Plethysmographs For Sale

Plethysmographs — diagnosis of internal organs and systems

Plethysmography is an assessment of blood filling of an organ or part of the body by recording changes in volume. The technique is used to study vascular tone and its regulation. A plethysmograph device is used to conduct diagnostics. The principle of its operation is based on the direct recording of volume, blood filling dynamics, changes in the electrical properties of tissues, light permeability. Thanks to the study, specialists assess the condition of blood vessels and can identify even the slightest violations, make an accurate diagnosis, and prescribe the correct treatment.

Features of plethysmography

Plethysmograph provides continuous graphic registration, reflecting data on the organs, body parts under study. Plethysmography is used to study:

• functional state of the cardiovascular system;

• distribution of blood in the body;

• changes in physical and mental activity, fatigue, emotions;

• reactions under the influence of heat, cold, irritants, various substances.

In medical institutions, the technique is used to assess the tone and elasticity of blood vessels, pulse amount of blood, the state of the central nervous system, for the study of cortico-visceral relations.

Types of plethysmographs

Plethysmography helps to obtain data on several parameters at once. During the procedure, the heart rate, shock volume of blood, peripheral vascular tone are taken into account. The study involves the use of a complex of equipment, where each device performs its function:

1. Mechanical plethysmograph — registers the volume of tissues.

2. Reoplethysmograph or electroplethysmograph — records changes in electrical properties.

3. Photoplethysmograph — analyzes the ability of tissues to transmit light.

High-quality medical plethysmograph allows you to timely identify deviations in the processes of blood flow.

Plethysmography of the lungs

Plethysmograph is widely used to diagnose alveolar pressure, obstruction and patency of the airways. During the study, the doctor evaluates the total capacity as well as the residual lung volume.

The patient is in a special hermetically sealed chamber, breathing through a mouthpiece. Alveolar pressure at the end of exhalation and inhalation is equal to the pressure in the cabin. With the help of a plug, the mouthpiece is closed off — the medical worker asks to inhale and exhale. Based on the data obtained, changes are determined and readings are calculated.

Plethysmograph contributes to the diagnosis of obstruction, setting its type: emphysematous, intrathoracic, extrathoracic. The technique allows you to analyze the functional capacity of the lungs in critically ill patients.

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