Tonometer: what it is, types, how to choose

Tonometer is a device for measuring blood pressure. They are used not only by medical workers. Many different models are produced, suitable for home use for people without medical education. Let's consider the types of tonometers and a few tips for choosing one.

Types of tonometers

Devices for measuring blood pressure are divided into two types:

• Mechanical tonometers are based on listening to tones on the arteries of the arm as air is inflated and deflated from the cuff. They occur when the blood vessels are compressed. This method of measuring blood pressure has high accuracy.
• Electronic tonometers pump air into the cuff automatically and semi-automatically. The device has a built-in compressor. It creates the necessary pressure. In semi-automatic tonometers, the air is pumped by a manual pear, and the device automatically measures pressure readings.

To learn how to use a mechanical tonometer, you need some time. Pressure is measured in a quiet room, so that extraneous noises do not distort the sounds. It is also necessary to properly inflate and deflate the cuff. The main advantage of such a device is a high accuracy of measurement.

Automatic tonometer is easy to use. The device inflates air and records the indicators independently. However, there may be an error in the results. Usually make several measurements and choose an average value. Over time, the accuracy of measurement with an automatic tonometer decreases.

Semi-automatic tonometers are easy to use. They have higher measurement accuracy than automatic models. The error is quite small.

They also produce tonometers that are worn on the wrist. These are automatic models. They are convenient to use on the road, during sports or on walks. However, they can have a significant error, especially when measuring pressure in the elderly.

How to choose a tonometer

Pay attention to such factors:

• An elderly person may find it difficult to use a mechanical tonometer. For him, an automatic device is suitable. It is also convenient for those who find it difficult to determine the tones of vascular compression by ear with a phonendoscope.
• Mechanical tonometers are most often used by medical professionals, since it requires skill.
• Additional features can help to take measurements more accurately. For example, if the tonometer has a motion sensor, it will let you know if the person is too mobile during the measurement. An arrhythmia indicator will indicate heart malfunctions.
• The size of the cuffs differs. They can be universal, standard, small or large. The cuff is chosen according to the size of the hand.
• People who lead an active lifestyle, a compact tonometer on the wrist is suitable. It will help regulate movement during sports or traveling.
• People with poor eyesight will find it convenient to use a tonometer with voice-activated readings.

Choosing a tonometer, it is worth asking about the reputation of the manufacturer, read reviews on the Internet about the brand and specific models. You can also find out whether the tonometer has a certificate of verification.