What is the BEST type of thermometer to use to obtain the temperature?

• A. Oral
• B. Rectal
• C. Axillary
• D. Tympanic

Answer: (D)

Tympanic thermometers measure infrared heat emitted from the tympanic membrane, which is close to the brain’s core temperature and shares blood supply with the hypothalamus. That makes the reading a good quick proxy for core temperature without the invasiveness of a rectal check. It’s fast, comfortable, and practical for both adults and children in a busy clinical setting, so you can get temperature data quickly to guide care.

However, accuracy hinges on proper placement and a clear ear canal. Earwax, ear infections, or incorrect technique can skew results, and this method is less ideal in newborns or anyone with ear pathology. In those cases, alternatives like rectal or oral measurements may be chosen, but for routine, rapid temperature checks, tympanic is typically the best overall option.