When taking a rectal temperature in an infant, how far should the thermometer be inserted?

When taking a rectal temperature in an infant, it is recommended to insert the thermometer about ½ inch into the rectum. This depth is considered safe and sufficient to obtain an accurate measurement without causing injury to the infant.

Inserting the thermometer too deeply may lead to discomfort or potential injury, as the rectum is a sensitive area, especially in infants. On the other hand, failing to insert it adequately may result in an inaccurate reading. Therefore, ½ inch is the recommended standard for measuring an infant's rectal temperature. It strikes the balance needed for both safety and accuracy in temperature readings for young patients.