8.2 Temperature Measurement (INACE Skill)

Temperature as a Tested INACE Skill

Measuring and recording temperature is part of the mandated INACE performance skill that also covers pulse and respiration (TPR). Body temperature reflects the balance between heat the body produces and heat it loses. An abnormal temperature is one of the earliest signs of infection, and in older adults even a small rise can signal serious illness because their baseline is often lower.

Most facilities use an electronic digital thermometer with a single-use disposable probe cover. Color-coded probes are common: blue for oral/axillary, red for rectal. Never use the same probe for oral and rectal sites.

Temperature Sites and Their Normal Ranges

The single most-tested fact here is that each site reads differently. Rectal and tympanic run about 1°F higher than oral; axillary runs about 1°F lower.

Key Temperature Terms

Oral Temperature Procedure (Step by Step)

Follow these steps in order on the skills test. Skipping hand hygiene or failing to use a probe cover is an automatic critical error.

1. Wash your hands and identify the resident (check the ID band/name).
2. Explain what you are going to do and provide privacy.
3. Confirm the resident has not eaten, drunk, or smoked in the last 15 minutes — hot or cold intake warms or cools the mouth and falsifies the reading.
4. Apply a clean disposable probe cover without touching the tip.
5. Place the probe under the tongue in the sublingual pocket — toward the back, off to one side, not directly center-front.
6. Have the resident close the lips (not teeth) gently around the probe.
7. Wait for the beep — usually 10-60 seconds on a digital unit.
8. Read and remember the number, then eject the probe cover into the trash without touching it.
9. Record immediately the temperature, time, and method ("oral").
10. Report any reading above 101°F or below 96°F to the nurse.

Worked Example

A resident's oral reading is 101.4°F. Because this is above the 101°F reportable threshold, you do not wait or retake in 30 minutes — you record it and notify the nurse right away, then document the time and that you reported it. A new fever may be the first sign of a urinary tract infection or pneumonia.

When NOT to Take an Oral Temperature

Use an axillary, tympanic, or temporal method (as the nurse directs) instead of oral if the resident:

• Has eaten, drunk, or smoked within the last 15 minutes
• Is unconscious or has altered consciousness
• Is confused or combative (risk of biting the probe)
• Has had oral surgery or a mouth injury
• Is breathing through the mouth (cools the probe → false low)
• Is receiving oxygen by mask or has a nasogastric tube in place
• Is a young child (under about 6 years old)

Common Traps

• Trap: Reading the wrong site's range as abnormal. A tympanic 100.2°F is normal for that site even though it would be slightly high orally.
• Trap: Placing the probe in the front-center of the mouth instead of the sublingual pocket — gives a low reading.
• Trap: Touching the probe tip with bare fingers, contaminating it.
• Trap: Converting units carelessly — remember 98.6°F = 37.0°C as your anchor point.

How the Body Controls Temperature

Understanding why temperature changes helps you decide what to report. The brain's hypothalamus acts as a thermostat. When a resident is fighting infection, it raises the set point, the body shivers to make heat, and the resident may feel chills even with a high temperature. As the fever breaks, the resident sweats (diaphoresis) to lose heat. A CNA who notices shivering, flushed skin, or sudden sweating should take a temperature and report a fever early — these outward signs often appear before the number is checked.

Caring for a Resident With a Fever

While the nurse manages medications, the CNA provides comfort measures within scope: offer extra fluids if allowed, keep the resident lightly covered (do not pile on heavy blankets), provide dry linens after sweating, and recheck the temperature as directed. Report a fever that keeps rising, a temperature above 101°F, or a low reading below 96°F, which can signal hypothermia in a frail older adult, especially after cold exposure or in a chilly room. Both extremes are reportable, not just high readings — a common point new aides forget on the written test.