Background

Edema is swelling caused by excess fluid being trapped in different tissues. Leaking capillaries will cause fluid to gather in the surrounding tissue causing swelling. This will cause the kidneys to accumulate too much sodium and water to try and compensate for the lost fluid. This results in more blood being circulated throughout the body, causing more capillary leakage. Other causes of edema include congestive heart failure, liver disease, and blood clots. When edema is present, it can cause painful swelling and difficulty walking, as well as increasing heart rate and blood pressure. The goal of this project is to create a continuously monitoring sensor that can detect peripheral edema mainly in lower extremities. This would be accomplished by measuring the impedance between different areas on the legs and comparing the result to a known, healthy value.

 

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