INFUSION PUMP CASSETTE WITH ANTI-FREE-FLOW VALVE MECHANISM
First Claim
Patent Images
1. A cassette for engagement with an infusion pump for delivery of a fluid to a subject comprising:
- a housing having first and second ends for holding flexible tubing through which the fluid is directed, the tubing is configured for engaging a pumping mechanism of an infusion pump that moves the fluid through the tubing;
an anti-flow valve mechanism that is biased against the tubing in a fluid non-delivery position to prevent flow therethough;
a member operatively associated with the anti-flow valve mechanism to overcome the force-applying member bias to allow flow of fluid through the tubing when the housing is engaged with the pump; and
the housing is configured and dimensioned for engagement with the infusion pump, wherein during or after engagement the member assumes a fluid delivery position to allow flow of the fluid through the tubing, while before or as the cassette is removed from the pump, the member assumes the fluid non-delivery position to prevent flow of fluid through the tubing.
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Accused Products
Abstract
A cassette (1) that is insertable into an infusion pump for delivery of a fluid to a subject that has a housing with two ends for holding flexible tubing (75) through which the fluid is directed. The housing has an open area exposing the tubing, which engages a pumping mechanism when inserted into an infusion pump. An anti-flow valve mechanism (100) associated with the tubing or the cassette and present either in, on or near the housing is made up of a piston (103/105) and spring (110), where the spring biases the piston against the tubing to prevent fluid flow.
42 Citations
19 Claims
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1. A cassette for engagement with an infusion pump for delivery of a fluid to a subject comprising:
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a housing having first and second ends for holding flexible tubing through which the fluid is directed, the tubing is configured for engaging a pumping mechanism of an infusion pump that moves the fluid through the tubing; an anti-flow valve mechanism that is biased against the tubing in a fluid non-delivery position to prevent flow therethough; a member operatively associated with the anti-flow valve mechanism to overcome the force-applying member bias to allow flow of fluid through the tubing when the housing is engaged with the pump; and the housing is configured and dimensioned for engagement with the infusion pump, wherein during or after engagement the member assumes a fluid delivery position to allow flow of the fluid through the tubing, while before or as the cassette is removed from the pump, the member assumes the fluid non-delivery position to prevent flow of fluid through the tubing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A fluid delivery system comprising:
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a cassette for engagement with an infusion pump for delivery of a fluid to a subject comprising a housing having first and second ends for holding flexible tubing through which the fluid is directed, the tubing is configured for engaging a pumping mechanism of an infusion pump that moves the fluid through the tubing, an anti-flow valve mechanism that is biased against the tubing in a fluid non-delivery position to prevent flow therethough, a member operatively associated with the anti-flow valve mechanism to overcome the force-applying member bias to allow flow of fluid through the tubing when the housing is engaged with the pump, and the housing is configured and dimensioned for engagement with the infusion pump, wherein during or after engagement the member assumes a fluid delivery position to allow flow of the fluid through the tubing, while before or as the cassette is removed from the pump, the member assumes the fluid non-delivery position to prevent flow of fluid through the tubing; and infusion pump comprising a pump housing having an opening configured and dimensioned to receive or engage with the cassette and an activation mechanism for engaging the member and thereby causing the member to move between the fluid non-delivery position and the fluid delivery position to allow fluid flow through the tubing, and the pumping mechanism that engages the flexible tubing to provide movement of fluid through the tubing only when the cassette is engaged with the pump, the pump detects engagement of the cassette, and the member is in the fluid delivery position. - View Dependent Claims (10, 11, 12, 13)
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- 14. A method of preventing a free flow of fluid through a tubing of an infusion set comprising providing the tubing in a cassette that engages an infusion pump for delivery of a fluid to a subject, and providing the tubing or cassette with an anti-flow valve mechanism comprising a moveable member and force-applying member wherein, when not engaged with the pump, the moveable member and force-applying member are maintained in a fluid non-delivery position with the force-applying member biasing the moveable member against the tubing to prevent flow therethrough, and when or after the cassette engages the pump, the force-applying member is moved by the pump to a flow delivery position where the moveable member is not biased against the tubing to allow fluid to flow therethrough.
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18. An anti-flow valve mechanism preventing free-flow of fluid through the tubing of an infusion set, the anti-flow valve mechanism having a housing and comprises a moveable member and force-applying member wherein, when not engaged with a pump, the moveable member and force-applying member are maintained in a fluid non-delivery position with the force-applying member biasing the moveable member against a tubing to prevent flow therethrough, and when or after the cassette engages the pump, the force-applying member is moved by the pump to a flow delivery position where the moveable member is not biased against the tubing to allow fluid to flow therethrough.
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19. (canceled)
Specification