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Why do you have to shake the clinical thermometer after reading but do not have to shake the laboratory thermometer?
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∙ 15y ago
Wiki User
∙ 12y agoThe thermometer is shaken in order to get the mercury level sufficiently below normal body temperature to ensure an accurate reading.
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Why should a clinical thermometer not be washed in hot water?
The idea is based avoiding use of the thermometer when it is reading "higher" than what it is that is being measured. Let's look at what's happening. If we wash a clinical thermometer in hot water, it will respond to that hot water. That will cause the reading to shoot up well above a hundred degrees. If we then try to use it, it will have to "cool down" under the tongue of the person we're using it on. It is actually being cooled by that person. The thermometer will take a relatively long time to reach the temperature of the individual whose temperature is being measured. And this time will vary, but will be longer than it would be for the thermometer to "come up" to temperature. One of the directions for using these thermometers is to first shake it down until it reads less than 95 degrees or so. If you're starting with a thermometer than has just been washed in hot water, you're not going to be able to shake it down per the directions. You'll have to run it under cool water for a bit to cool it so you can use it.
What is chemical change for baking soda?
If you Shake The Soda Is The Physical change Y You ExploteThe soda Is the Chemical Change..................................... .................... ..................... ......................... .............................. .................................. ...................................... Keep Reading...................... ............................................... ................................................ Well I Think So!
Is fruit shake heterogenous?
yes
What is the solute and solvent in a milk shake?
troll
What happen when you shake a soda can?
You will spill the soda and drop it
What do you do before taking an axillary temperature?
Shake down the thermometer before using, if the reading on the thermometer is 94.0º F or above.
Why does the clinical thermometer have a constriction?
Quote: When the temperature falls, the column of mercury breaks at the constriction and cannot return to the bulb, thus remaining stationary in the tube. After reading the value, the thermometer must be reset by repeatedly swinging it sharply to shake the mercury back through the constriction. Unquote.
Why should a clinical thermometer not be washed in hot water?
The idea is based avoiding use of the thermometer when it is reading "higher" than what it is that is being measured. Let's look at what's happening. If we wash a clinical thermometer in hot water, it will respond to that hot water. That will cause the reading to shoot up well above a hundred degrees. If we then try to use it, it will have to "cool down" under the tongue of the person we're using it on. It is actually being cooled by that person. The thermometer will take a relatively long time to reach the temperature of the individual whose temperature is being measured. And this time will vary, but will be longer than it would be for the thermometer to "come up" to temperature. One of the directions for using these thermometers is to first shake it down until it reads less than 95 degrees or so. If you're starting with a thermometer than has just been washed in hot water, you're not going to be able to shake it down per the directions. You'll have to run it under cool water for a bit to cool it so you can use it.
Why clinical thermometer is jerked before using it again?
If you have an old thermometer that has mercury, then the shaking makes all of the mercury flow to the bottom of the thermometer. Then, you can get a better reading. The current digital ones work differently. Thermometers used for taking people temperatures are a special kind that go up with heat but don't go down with cold. So you have to shake a thermometer before taking your temperature to make the reading go down below your own temperature. Then the thermometer can go up again to read your temperature.
Why is there a need for us to shake the clinical thermometer prior to each use?
If the clinical thermometer is a mercury based thermometer, it needs to be shaken down prior to each use. This is because there is a pinch point between the mercury reservoir bulb and the capillary tube, to ensure that the mercury does not shrink back into the bulb after the temperature has been taken. The mercury has therefore to be shaken back into the bulb before another measurement can be made. One should note that in many countries use of mercury based clinical thermometers is now discouraged (because mercury is toxic) and electronic thermometers are used in stead - these do not need shaking.
How do you use the clinical theamometer?
1.shake the thermometer vigorously so that the murcery goes below the normal mark 2.keep the rhermometer either in the armpit or under the tongue of the person whose temperature is to be taken 3.wait for 2 minutes 4.take out the thermometer and read the mark where the silver mark of mercury ends
What is a test tube used for in a laboratory?
it is used fr a lot of things like to shake things
Difference between clinical thermometer and other thermometer?
