Physics underpinning Impedance Plethysmography

Thread starter Sarahf
Start date Nov 10, 2010
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Impedance Physics

In summary, Impedance Plethysmography (IPG) is a non-invasive medical technique that measures changes in blood flow by using electrical impedance. It works by emitting a small electrical current through the tissues and calculating the change in impedance caused by the presence of blood. IPG is based on bioimpedance principles and is commonly used in clinical settings and research. However, it has limitations such as being affected by factors like body position and tissue composition, and not being suitable for individuals with pacemakers or other implanted electronic devices. It also cannot determine the direction of blood flow and may not be sensitive enough to detect subtle changes in certain areas of the body.

Nov 10, 2010

Sarahf

I'm looking for references or some place where i can find the calculations that impedance plethysmography is based on.

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Nov 10, 2010

marcusl

Science Advisor

Gold Member

You can start with the chapter in this online textbook

http://www.bem.fi/book/25/25.htm"

Last edited by a moderator: May 5, 2017

FAQ: Physics underpinning Impedance Plethysmography

1. What is Impedance Plethysmography (IPG)?

Impedance Plethysmography (IPG) is a non-invasive medical technique used to measure changes in the volume of blood flow in the body. It works by measuring the electrical impedance of the tissues, which changes as blood flows through them.

2. How does IPG measure blood flow?

IPG works by emitting a small electrical current through the tissues and measuring the change in impedance caused by the presence of blood. The change in impedance is then used to calculate the volume of blood flow in the area being measured.

3. What is the physics behind IPG?

IPG is based on the principles of bioimpedance, which is the measurement of electrical properties of living tissues. The electrical impedance of a tissue is affected by its composition and the flow of blood through it. By measuring the changes in impedance, IPG can provide information about blood flow in the body.

4. What are the applications of IPG?

IPG is commonly used in clinical settings to monitor blood flow and diagnose conditions such as deep vein thrombosis, peripheral vascular disease, and venous insufficiency. It is also used in research to study changes in blood flow during exercise, sleep, and other physiological processes.

5. Are there any limitations to IPG?

While IPG is a useful tool for measuring blood flow, it does have some limitations. Factors such as body position, tissue composition, and electrode placement can affect the accuracy of the measurements. It is also not suitable for individuals with pacemakers or other implanted electronic devices. Additionally, IPG cannot provide information about the direction of blood flow, and it may not be sensitive enough to detect subtle changes in blood flow in certain areas of the body.