General CNA Practice Vital Signs and Measurements 3

Question 1

The systolic blood pressure reading represents:

Accepted Answer

The pressure in arteries when the heart contracts

Answer

The systolic pressure (top number) is the arterial pressure created when the heart contracts and pumps blood.

Question 2

A resident's oxygen saturation (SpO2) reads 89%. The CNA should:

Accepted Answer

Report it to the nurse immediately, as normal is 95–100%

Answer

An SpO2 of 89% is significantly below the normal range of 95–100% and indicates hypoxemia requiring immediate nurse notification.

Question 3

Which factor can cause a falsely low pulse oximetry reading?

Accepted Answer

Cold hands, nail polish, or poor circulation in the finger

Answer

Cold extremities, dark nail polish, and poor peripheral circulation all interfere with the light-based reading of pulse oximetry, causing falsely low results.

Question 4

What is a normal blood glucose range for a non-diabetic person before a meal?

Accepted Answer

70–100 mg/dL

Answer

Normal fasting blood glucose is 70–100 mg/dL; values above 126 mg/dL fasting on repeated tests indicate diabetes.

Question 5

When taking blood pressure in both arms gives different readings, the CNA should:

Accepted Answer

Report both readings to the nurse and use the arm specified in the care plan going forward

Answer

A significant difference between arm readings can indicate vascular problems and should be reported; the care plan designates the correct arm for future measurements.

General Practice Test

General Practice Test

General CNA Practice Vital Signs and Measurements 3