electrical impedance plethysmography

Electrical impedance plethysmography is to use a variety of plethysmographs to determine the degree of increase in the volume of the lower leg after the balloon is blocked by the femoral vein, and to remove the rate of decrease in the volume of the lower leg after the blockage, so that the venous patency of the lower extremity can be judged to determine the presence or absence of a vein. Thrombosis. Basic Information Specialist Category: Cardiovascular Examination Category: Other Examinations Applicable gender: whether men and women apply fasting: not fasting Tips: Do not eat too greasy, high-protein foods the day before, and avoid heavy drinking. Normal value When inhaling deeply, it can block the venous return of the lower extremities, making the calf blood easy to increase. When exhaled, the venous blood re-flows and the blood volume of the lower limbs returns to normal. Clinical significance Abnormal result In patients with deep venous thrombosis of the lower extremities, there was no significant change in calf blood volume during deep breathing. Need to check the crowd There are people with swollen limbs and pain and tenderness. Precautions Taboo before the test: Do not eat too greasy, high-protein foods the day before the test, to avoid heavy drinking. The alcohol content in the blood directly affects the test results. After 8 pm on the day before the medical examination, you should fast. Requirements for examination: When checking, you should relax your mind and avoid the contraction of blood vessels caused by fear. This test can correctly diagnose the thrombosis of larger veins, but the thrombosis of smaller veins of the lower leg is not effective. Inspection process A variety of plethysmographs were used to measure the volume of the lower leg after the balloon was blocked by the femoral vein. Not suitable for the crowd Generally there are no people who are not suitable. Adverse reactions and risks Generally no adverse reactions.