| 摘要 |
<p>A medical fluid suction device for selectively applying varied levels of suction pressure at a device tissue interface includes a direct "trumpet" type control mechanism in conjunction with a "venturi" type control. A valve manifold (300) is adapted to couple a vent pathway and a suction pathway (260) simultaneously to the vacuum conduit adapted for connection to a vacuum source. The amount of resistance to flow due to vacuum pressure is adjusted simultaneously in both the vent pathway and the suction pathway (26) in order to achieve controlled, selected levels of suction. Similarly shaped valve apertures are provided in inverse and reciprocal orientation along an axis of motion of a valve manifold (300).</p> |
