When checking a newborn's vital signs, which method of temperature measurement is preferred?

When assessing the preferred method for measuring a newborn's temperature, the axillary method is considered the safest and most commonly used approach. This is because the axillary site provides a quick, non-invasive means of obtaining a temperature. It is an ideal choice for newborns due to their delicate condition and the need to minimize discomfort and potential injury.

Using axillary measurement minimizes the risk associated with other methods such as rectal, which, while accurate, can be uncomfortable and pose a risk of perforation if not performed properly. This risk is particularly concerning in newborns, whose tissue is more fragile. Oral measurement, on the other hand, is not feasible for newborns since they are not capable of holding thermometers in their mouths reliably. Tympanic measurement can be inaccurate in this age group due to the anatomy of the ear and the presence of vernix in neonates.

Thus, when checking a newborn's vital signs, measuring temperature axillary is effective, safe, and suitable for the age group.