How To Use a Digital Thermometer — A Guide

Quick, efficient and easy to use, digital thermometers are an increasingly popular choice for both domestic and professional users. There are three main types of digital thermometers: ear (tympanic) thermometer, digital ‘stick’ thermometers and infrared thermometer. Each type of thermometer provides fast, accurate readings, giving health professionals invaluable diagnostic information.

In order to ensure that readings taken from a digital thermometer are as accurate and as useful as possible, the device needs to be used and read correctly. To help you precisely assess yourself, your child, or your patient, we’re looking at how to take a temperature with a digital thermometer.

How To Use a Digital Thermometer?

In most cases, doctors, nurses and other medical professionals will be shown how to take a temperature with a digital thermometer as part of their workplace training. However, it’s always a good idea to refresh your knowledge on the subject on a regular basis, especially as products, guidelines and standard practices change over time. 

Before using a digital thermometer, it's essential to identify the thermometer's intended use, as they're designed for specific measurement sites: ear (tympanic), oral (under the tongue), rectal, or axillary (under the arm). Some models, particularly tympanic thermometers, offer the versatility of infrared forehead readings, expanding their utility.

Using a digital thermometer accurately is a blend of technique, knowledge, and experience. We advise that you always ensure the thermometer is clean and correctly set up before use. Also, patience is key, wait for the thermometer to signal that it has finished reading. This patience ensures accuracy, which is essential for making informed health decisions. 

How To Use a Digital Ear Thermometer?

Instructions on how to use a digital ear thermometer should come with your device. These instructions will give you a precise idea of exactly how your thermometer works and how to get the best results.

In general, your reading will be most accurate if the thermometer is placed in the correct position. Most digital ear thermometers require you to pull the ear gently back and out so that the probe can fit snugly into the ear canal. Once the thermometer is in position, wait until the device beeps. This will tell you that the reading has been taken successfully. In some cases, you may need to press a button to trigger the device.

The thermometer should only take a few seconds to take the reading. It’s important that the patient remains still until the reading is complete. For accurate and reliable measurements, consider using the Welch Allyn Pro 6000.

Once the patient’s temperature has been taken, the results will be displayed on the small digital screen on the side of the thermometer. In most cases, you’ll be able to choose whether to see results displayed in degrees Celsius or Fahrenheit. Some thermometers also give you the option to save readings for future comparison.

If there’s any uncertainty about a reading, taking it again after a short interval can help ensure accuracy. However, be mindful that factors like earwax buildup, ear infections, or the shape of the ear canal can affect readings. In such cases, alternative types of thermometers might be more suitable. 

Your digital ear thermometer should be cleaned and sterilized after each use to avoid infection.

How Do You Use a Digital Infrared Thermometer on the Forehead?

Non-contact forehead thermometers like Omron MC720 are a good option for people who need fast, hygienic temperature readings. As they don’t touch the skin of the patient, they can be used on multiple people without the need for sterilization.

When using a digital forehead thermometer, it’s always best to read the manufacturer’s guidelines before you begin. This will help to ensure your readings are as accurate as possible.

When taking a reading, ensure the patient's forehead is around 2-3 cm from the thermometer, clear of hair, sweat, or cosmetics, as these can affect accuracy. Position the thermometer parallel to the forehead for a direct, unobstructed path to the skin. Press the main button to initiate the reading, and remember to keep the thermometer steady at the recommended distance until it signals the completion of the measurement, usually with a beep. It’s also advisable to take multiple readings and use the average to ensure accuracy, especially if the readings seem inconsistent.

How To Use a Digital ‘Stick’ Thermometer in the Mouth?

As an expert in the field, we'd like to emphasize the importance of proper preparation and usage when employing a digital mouth thermometer. Before any measurement, it's crucial to clean and sterilize the thermometer. This step ensures accuracy in readings and prevents cross-contamination, especially important in a clinical or multi-user environment. For accurate and reliable temperature measurements, consider the Welcare Digital Thermometers.

When you’re ready, place the thermometer under the patient’s tongue, towards the back of their mouth. This area, known as the sublingual pocket, is ideal for temperature measurement due to its rich blood supply, providing a more accurate reflection of the body's core temperature.

Ask the patient to close their lips around the thermometer. You’ll then need to wait until the device beeps or flashes to show the reading is complete before removing it. Some devices require you to trigger the reading manually using a large button on the front of the thermometer.

How To Read a Digital ‘Stick’ Thermometer Under the Arm?

When taking a temperature under arm with a digital thermometer, you’ll need to place the device directly against the skin and hold the arm gently against it. If you’re not sure how long to leave the digital thermometer under arm, simply wait until the device beeps or flashes to indicate the reading is complete, or check the manufacturer’s instructions.

Clean the thermometer with disinfectant before storing it away. Keep in mind that underarm temperatures can be slightly lower than oral temperatures. If the reading is unusually high or if you have any concerns, it's best to consult with a healthcare provider.

How To Take Children Temperature with Digital Thermometer?

If you’re taking the temperature of a young baby, you’ll need to use an under arm digital thermometer or a forehead thermometer, as a suitable suggestion you could use Infant Tympanic Thermometer.

If you’re unsure where to take the temperature with a digital thermometer, opt for an under arm reading as the baby is less likely to move and cause an inaccurate result.

Older children can have their temperature taken with ear, mouth, armpit or forehead devices.

Whichever method you choose, make sure the child stays as still as possible for the duration of the reading. If they move, you may need to take multiple readings in order to get an accurate result. 

Can You Use a Digital Thermometer for Basal Temp

The basal temperature is an indicator of when a woman is ovulating. A lot of women track this temperature throughout their menstrual cycle in order to improve their chances of conceiving. We recommend basal body temperature to be measured immediately upon waking, before any physical activity is undertaken, to ensure accuracy and It's crucial to take the temperature at the same time every morning.

Digital thermometers can be used to check a woman’s basal temperature. However, it’s often better to invest in a specialist basal body thermometer as these are more sensitive than standard digital thermometers and so are more likely to produce an accurate result. Basal thermometers often also come with a choice of programmes and memory options to make it easy to monitor your temperature during ovulation.

Learn more about digital thermometers, and the high quality products we offer, by exploring our range or getting in touch with a member of our team today.

 

Author: Steven John Cumper, B.App.SC. (Osteo.), M.Ost., is a businessman with a strong foundation in biomedical science and osteopathic medicine, who founded and led Medshop to international success, culminating in its acquisition by the Bunzl Group in September 2021, where he continues to serve as Managing Director (Medshop Group).