Apparatus and method for a side port cathether adapter with a one piece integral combination valve
First Claim
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1. A combination valve for a side port adapter for a catheter to prevent back flow through the side port and through a main channel comprising:
- an adapter having an axis with an inlet and an outlet associated with a main channel along the axis thereof, the adaptor including a side port having an intersection with the main channel to provide access for flow therethrough; and
a substantially cylindrical resilient member, serving as a one-piece, integrally formed bifunctional valve, having a passage therethrough and having disposed therein substantially normal to the axis and across the passage a check valve which opens when subject to flow in a direction along the axis from the inlet to the outlet and substantially closed to flow in an opposite direction, the substantially cylindrical resilient member closing the side port intersection with the main channel be the resiliency of the member which maintains its cylindrical shape until the intersection open under fluid pressure from the side port exceeding the resiliency which keeps the member cylindrical.
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Abstract
A catheter adapter, with a side port connection, contains a one-piece integral bifunctional resilient combination valve which serves to prevent back flow from the patient. It allows infusion from either the primary axial port or from the side port and provides automatic shut-off when the infusion pressure becomes lower than the ambient pressure in the patient'"'"'s body from either port.
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Citations
18 Claims
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1. A combination valve for a side port adapter for a catheter to prevent back flow through the side port and through a main channel comprising:
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an adapter having an axis with an inlet and an outlet associated with a main channel along the axis thereof, the adaptor including a side port having an intersection with the main channel to provide access for flow therethrough; and a substantially cylindrical resilient member, serving as a one-piece, integrally formed bifunctional valve, having a passage therethrough and having disposed therein substantially normal to the axis and across the passage a check valve which opens when subject to flow in a direction along the axis from the inlet to the outlet and substantially closed to flow in an opposite direction, the substantially cylindrical resilient member closing the side port intersection with the main channel be the resiliency of the member which maintains its cylindrical shape until the intersection open under fluid pressure from the side port exceeding the resiliency which keeps the member cylindrical. - View Dependent Claims (2, 3, 4, 5)
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6. A combination valve for a side port adapter to prevent back-flow through the side port and through a main channel comprising:
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an adapter having a main channel along an axis thereof, the adapter including a side port having an intersection with the main channel to provide access for flow therethrough; and a cylindrical resilient member serving as a one-piece integrally formed bifunctional valve with a passage therethrough and having disposed therein substantially normal to the axis and across the passage, a check valve which opens with flow along the axis in a direction and closes to flow in an opposite direction, the resilient member normally against the intersection to hold the intersection closed until the member deflects and opens under fluid pressure from the side port that exceeds the resiliency of the member.
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7. A combination valve for a side port adapter to prevent back-flow through the side port and through a main channel comprising:
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an adapter having a cylindrically shaped main channel along an axis thereof, the adapter including a side port having an intersection with the main channel to provide access for flow therethrough; and a resilient member having a cylindrical shape sized to fit the main channel, serving as a one-piece integrally formed bifunctional valve with a passage therethrough and having disposed therein, substantially normal to the axis across the passage, a check valve which opens with flow along the axis in a first direction and closes to flow in a second, opposite direction, the resilient member normally against the intersection to hold the intersection closed until the member deflects and opens under fluid pressure from the side port that exceeds the resiliency of the member. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of providing a combination valve in a side port adapter to prevent back flow through a main channel therein and through a side port thereof including the following steps:
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providing an adapter with a main channel and a side port with an intersection with the main channel; placing a cylindrical resilient member, serving as a one-piece integrally formed bifunctional valve, having a passage therethrough in the main channel to cover the intersection and prevent flow from an outlet of the main channel to the side port, and providing a duck bill check valve in the passage to permit flow through the main channel in a direction and prevent flow in the opposite direction. - View Dependent Claims (17, 18)
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Specification