Plethysmography

Plethysmography is a medical diagnostic technique that is used to study changes in blood volume in different parts of the body. This method is based on measuring changes in tissue volume in response to changes in pressure in blood vessels.

Plethysmography can be performed both on individual parts of the body and on the whole organism. For example, lung plethysmography measures the volume of air in the lungs as pressure changes in the chest. Cardiac plethysmography measures the volume of blood in the heart as pressure changes in the arteries.

To carry out plethysmography, special devices are used - plethysmographs. They make it possible to measure changes in tissue volume in real time. The results of plethysmography can be used to diagnose various diseases, such as cardiovascular diseases, lung diseases and others.

One of the main advantages of plethysmography is its non-invasiveness. This method does not require surgery or insertion of any instruments into the body. In addition, plethysmography can be performed in an outpatient setting, making it accessible to a wide range of patients.

Thus, plethysmography is an important medical diagnostic method that allows one to study changes in blood volume in various tissues and organs. It can be used to diagnose many diseases and can be performed on an outpatient basis without surgery.

**Plethysgraphy** is a method for determining the volume of blood that flows in small-diameter vessels over a certain period of time. It is used to diagnose various diseases and evaluate the effectiveness of treatment for arterial hypertension.

The main stages of plethysgraphy include:

+ Place a pressure sensor and thermometer on the finger or wrist and connect them to the computer + Place the heart rate sensor on the heart rate monitor + Adjust the patient's position to improve blood flow to the finger or wrist + Record measurement results in graph form

Plethysgraphy results may indicate various changes in the cardiovascular system, such as increased or decreased systolic pressure, decreased elasticity of the vessel wall, and changes in heart rate.

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