Effects of Resting in Different Postures and Ankle Pump Movement on Hemodynamics of Deep Venous Blood Flow of Lower Limb

Purpose: The aim of this study was to provide evidence of individualized prevention of deep venous thrombosis (DVT) through evaluating venous hemodynamics of lower limb in response to ankle pump movement in different positions. Methods: Peak systolic velocity and mean flow velocity of common femoral vein were measured in 10 health volunteers (20 limbs) using color Doppler ultrasound in different positions, including at rest and when ankle pump movement were performed at lower limb elevation of 0, 15, 30, 45 degrees. Results: In the rest position, there were differences in the peak and mean femoral venous blood velocity among 0°, 15°, 30° and 45° (P=0.00, P=0.00); The Peak velocity of the common femoral venous blood flow was higher in lower limb elevate 30° (35.36±4.97) than 0° (23.38±2.23), 15° (28.45±3.01) and 45° (25.89±5.51). (P<0.05). The mean velocity of the common femoral venous blood flow was higher in lower limb elevate 30° (29.14±7.23) than 0° (20.20±2.51), 15° (23.67±4.52) and 45° (20.37±3.39). (P<0.05). In ankle pump movement position, the Peak velocity of the common femoral venous blood flow was higher in lower limb elevate 0° 47.35(41.35~57.18) than 15° 32.05(28.13~39.20), 30° 43.60(36.33~51.23), and 45° 29.80(27.15~36.08). However, there were no significant differences between either group(P>0.05). Conclusion: A better individualized prevention of DVT could be achieved through appropriate selection of position and ankle pump movement.

Keywords:Ankle pump movement; Position; Lower extremity; Venae profundae; Hemodynamics