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 pressure in arteries when the heart is at rest between beats

Answer

The average blood pressure over 24 hours

Answer

The pressure in veins

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

Document it and check again in an hour

Answer

Consider it normal for elderly residents

Answer

Increase the resident's activity level

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

A warm, well-perfused fingertip

Answer

Normal lighting in the room

Answer

The resident being relaxed

Question 4

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

Accepted Answer

70–100 mg/dL

Answer

200–250 mg/dL

Answer

130–160 mg/dL

Answer

Below 50 mg/dL

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

Use the average of the two readings

Answer

Ignore the difference

Answer

Always use the left arm regardless

Question 6

The correct number of fingers to use when counting a radial pulse is:

Accepted Answer

Two or three fingers (index and middle, never the thumb)

Answer

One finger (the index finger)

Answer

The palm of the hand

Answer

The thumb only