Check valve catheter

Details Check valve catheter Check valve catheter

1981-03-19

1987-04-14

Truluck, Dalton L.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604 9, 137860, A61M 2500

Patent

active

046575367

ABSTRACT:
A catheter having a tip which is resistant to plugging by blood components or other body fluids when used as a long term implant within a living body. A check valve is incorporated in the tip that is exposed to the blood stream or other body fluids. The central bore within the catheter is closed at its downstream end. A cross bore or port is provided immediately upstream from the closed end. This cross bore is covered by a thin elastic sleeve to create a check valve. The pressure developed by injected infusate through the catheter opens the valve against the elastic force of the outer sleeve. Fluids cannot enter the catheter either by diffusion against the high velocity exit flow or by suction applied to the proximal end of the catheter.

REFERENCES:
patent: 3288901 (1966-11-01), Clark
patent: 3384113 (1968-05-01), Pennisi
patent: 3731681 (1973-05-01), Dorman
patent: 3885561 (1975-05-01), Cami
patent: 3888249 (1975-06-01), Spencer
patent: 3995617 (1976-12-01), Watkins et al.
patent: 4063555 (1977-12-01), Ulinder

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