Reference Search
| Improved venous return by elliptical, sequential and seamless air-cell compression |
| Source: Labropoulos N, Oh DS, Golts E, et al: International Angiology 22(3): 317–321, 2003 |
| Summary: VenaFlow’s rapid-filling, sequential inflation cycle and seamless, overlapping, elliptical designed cuffs are essential for producing peak velocities that are superior to other sequential devices. In this study, the author compared the Kendall Thigh SCD and VenAssist (ArtAssist) hemodynamics to the VenaFlow (calf) System. “Two hemodynamic parameters were measured, acceleration time from spontaneous baseline venous flow and peak vein velocity. Measurements were taken proximal to the saphenofemoral junction in the common femoral vein in both extremities for each subject.” In 20 subjects, VenaFlow produced peak velocities that averaged 328% above baseline, more than the other devices. “Peak velocity and sheer stress have been shown to increase in sequential compression models, decreasing stasis and increasing fibrinolytic activity, including activation of tPA.” The authors conclude that the design of the cuffs and the rapid acceleration of the system correlates with the greater velocity. Velocity is regarded as the most important performance indicator of all the hemodynamic parameters. |