Pressure activated proximal valves

摘要

A medical device is disclosed comprising a diaphragm having at least one slit valve disposed therein, and a valve housing configured to secure the diaphragm at a peripheral portion of the diaphragm, wherein a central portion of the diaphragm is positioned relative to the peripheral portion of the diaphragm such that compressive forces acting on the peripheral portion of the diaphragm create moment forces which bias the slit valve in a closed position. A method is disclosed for using the device in connection with a catheter for regulation of fluids to and from a patient.

主权项

1. A pressure-activated valve for regulating fluid flow through a catheter comprising:
a valve for selectively accommodating flow of liquid through the catheter, the flow of a first liquid passing in one direction through a central slit in response to a first pressure differential and the flow of a second liquid in an opposite second direction through a first lateral slit in response to a second pressure differential, the second liquid including at least one body fluid, the valve including a dome-shaped portion having the central slit disposed thereon, a first lateral region adjacent a first side of the dome-shaped portion having the first lateral slit disposed thereon, and a peripheral portion; and a valve housing configured to secure the peripheral portion of the valve.