Which method of measuring body temperature is considered most accurate?

• A. Oral
• B. Rectal
• C. Aural
• D. Skin

Answer: (B)

The rectal method of measuring body temperature is considered the most accurate due to its ability to provide a measurement that reflects the body's core temperature. This method is less affected by external factors such as the ambient temperature and has a lower risk of being influenced by recent food or drink consumption, which can affect oral readings. Rectal temperatures are commonly used in clinical settings, particularly for infants and in situations where high accuracy is critical. The rectal thermometer is inserted into the rectum and can give a reliable indication of internal body temperature, making it a preferred choice for assessing fever and other medical concerns.

In contrast, oral temperatures may vary due to factors such as recent consumption of hot or cold substances, while aural (ear) measurements can be influenced by earwax or improper placement of the thermometer. Skin temperature readings, whether taken with infrared thermometers or other methods, tend to reflect surface temperatures and may not provide an accurate assessment of core body temperature, especially in fluctuating environment conditions. Thus, the accuracy and reliability of rectal temperature measurements stand out in clinical practice.