No you dont add or subtract anything.
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No, ear thermometers do not require adding degrees. Simply insert the thermometer gently into the ear canal and follow the manufacturer's instructions for accurate readings.
The tympanic thermometer is inserted into the ear canal to measure body temperature. It is a quick and non-invasive method of taking a temperature reading.
Oral method: placing a thermometer under the tongue. Axillary method: placing a thermometer in the armpit. Tympanic method: using an ear thermometer to measure temperature in the ear canal. Rectal method: inserting a thermometer into the rectum for a core body temperature reading.
An inaccurate tympanic temperature reading can be caused by an improper placement of the thermometer in the ear canal, earwax buildup, an ear infection, cold temperatures affecting the ear canal, or not allowing enough time for the thermometer to equilibrate to the ear temperature.
The units on a thermometer are known as degrees. Common units for temperature measurement include degrees Celsius (°C) and degrees Fahrenheit (°F).
Degrees Celsius.