| 摘要 |
<p>A cassette (12) which is adapted to be insertable into and removable from an infusion pump (10). The cassette (12) has a housing, a length of flexible tubing (40) supported by the housing, and a vertically movable member (64) disposed in the housing. The movable member (64) has a slot formed therein, and a portion of the flexible tubing (40) is disposed within the slot. The member (64) is movable between a clamped position in which the flexible tubing (40) is clamped to prevent any substantial liquid flow therethrough and an unclamped position in which substantial liquid flow through the flexible tubing (40) is enabled, and a spring is provided for biasing the member (64) to the clamped position. The movable member (64) may be designed so that the closure of a door of the infusion pump (10) in which the cassette is inserted will cause the member (64) to be in the unclamped position to allow liquid flow through the flexible tubing (40). The cassette (12) may have means for maintaining the member (64) in the unclamped position, such as a retaining pin. The cassette (12) has a second vertically movable member (44) with a first surface (46) and a second surface (42). The first surface (46) has a portion which is arcuate in shape and adapted to substantially conform with a path of rotation defined by the rotary pump wheel of the infusion pump (10). The second surface (42) of the second movable member (44) is disposed within the aperture formed in the upper surface of the housing so that the second member (44) may be vertically displaced due to physical contact with the second surface (42) of the member (44).</p> |
