Monitoring body temperature provides insight into a person’s health. An oral thermometer measures the temperature inside the mouth, reflecting internal body conditions. This common and reliable method assesses general well-being and detects deviations from a typical temperature range. Accurate readings depend on the correct application and handling of the thermometer.
Correct Oral Placement
For an accurate oral temperature reading, position the thermometer’s tip within the mouth’s heat pocket. This area is located under the tongue, towards the back, on either side of the frenulum—the small fold of tissue connecting the tongue to the bottom of the mouth. This region is close to the sublingual artery, making it an ideal spot for temperature measurement.
Once the tip is in this sublingual pocket, gently press the tongue down to secure it. Keep the mouth closed around the thermometer to maintain a consistent temperature and prevent external air from influencing the reading. Avoid biting the thermometer and breathe normally through the nose during the measurement. The thermometer should remain in place until it signals completion, usually with a beep or a displayed reading.
Ensuring Accurate Readings
External factors can affect oral temperature accuracy, so consider recent activities before measurement. Consuming hot or cold foods or beverages alters oral cavity temperature. Wait at least 30 minutes after eating or drinking anything for a reliable reading.
Other activities like smoking, chewing gum, or strenuous physical activity also influence oral temperature. Smoking or chewing gum requires waiting 5 to 15 minutes before a reading. Physical exertion temporarily raises body temperature, so wait 30 minutes after exercise for an accurate result. A healthy person’s normal oral temperature ranges between 97.8°F and 99.1°F (36.55°C to 37.27°C).
Before and After Use
Proper preparation and post-use care of an oral thermometer ensure hygiene and functionality. Before each use, ensure the thermometer is clean. Digital thermometers typically turn on with a button and may indicate a low battery.
After use, thoroughly clean the thermometer. Wash the probe with cool, soapy water, avoiding electronic components. Alternatively, wipe the probe and body with a cotton ball or pad soaked in 70% isopropyl alcohol to kill germs. Allow the alcohol to air dry completely before storing.
Store the thermometer in a clean, dry place, away from direct sunlight and extreme temperatures, ideally in its protective case, to maintain accuracy and extend its lifespan.