Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1992-07-14
1993-11-16
Yasko, John D.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604266, 604280, 137845, A61M 2500, F16K 1514
Patent
active
052618854
ABSTRACT:
A closed-end catheter having a flat-surfaced valve positioned in a recess about the distal portion of the catheter for preventing retrograde flow of blood therethrough when positioned in a blood vessel of a patient. The valve catheter comprises a flexible material, cylindrical tube having a U-shaped outer wall extending longitudinally about the distal portion thereof. A flat-surfaced valve is positioned in the recess along the U-shaped distal portion and attached to the outer wall. The valve is formed by inserting a flat-surfaced rod in the U-shaped portion of the tube to stretch the outer wall. A flat-surfaced layer of flexible material is applied over the flat-surfaced rod to the stretched outer wall. The flexible material layer is cured and a longitudinal fluid aperture formed therein with the rod remaining in the passage of the U-shaped portion. The rod is then removed and a plug inserted into the passage to close the distal end of the catheter. The stretched outer wall of the U-shaped portion compresses the fluid aperture to a predetermined closed position to prevent fluid leakage therethrough.
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Cermak Adam J.
Cook Pacemaker Corporation
Godlewski Richard J.
Yasko John D.
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