How to use clinical thermometer
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Reading a Mercury Glass Thermometer properly is essential, both at home and hospital. Accurate checking of body temperature is vital for determining course of treatment or medication. One should read mercury thermometer immediately after taking the temperature. The temperature should be read to the closest line.
- In a Fahrenheit thermometer:
* Long lines indicate 1 degree.
* Short lines indicate 0.2 degree.
- While in a Celsius thermometer:
* Long lines indicate 1 degree or 0.5 degree.
* Short lines indicate 0.1 degree.
Most of the mercury thermometer, though, have dual scales.
One should be careful while reading temperatures between 100 degrees and 101 degrees, because many people mistakenly record or report the tenth of a degree as a whole degree. For example, 100.2 degrees is between 100 and 101 while 102 degrees is between 102 and 103. Avoid mistakes as it could result in inappropriate therapy. - Read Mercury Thermometer at Eye level
- Long lines on Fahrenheit scale indicate 1 degree
- Short lines on Fahrenheit scale indicate 0.2 degree
- Read Celsius scale to nearest 0.1 degree
- Read temperature to nearest lines
- After taking the temperature, hold the thermometer up to a light where you can see the mercury line and the numbers
- Rotate the thermometer until you can clearly see the number and the lines between the numbers, much like on a ruler
- The point where the mercury ends is what the temperature is
How to Check a Temperature Under the Tongue (Orally)?
Shake down the mercury in a glass thermometer before placing it under the tongue. Do this by holding the thermometer firmly and flicking the wrist until the mercury reads at or below the lowest number. Ensure thermometer is away from people and objects before shaking. Now, place the bulb end of the thermometer under the tongue and ask the person to close his mouth and breathe through his nose. The thermometer must stay under the tongue for at least a minute to 2 minutes.
When an Oral Temperature should not be taken?
Avoid measuring body temperature under the tongue if the person is:
- Infant or child (under the age of 6)
- injured or bleeding orally/has pain and/or sores in the mouth
- unable to close the lips or had surgery in the mouth recently
- experiencing chills or rigors or if her teeth are chattering
- having difficulty in breathing or receiving oxygen via a mask
- using a nasogastric tube for feedings
- unable to take commands, confused, combative, or uncooperative
- unconscious or not responsive or on seizure precautions
To use a clinical thermometer follow the steps given below :
Determine the value of one small division on the thermometer scale.
For this, count the number of small divisions between two bigger marks i.e, a difference of 1°C .
Then
= 0.2°C. (assuming there are 5 small divisions)
Thiswe can measure temperature up to 0.2°C with certainty.