| 摘要 |
<p>The present invention is directed to a vascular assist device (21) which maintains a static graduated pressure as the minimum pressure at all times during use. The present invention incorporates at least two inflatable chambers (48, 50) which wrap around selected portions of a limb. The inflatable chambers (48, 50) apply elevated pressure to selected portions of a limb to disgorge blood therefrom. The inflatable chambers (48, 50) also apply static pressure which is graduated from distal to proximal along selected portions of a limb. A desired pressure level is generated and maintained in a pressure accumulator (22), and a pressure regulator (34) and regulator valve (36a, 36b, 36c) control the pressure in the inflatable chambers (48, 50) of the inflatable chambers (48, 50). The inflatable chambers (48, 50) are inflated to a predetermined and uniform dynamic pressure which is maintained in the inflatable chambers (48, 50) for a predetermined amount of time. The pressure is then decreased to a static pressure level which is graduated in pressure from the most distal inflatable chamber (48, 50) to the most proximal inflatable chamber (48, 50). The cycle is repeated after maintaining graduated static pressure for about forty five seconds.</p> |
