely cause?

Accepted Answer

Peripheral vasodilation

Question 15

Which of the following is NOT a common error that can lead to inaccurate blood pressure measurement?

Accepted Answer

Using a properly sized cuff

Question 16

Which physiological response is activated during shock to help restore perfusion?

Accepted Answer

Activation of the sympathetic division of the autonomic nervous system

Question 17

An older adult presents with agitation and frequent falls. Which underlying issue should the nurse consider first?

Accepted Answer

Early signs of cardiovascular disease affecting perfusion

Question 18

Which of the following is the correct formula for vascular resistance ($$R$$)?

Accepted Answer

$$R = \frac{8Ln}{3.14r^4$}$$

Question 19

A patient with decreased cardiac contractility is most likely to experience which of the following?

Accepted Answer

Reduced flow of blood from the heart and increased ventricular pressures

Question 20

Which assessment finding is most indicative of poor perfusion in the lower extremities?

Accepted Answer

Cool, pale skin with diminished pulses

Perfusion: Physiology, Assessment, and Clinical Considerations

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