APPARATUS AND METHOD FOR A COMBINATION VALVE

摘要

A combination valve in a side port adapter prevents back flow through the side port and through a main channel has an adapter (11) with a main channel (13) along an axis thereof. The adapter has a side port (12) that intersects with the main channel for flow therethrough. A resilient member (19) with a passage therethrough has therein a check valve located normal to the axis and across the passage. The check valve opens with flow along the axis in a direction and closes to flow in an opposite direction. The resilient member normally closes the intersection until the member deflects when fluid pressure within the side port exceeds its resiliency. The check valve is a web across the passage with a slit that is normally closed. The web shape is a duck bill. The main channel has an inlet and an outlet positioned along the axis. The outlet can be connected for fluid tight communication to a catheter or other fluid line. The inlet is in fluid communication with a fluid supply to provide flow through the main channel to the outlet. The resilient member and the main channel have a cylindrical shape of a circular cross section. The resilient member has an edge at a distal end thereof. The adapter has an annular shoulder within the main channel distal along the axis and relative to the side port to locate the edge. A method has the steps of providing an adapter with a main channel and a side port, placing a resilient member having a passage therethrough in the main channel to prevent flow from 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 one direction and prevent flow in the opposite direction. The valve and adapter are packed and sterilized.