What is the normal venous blood flow velocity in the lower limbs

The normal range of lower limb venous blood flow velocity is 10-30 centimeters per second, and the specific value may fluctuate slightly due to differences in the testing site, position, and individual.

Lower limb venous blood flow velocity is an important indicator for evaluating venous function, usually measured through ultrasound Doppler examination. At rest, the blood flow velocity in the femoral vein is about 15-30 centimeters per second, and slightly lower in the popliteal vein at 10-20 centimeters per second. When in a supine position, blood flow velocity is slower, but it can temporarily increase due to muscle pumping after standing or moving. The blood flow velocity of healthy individuals is influenced by factors such as age, body temperature, and exercise status. Young people and those who exercise regularly tend to have faster blood flow velocity. During testing, it is necessary to maintain a relaxed state to avoid errors caused by clothing compression or improper positioning. If the blood flow velocity remains below 10 centimeters per second, it may indicate obstruction of venous return, and a comprehensive judgment should be made based on indicators such as venous valve function and vascular patency. Patients who are bedridden for a long time, have venous thrombosis or varicose veins may experience abnormal blood flow velocity. However, if a single measurement result is abnormal, there is no need to worry excessively. It needs to be evaluated by a specialist doctor based on clinical symptoms and other examination results.

Daily promotion of lower limb venous return can be achieved through regular exercise, avoiding prolonged sitting and standing, and wearing medical elastic socks. When swelling, pain, or skin discoloration occurs in the lower limbs, timely medical attention should be sought, and examinations such as lower limb venous ultrasound should be completed to confirm the diagnosis.