How long should a mercury thermometer be kept under the armpit?
Disease description:
At home, I used a mercury thermometer to take body temperature, but I'm not quite sure about the accurate duration for measuring under the armpit. The instructions provided are inconsistent, so I would like to confirm how long one should measure under the armpit with a mercury thermometer to obtain accurate and reliable readings.
Doctor's answer (1)
Dr. Bai Hongmei
In general, the measurement time for a mercury thermometer under the armpit requires 5-10 minutes.
Measuring body temperature under the armpit requires a certain amount of time for the thermometer to reach thermal equilibrium with the body in order to obtain an accurate reading. Before measurement, ensure the armpit is dry and shake the thermometer down to below 35°C. During measurement, ensure the thermometer is in close contact with the skin, keep the arm naturally hanging down or hold the thermometer firmly in place, and avoid movement to ensure measurement accuracy. Maintain a stable condition throughout the process.
The measurement time for a mercury thermometer under the armpit is generally 5-10 minutes. This time range ensures the thermometer has reached thermal equilibrium with the body temperature, thus providing an accurate temperature reading. After 5-10 minutes, the thermometer can be removed for reading. When reading, position the thermometer at eye level and slowly rotate it to view the position of the mercury column.
It is worth noting that modern electronic thermometers may have a shorter measurement time, usually around 1-2 minutes; refer to the product instructions for exact timing.
