Bypass anti-siphon valve and method

• US 20030014011A1
• Filed: 07/12/2001
• Published: 01/16/2003
• Est. Priority Date: 07/12/2001
• Status: Abandoned Application

• Current Assignee: Deltek, Inc. (Roper Technologies, Inc.)
• Original Assignee: Deltek, Inc. (Roper Technologies, Inc.)
• Inventors: Robert, Renee Joy
• Application Number:
  US09/905,257
• Publication Number:
  US 20030014011A1
• Time in Patent Office: Days
• US Class Current: 604/128
• CPC Class Codes: A61M 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: A61M 39/281 Automatic tube cut-off devices, e.g. squeezing tube on detection of air
• CPC Class Codes: A61M 5/14212 Pumping with an aspiration and an expulsion action
• CPC Class Codes: Y10T 137/87563 With reverse flow direction

Abstract

A pump system includes a pump control module and a cassette with a tube including an anti-siphon valve. A valve operates to control free flow situations, and the valve further has a bypass for priming of the system. The valve includes a bypass mechanism including at least one activation member, such as a button, which moves a movable member for disrupting the seal member of the anti-siphon valve. An alternative valve includes a separate bypass pathway around the anti-siphon valve. In this embodiment, operation of the bypass pathway does not disturb or disrupt the seal of the anti-siphon valve. Operation of the alternative bypass pathway is through a bypass mechanism including a button for movement or disruption of a bypass seal. A cap or other holder opens the bypass for each of the valves for gravity priming. A cassette includes a holder for holding an in-line anti-siphon valve with bypass in the open position, wherein the anti-siphon valve interferes with attachment of the cassette to the pump while in the holder.

Claims

1. A valve comprising:

an anti-siphon valve including an inlet, an outlet, and a seal positioned within the valve between the inlet and the outlet to allow one-way fluid flow between the inlet and the outlet at a fluid pressure above a crack pressure;

a bypass mechanism including a movable member biased to a closed position away from contact with the seal of the anti-siphon valve, the movable member movable to an open position in contact with the seal of the anti-siphon valve to prevent the formation of a seal between the inlet and the outlet, wherein the bypass mechanism includes a moveable activation member on an exterior of the anti-siphon valve.

2. The valve of claim 1, further comprising a flexible conduit for delivering fluid, the inlet permanently connected to the conduit.

3. The valve of claim 2, further comprising a cap positioned over the outlet and engaged with the activation member of the bypass mechanism to hold the movable member in the open position.

4. The valve of claim 3, wherein the cap includes a plurality of ridges disposed on an inner surface of the cap engaged with an exterior surface of the anti-siphon valve.

5. A valve comprising:

an anti-siphon valve including an inlet, an outlet, and a seal positioned within the valve between the inlet and the outlet to allow one-way fluid flow between the inlet and the outlet at a fluid pressure above a crack pressure;

a bypass pathway within the valve linking the inlet to the outlet and bypassing the seal of the anti-siphon valve without disrupting the seal;

a bypass seal positioned in the bypass pathway to selectively seal the bypass pathway, wherein the bypass seal is movable between a sealed position and an unsealed position;

a bypass mechanism for moving the bypass seal between sealed and unsealed positions.

6. The valve of claim 5, further comprising a flexible conduit for delivering fluid, the inlet permanently connected to the conduit.

7. The valve of claim 6, wherein the bypass mechanism includes a movable member biased to a closed position, and movable to an open position for moving the bypass seal from the sealed to the unsealed position, wherein the bypass mechanism includes a moveable activation member on an exterior of the anti-siphon valve.

8. The valve of claim 7, further comprising a cap positioned over the outlet and engageable with the activation member of the bypass mechanism to hold the bypass mechanism in the open position.

9. The valve of claim 8, wherein the cap includes a plurality of ridges disposed on an inner surface of the cap engageable with an exterior surface of the anti-siphon valve.

10. The valve of claim 5, wherein the bypass mechanism includes a movable member biased to a closed position, and movable to an open position for moving the bypass seal from the sealed to the unsealed position, wherein the bypass mechanism includes a moveable activation member on an exterior of the anti-siphon valve.

11. A tube set comprising:

a flexible conduit for delivering fluid;

an anti-siphon valve including an inlet permanently connected to the conduit, an outlet, and a seal positioned within the valve between the inlet and the outlet to allow one-way fluid flow between the inlet and the outlet at a fluid pressure above a crack pressure;

a bypass mechanism for allowing free flow when the bypass mechanism is moved from a closed position to an open position, the bypass mechanism biased to the closed position, and operable through an activation member;

a cap positioned over the outlet to engage the activation member and hold the bypass mechanism in the open position.

12. The tube set of claim 11, wherein the cap includes a plurality of ridges disposed on an inner surface of the cap engageable with an exterior surface of the anti-siphon valve.

17. The cassette of claim 16, further comprising a downstream conduit permanently connected to the outlet of the anti-siphon valve.

13. A method of pumping fluid through a tube set comprising the steps of:

providing a fluid conduit with a distal end having an anti-siphon valve permanently mounted to the distal end of the conduit;

moving a movable member on the anti-siphon valve by engaging an exterior surface of the anti-siphon valve, wherein the movable member moves against a bias force to disrupt a seal member of the anti-siphon valve

resealing the seal member of the anti-siphon valve;

pumping fluid through the anti-siphon valve to a patient from a pump.

14. A method of pumping fluid through a tube set comprising the steps of:

providing a fluid conduit with a distal end having an anti-siphon valve permanently mounted to the distal end of the conduit;

moving a movable member to open a bypass pathway around the sealed anti-siphon valve;

resealing the bypass pathway;

pumping fluid through the anti-siphon valve to a patient from a pump.

15. A method of pumping fluid through a tube set comprising the steps of:

providing a fluid conduit with a distal end having an anti-siphon valve permanently mounted to the distal end of the conduit;

providing a cap on an outlet of the anti-siphon valve;

connecting the conduit to a pump;

priming the conduit by removing air through the outlet with the cap positioned on the outlet;

removing the cap from the end of the primed conduit.

16. A cassette comprising:

a cassette housing attachable to a pump control module, the cassette housing including a top surface;

a flexible conduit positioned along the top surface;

an anti-siphon valve including an inlet permanently connected to the conduit, an outlet, and a seal positioned within the valve between the inlet and the outlet to allow one-way fluid flow between the inlet and the outlet at a fluid pressure above a crack pressure;

a bypass mechanism for allowing free flow when the bypass mechanism is moved from a closed position to an open position, the bypass mechanism biased to the closed position, and operable through an activation member;

the top surface defining a holder for the anti-siphon valve, the holder engageable with the activation member to hold the bypass mechanism in the open position.

18. A method of filling a cassette providing the steps of:

providing a cassette including an in-line anti-siphon valve permanently connected between an upstream flexible conduit and a downstream flexible conduit;

mounting the anti-siphon valve to a top surface of the cassette, wherein the cassette holds a bypass mechanism in an open position to allow free flow through the anti-siphon valve;

filling a fluid reservoir with fluid disposed in an interior chamber of the cassette and connected to the upstream flexible conduit by filling the fluid through the downstream flexible conduit, the anti-siphon valve, and the upstream flexible conduit and into the fluid reservoir.