What is the most accurate way to take body temperature?

Mar 28, 2023 Source: Cainiu Health

Dr. Yang Shuwen

Introduction

There is no single most accurate method for measuring body temperature, as temperature can be measured orally, under the armpit, rectally, and at other sites. For oral temperature measurement, the thermometer should first be disinfected, then placed under the tongue with the lips tightly closed. After 5 minutes, remove the thermometer and read the value. The normal oral temperature range is from 36.3℃ to 37.2℃.

There is no single most accurate method for measuring body temperature. Temperature can be measured orally, under the armpit (axillary), rectally, and at other sites. When body temperature readings are within the normal range, special treatment is generally unnecessary. However, if the measured temperature is elevated, measures such as physical cooling or medication may be used to manage it.

1. Oral measurement

To measure temperature orally, first disinfect the thermometer, then place it under the tongue and keep the lips tightly closed. Wait for 5 minutes before removing and reading the thermometer. The normal oral temperature range is 36.3°C to 37.2°C.

2. Axillary (underarm) measurement

Axillary measurement is a commonly used method. Place the tip of the thermometer deep into the armpit and press the upper arm firmly against the body. After 10 minutes, read the value. The normal axillary temperature range is 36°C to 37°C.

3. Rectal measurement

For rectal temperature measurement, position the patient on their side. Apply lubricant to both the anus and the tip of the thermometer. Gently insert the thermometer into the rectum until about half its length is inside. Wait for 5 minutes, then remove and read the value. The normal rectal temperature range is 36.5°C to 37.7°C.

In addition, body temperature can also be measured on the forehead or in the ear canal. Temperature should be measured when the patient is at rest. If the person has just engaged in vigorous physical activity, they should rest for at least 30 minutes before measurement. Before use, shake the thermometer down to below 35°C to ensure an accurate reading.

View All

Will body temperature readings be higher when measured during sweating?

After intense physical exercise, the body secretes adrenaline, which stimulates the sympathetic nervous system and increases metabolic rate. This leads to heightened secretion from the apocrine glands, resulting in substantial sweating. When the external temperature is high, the body absorbs thermal energy, further enhancing metabolic activity and causing increased perspiration. At such times, body temperature also rises relatively, so taking a temperature measurement will yield a higher reading.

View Full Answer

How to Prevent Novel Coronavirus Infection at Home

The novel coronavirus usually refers to the 2019 novel coronavirus, a contagious pathogen. At home, infection can generally be prevented by maintaining environmental and personal hygiene, ensuring adequate nutritional intake, taking body temperature regularly, practicing social distancing, and maintaining a regular daily routine. If symptoms of illness appear, it is recommended to seek timely medical treatment and isolation at a hospital.