How long should a rectal temperature reading be taken for accuracy?

For accurate measurement of a rectal temperature, it is important to allow the thermometer to register the reading for a sufficient amount of time to ensure that the measurement reflects the body's core temperature accurately. A four-minute duration is recommended for rectal temperature readings because it provides enough time for the device to stabilize and give a reliable result.

This duration is particularly crucial since rectal temperatures are often higher than oral temperatures, and a shorter time may not capture the true temperature. The recommendation of four minutes balances the need for accuracy with practicality, making it the standard practice in medical settings. Measurements taken for shorter periods might not provide an accurate representation of the core temperature, which could lead to misinterpretations and potentially impact patient care.