Commonly used is a mercury thermometer. First, let's talk about how to read. Hold the tail of the mercury thermometer with your hands, so that your eyes are on the same level with the thermometer, and then turn the thermometer slowly, and you can read the corresponding temperature value when you see a thick mercury column (red line in the middle) from the front.
When reading, be careful not to touch the mercury end of the thermometer with your hands, which will affect the mercury column and cause inaccurate measurement. Be sure to hold your tail and shake it before each reading to make sure it is not the previous reading.
Operation 2: Usage
Measurement of oral temperature:
(1) Throw the thermometer below 35℃ before use.
(2) Put the thermometer under your tongue (just hold it, don't bite and talk hard).
(3) Measure for at least 3-5 minutes, 7 minutes is the best.
(4) Take out the thermometer, read the temperature data, clean it with toilet paper, and then disinfect it with an alcohol cotton pad (rotate it from the tail end to the mercury end).
Measurement of axillary temperature:
(1) Before use, set the thermometer below 35℃.
(2) Don't take a bath before measurement. Wipe the sweat under your armpit first, and put the mercury end of the thermometer in the middle of your armpit. Be careful not to stick the instrument out. If it is a child, pay attention to hold its arm to prevent it from moving.
(3) Measure for 5- 10 minutes.
(4) Take out the thermometer, and after reading the temperature data, wipe the thermometer with toilet paper.
Measure the anal temperature:
(1) Infants adopt supine leg lifting or prone position, while children and adults adopt lateral position.
(2) Before use, throw the thermometer below 35℃. Lubricate the mercury ball end on the anal surface with lubricant (vaseline or paraffin oil).
(3) Open the anus by hand, rotate the anal table and insert it slowly and gently, and fix it close to the buttocks to prevent it from slipping or inserting too deeply.
(4) Insertion depth: infant1.25 cm; Children 2.5cm；; Adult 3.5 cm
(5) Measure for 2-5 minutes.
(6) Take out the anus watch, read the temperature, clean it with toilet paper, and then disinfect it with alcohol cotton pad (rotate it from the tail end to the mercury end).
Extended data:
The first thermometer was invented by Galileo in16th century. But it was not until 300 years later that a thermometer with convenient use and reliable performance was designed. Mercury is stored in the last mercury ball. When mercury is heated, it will expand and rise along a narrow glass tube.
Therefore, a small change in body temperature will lead to a large increase in mercury in glass tubes. After taking your temperature, you have to shake the thermometer vigorously to make the mercury return to the mercury ball.
Considering the harm of mercury to mercury thermometers, many countries have taken measures to prohibit it. As early as 1992, Sweden has banned the sale of all medical devices containing mercury. Britain, France, Denmark and the Netherlands? It is also forbidden to use and sell. Since 2000, three states and cities such as San Francisco, Boston and Michigan have banned the sale of mercury thermometers.
According to the data of China Medical Device Industry Association, in 2008, the national production of mercury thermometers consumed 109.25 tons of mercury, equivalent to 210.85 billion standard mercury-containing energy-saving lamps. According to statistics, China produces about 65.438+0.2 billion mercury thermometers every year, and more than 654.38+00 tons of mercury is treated as waste due to the breakage of mercury thermometers every year.
References:
Mercury thermometer _ Baidu Encyclopedia