A Novel Method for Blood Flow Measurement using Plethysmography

The objective of the project is to measure the blood flow in human limbs and to study the blood flow characteris- tics using an innovative methodology called Impedance plethysmography. It is also called as impedance test or blood flow or impedance phlebography. It is a non-inva- sive test that uses electrical monitoring in the form of resistance (impedance) changes to measure blood flow in veins of the leg. Information from this test helps doc- tors detect deep vein thrombosis. Using conductive jelly; the examiner strategically places two or four electrodes on the patient's calf. These electrodes are used to mea- sure the impedance of the body and it is amplified. It is used to detect blood clots lodged in the deep veins of the leg, Screen patients who are likely to have blood clots in the leg, Detect the source of blood clots in the lungs (pul- monary emboli). It measures the blood volume changes in the human physiology which is used to detect the car- diovascular problems in the human.