UNAR Vital Signs Measurement 2

Question 1

Which thermometer site provides the most accurate core body temperature reading?

Accepted Answer

Rectal

Answer

Rectal temperature is considered the most accurate because it measures internal core body temperature directly.

Question 2

A CNA is measuring a resident's axillary temperature. How long should the thermometer be held in place when using a glass thermometer?

Accepted Answer

5 minutes

Answer

An axillary (underarm) temperature with a glass thermometer requires approximately 5 minutes to get an accurate reading.

Question 3

When taking a rectal temperature, the CNA should insert the lubricated thermometer probe approximately how far into the rectum for an adult?

Accepted Answer

1 inch

Answer

For an adult, the thermometer should be inserted about 1 inch (2.5 cm) into the rectum to obtain an accurate temperature.

Question 4

A tympanic thermometer measures temperature at which location?

Accepted Answer

The eardrum (tympanic membrane)

Answer

A tympanic thermometer measures infrared heat energy from the tympanic membrane (eardrum) to estimate core body temperature.

Question 5

Before taking an oral temperature, the CNA should wait at least how long after the resident has had hot or cold liquids?

Accepted Answer

15 minutes

Answer

The CNA should wait at least 15 minutes after the resident consumes hot or cold liquids before taking an oral temperature to ensure accuracy.

(UNAR) Utah Nursing Assistant Registry Practice Test