You would likely have different ranges and accuracies for different thermometers. I'm using Fahrenheit. Many newer thermometers would be in Celsius, including those used in hospitals/clinics, or in other parts of the world outside of the USA. A clinical thermometer might read from about 80°F to 110°F, and would be accurate to 1/10 or 2/10 degrees. They can be digital, mercury, or even plastic disposable. They normally have a method to lock in the maximum temperature (like the old ones that you had to shake down). Modern clinical thermometers will either have a disposable plastic cover for the non-disposable variety, or will be 100% disposable. Ocular ear thermometers are a new type of infra-red thermometers. A household thermometer might read from -20°F to 120°F, and might only be accurate to 1 or 2 degrees. If the thermometer is a glass thermometer, the scale is never written on the actual thermometer. A scientific thermometer might have a range up to the boiling point of water... is often in Celsius (-10°C to 110°C), and accurate to a degree Celsius (2 degrees Fahrenheit) or so. A cooking thermometer might have a range of 100°F to 500°F. There may be some glass (or disposable) cooking thermometers, but many are also metal for durability.
How do you take temperature with a clinical thermometer?
Step 1: Clean your glass thermometer with isopropyl alcohol before using it, then dip the tip into some cool water, or wipe with a tissue, to remove the taste of the alcohol. Step 2: Shake down your glass thermometer until the mercury line is below 96.6 degrees F. Step 3: Slide the tip of the thermometer under one side of the tongue, well into the back of the mouth. Step 4: Close your mouth around the thermometer using your lips - don't clench the glass thermometer with your teeth. Breathe through your nose, with your mouth closed. Step 5: Leave the thermometer under your tongue for 3 full minutes. Step 6: Remove the thermometer and hold it under a bright light, so you can see how high the mercury has risen. An arrow will point to the normal temperature, which is 98.6 degrees F.
Your oral thermometer is stuck on 107 degrees?
If the mercury won't shake back down, you ought to buy a new one.
How do you take an 11 year-old's temperature rectally?
When taking a child's temperature rectally, it mostly done with infants or children who cannot sit still long enough with a glass thermometer in their mouth. Taking a rectal temperature on a child older than 2 or 3 years of age is mostly considered inappropriate. Advances in temperature monitoring have made glass thermometers in general, and rectal thermometers specifically, obsolete. Most electronic thermometers, which read the surface temperature of the ear drum or the skin of the forehead, can provide an accurate reading of the internal temperature of the body, without subjecting a child to the dangers of having a fragile glass thermometer filled with mercury (which is highly toxic), inserted into their rectum. If the rectal thermometer is the only means you have to take a child's temperature, use the following guidelines: 1. Have the child lie prone on a bed. 2. Take the rectal thermometer from its protective case, and inspect it closely for any chips, cracks or breakage. If your thermometer displays any imperfection at all, discard and do not use. (Some states have strict guidelines on the disposal of mercury containing thermometers, so be sure to check with your local pharmacy on how to properly dispose of thermometers.) 3. Holding the thermometer firmly at the top (not the mercury bulb end), briskly shake down the mercury so it reads a low temperature. 4. Lubricate the first 1.5 inches of the bulb end of the thermometer with petrolatum or a water soluble lubricant. 5. Using the thumb and forefinger of the opposite hand, part the child's buttocks and gently insert the bulb end of the thermometer into the anus, to a depth of no more than 1 inch. Instruct the child to be quiet, hold still as you wait the three minutes to take a reading. DO NOT EVER let go of the thermometer! 6. After three minutes, gently remove the thermometer slowly, and raise it to the level of your eyes to take the reading. Do not shake the thermometer until you have read it. 7. Give the child a tissue or piece of toilet paper to clean up any residual lubricant from the anus. 8. Wipe the thermometer with tissue, and then wash in lukewarm water with soap and rinse well before storing it back into it's protective case.
Is it normal for the temperature to go up on a thermometer when it has come out of a ice-water bath for 1 minute?
Assuming that the surroundings are above the freezing point of water - yes - it is normal for the temperature on the thermometer to go up. It may still remain elevated even if plunged back into the ice bath since the thermometer has mass and can absorb some energy while out of the bath. There is also the phenomena that in some thermometers even when the temperature drops, the thermometer fluid sometimes remains elevated unless you "shake down" the thermometer.
