| Objective To investigate the effect of air wave pressure therapeutic equipment on the hemodynamics of lower limb deep veins, so as to analyze the optimum pressure for enhancement of lower limb blood reflux and the sustained time of therapeutic effect.Methods From May 2015 to Feb 2016, 15 healthy volunteers from our hospital were selected, and by color Doppler ultrasonography, their peak venous velocity, average venous velocity and blood flow in the left femoral vein were evaluated at different times under different treatment pressures (40 mmHg, 60 mmHg, 80 mmHg, 100 mmHg) of the air wave pressure therapeutic equipment. Results After intermittent pneumatic compression (IPC), the peak venous velocity, average venous velocity and blood flow under different treatment pressures were all significantly higher than those in the resting state (all P<0.05), but these hemodynamic indexes gradually returned to the resting level before IPC with the extension of time. There was no significant difference in the peak venous velocity, average venous velocity and blood flow in the resting state (P>0.05), but these hemodynamic indexes were found to be significantly different under the four treatment pressures at 40 minutes after IPC (P<0.05), and again to be indifferent at 60 minutes after IPC (P>0.05). Conclusion Under the IPC pressure of 80 mmHg, the effect of air wave pressure therapeutic equipment on improving vein reflux would be optimum and can last for 40 minutes, so it should be identified as one of the preferences for use of this therapeutic equipment in the future clinical rehabilitation. |
