What is the minimum time required for an accurate axillary temperature reading?

An accurate axillary temperature reading typically requires a minimum time of about ten minutes. This duration allows the thermometer to stabilize and provide a reading that reflects the body's true core temperature, as the axillary area is less reliable than other sites such as the oral or rectal regions. The axilla is a cooler environment, and the temperature measurement can be influenced by external factors, such as ambient temperature, sweating, and subcutaneous tissue thickness. Allowing the thermometer to rest for a sufficient amount of time ensures that it properly equilibrates with the body's temperature.

The other time durations suggested are either too short or not the standard practice for axillary measurements. For example, five and six minutes may not allow for enough stabilization, while fifteen minutes exceeds the commonly accepted guidelines, making ten minutes the most practical choice for obtaining an accurate axillary temperature.