Q: What does it mean by graded compression stockings for DVT (deep venous thrombosis) prophylaxis?
Answer: Compression stockings are made of strong elastic material and fit tightly at the feet and gradually become less tight at the knee/thigh. The pressure in the stockings is graded and this allows for the stockings to constantly squeeze the leg muscles. This pressure gradient (high pressure at ankle level minus low pressure level at thighs) helps to drive blood back to the heart, reduce swelling in the feet and prevent blood clot formation. They come in various strengths. 18 mm Hg at ankle level with 8 mm Hg at thigh level - giving gradient of 10 mm Hg is considered standard for DVT prophylaxis.
Related previous pearl: inflation and deflation cycle of intermittent pneumatic compression boots
