Maintaining a healthy core temperature is essential for ensuring the proper functioning of the body’s systems. Any fluctuations can cause discomfort, illness or even lead to serious health problems. Therefore, it is essential to have an accurate measurement of the body’s core temperature. But, which is the best way to measure core temperature?
There are different methods for measuring the body’s temperature, including oral, rectal, tympanic, and axillary methods. Each has advantages and disadvantages, and the accuracy of the measurement varies depending on the method. Let’s take a closer look at each method.
Oral Temperature:
Oral temperature measurement is probably one of the most well-known methods. It involves placing a thermometer in the mouth under the tongue and waiting for a few minutes for the reading to be stable. It is non-invasive and can be performed at home.
However, it is essential to wait at least ten minutes after eating, drinking, or smoking to ensure an accurate measurement. Additionally, oral temperature measurement is not suitable for patients who are unable to close their mouth or who have had oral surgery.
Rectal Temperature:
Rectal temperature measurement is considered to be the most accurate method of measuring core temperature, especially in critically ill patients. It involves inserting a thermometer into the rectum, and readings can be obtained within a minute.
While it might be more invasive than oral measurements, rectal measurements are preferred in seriously ill patients because they offer accurate temperature readings. Unfortunately, this procedure often causes discomfort and can be time-consuming, making it unsuitable for some patients.
Tympanic Temperature:
Tympanic temperature measurement involves placing a thermometer into the ear canal, and a reading is taken within seconds. It is a non-invasive method and can be performed at home. However, the accuracy of the measurement is dependent on the thermometer being correctly positioned in the ear canal, which can be challenging, particularly in children.
Additionally, tympanic measurements may not be entirely accurate in patients with an ear infection or earwax buildup. Despite these drawbacks, tympanic measurements are still used regularly.
Axillary Temperature:
Axillary temperature measurement involves placing a thermometer under the armpit, in the ‘lateral recumbent’ position, and waiting for reading to be stable. It is non-invasive and can be performed at home.
This process is also suitable for infants and young children. However, because it measures the surface temperature instead of core temperature, it is considered to be the least accurate method and can generally not be relied upon.
In Conclusion
For the above reasons, rectal temperature measurement should be considered the best method to measure core temperature. It is the most accurate method, particularly in critically ill patients, and offers the quickest and most reliable measurement.
While rectal measurements may be more invasive than oral measurements, particularly in infants and young children, the results obtained from rectal measurements are unmatched in terms of their accuracy. As a precaution, regardless of the method, it is always important to remember to disinfect and sterilize the thermometer correctly after use.
In summary, measuring core temperature is essential for identifying and monitoring illness, maintaining overall health, and reducing the risk of health complications. Each method has its advantages and disadvantages, but rectal temperature measurement remains the most accurate and reliable method. We recommend everyone procures a reliable rectal thermometer to ensure they are measuring core temperature accurately, particularly during the COVID-19 pandemic where monitoring core temperature is crucial in preventing the spread of the virus.