IV fluid delivery system
First Claim
Patent Images
1. A pump for delivering fluid through a resilient, deformable tube, comprising:
- first and second support means for supporting said tube;
pinching means for occluding said tube against said first support means and then releasing said tube;
pumping means for deforming said tube against said first support means, so that fluid is pumped through said tube;
restoring means for applying force on said tube against said second support means, so that said tube is urged to restore said tube'"'"'s cross-sectional shape; and
drive means for actuating said pinching means and said pumping means and said restoring means.
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Abstract
An IV fluid delivery system for use in connection with a resilient, deformable tube, wherein pinching fingers occlude the tube and pumping fingers deform the tube (without occluding it) against a first pressure pad or support means in a pumping action, while restoring fingers urge the tube against a second pressure pad or support means to restore its cross-sectional shape, so as to improve the accuracy, consistency, and predictability of flow through the tube.
53 Citations
15 Claims
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1. A pump for delivering fluid through a resilient, deformable tube, comprising:
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first and second support means for supporting said tube; pinching means for occluding said tube against said first support means and then releasing said tube; pumping means for deforming said tube against said first support means, so that fluid is pumped through said tube; restoring means for applying force on said tube against said second support means, so that said tube is urged to restore said tube'"'"'s cross-sectional shape; and drive means for actuating said pinching means and said pumping means and said restoring means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A pump for delivering fluid through a resilient, deformable tube, comprising:
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a first pressure pad; a second pressure pad; a plurality of pinching fingers that apply force to occlude said tube against said first pressure pad; a plurality of pumping fingers to apply force to deform said tube against said first pressure pad without occluding said tube; a plurality of restoring fingers to apply force on said tube against said second pressure pad to urge said tube to restore said tube'"'"'s cross-sectional shape; and a motor for actuating said pinching fingers and said pumping fingers and said restoring fingers. - View Dependent Claims (12, 13, 14)
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15. A method for delivering fluid through a resilient, deformable tube in a pump having first support means and second support means for supporting said tube, drive means for generating a pumping action on said tube, pinching means operatively engaged with said drive means for applying force on said tube to occlude said tube, pumping means operatively engaged with said drive means for applying force on said tube without occluding said tube, restoring means operatively engaged with said drive means for applying force on said tube against said second support means to urge the restoration of the cross-sectional shape of said tube, said method comprising:
placing said tube against said first support means, advancing said pinching means to occlude said tube under the force of said pinching means and retracting said pinching means, advancing said pumping means on said tube to compress said tube under the force of said pumping means and retracting said pumping means, and urging said occluded or compressed tube to restore its cross-sectional shape under the force of said restoring means.
Specification