Recently, with the change of seasons, there has been a flu outbreak, leading to a rapid increase in the demand for thermometers. Let's popularize some knowledge about how to choose a thermometer, how to measure body temperature correctly, and what precautions to take while measuring body temperature.

What are the types of thermometers?

As we all know, choosing a thermometer can sometimes be confusing, as we are unsure which type is better or provides more accurate measurements. Currently, there are several types of thermometers available on the market: glass thermometers, electronic thermometers, and infrared thermometers (such as temporal artery or ear thermometers). Each type of thermometer has its advantages and disadvantages, and their usage varies depending on the specific situation.

Glass mercury thermometers have the following advantages: accurate measurements, affordability, compact size, easy operation, easy cleaning, and disinfection. However, they have the disadvantage of being made of glass, which makes them prone to breakage. When broken, the mercury inside can be released, posing a risk of environmental pollution and being harmful to both health and the environment.

Electronic thermometers can be considered as the electronic version of traditional mercury thermometers. They are convenient, widely used, and generally accurate, making them suitable for home use.

Advantages: Firstly, electronic thermometers are safer because most of them are made of durable engineering plastics that are resistant to breakage. Even if they are accidentally dropped, there is no risk of glass cuts or mercury poisoning. Secondly, the LCD screen on the body of electronic thermometers makes it easier to read the temperature readings. Some thermometers also have memory or timing functions.

Disadvantages: The stability of measurements with electronic thermometers is slightly lower compared to glass thermometers, requiring frequent calibration. The accuracy of the readings can be affected by factors such as the condition of electronic components and battery power, making them less accurate than glass thermometers.

Infrared thermometers are mainly used for large-scale temperature screening in places such as train stations, airports, hospitals, and workplaces.

Advantages: Infrared thermometers provide quick readings without the need for direct contact with the human body, which helps to prevent the spread of infections.

Disadvantages: The results of infrared thermometers can be easily influenced by external factors such as outdoor temperature, lighting conditions, and radiation. Therefore, they may not be as accurate and may require multiple measurements for verification. Additionally, they tend to be more expensive, with prices generally exceeding one hundred units of currency.

The commonly used sites for temperature measurement include:

1. Armpit (Axillary): The normal body temperature in the armpit ranges from 36.0 to 37.4°C.

2. Mouth (Oral): The normal body temperature in the mouth ranges from 36.0 to 37.0°C.

3.Rectum (Rectal): The normal body temperature in the rectum ranges from 36.5 to 37.7°C.

4.Behind the Ear (Tympanic): The normal body temperature behind the ear, in the ear canal, on the forehead (temporal artery temperature), or on the forearm is below 37.5°C.

For individuals diagnosed with or suspected of having COVID-19, fever is a common symptom. However, it's important to note that different body sites have different temperature standards. If the measured temperature exceeds the normal range for the specific site, it is considered a fever.

To accurately measure your body temperature, it is important to take certain precautions and avoid factors that can influence your temperature readings. Here are some guidelines to follow:

1.Rest before measuring: Rest for at least 30 minutes before taking your temperature. Avoid engaging in activities that can cause an increase in body temperature, such as playing sports, intense physical exercise, or climbing stairs.

2.Avoid consuming food or beverages: Refrain from eating, drinking extremely hot or cold liquids, or consuming anything that may affect your body temperature prior to measurement.

3.Avoid external temperature influences: Avoid taking a temperature measurement immediately after bathing, using cold or hot compresses, or engaging in therapies that may alter your body temperature.

3. Ensure a stable environment: Choose a location with a stable temperature and minimal exposure to drafts. This will help ensure more accurate temperature measurements.

1.When using different types of thermometers to measure body temperature, there are certain precautions to take and measures to prevent cross-infection. Here are some important considerations:

2.Mercury Thermometer: If using a mercury thermometer, it should be disinfected with alcohol and dried before measuring. Pay attention to the scale and ensure that it is below 35 degrees Celsius before shaking to avoid damaging the mercury column.

3.Axillary or Forehead Thermometer: If measuring temperature in the armpit or on the forehead, ensure that the area is dry before measurement to prevent inaccurate readings due to sweat.

4.Read the instructions: It is important to read and follow the instructions provided with your specific thermometer. Different thermometers have varying measurement standards, measurement sites, and measurement times. Follow the guidelines in the instructions to ensure accurate and reliable results.

Prevent cross-infection: After each use, clean the thermometer with alcohol or disinfectant to prevent cross-infection. It is important to avoid sharing thermometers between individuals to minimize the risk of spreading infections.

By following these precautions and practicing proper hygiene, you can obtain accurate temperature measurements while minimizing the risk of cross-infection.