Method and apparatus for medical fluid transfer

Details Method and apparatus for medical fluid transfer Method and apparatus for medical fluid transfer

1992-08-24

1994-07-19

Hafer, Robert A.

Surgery

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

Treating material introduced into or removed from body...

604 86, 604 4, 604175, A61M 500

Patent

active

053304489

ABSTRACT:
This invention relates to a method and apparatus for transferring a selected fluid in a selected direction to and from a selected body area of a medical patient. More particularly, this invention involves a surgically implanted catheter which is sealed at its proximal end with a material which may be repeatedly punctured by a needle and which reseals when the needle is removed. A needle attached through tubing to a suitable source or sink of the fluid pierces the seal and is latched thereto by suitable means. A noninvasive pump is provided to maintain a desired flow rate. To enhance seal life, a disposable seal portion may be provided having a needle which pierces the seal at the end of the catheter and is latched thereto and having a seal at its proximal end which may be pierced by the needle attached to the source or sink of fluid. When the seal on the disposable section wears out, this section may be removed and replaced, permitting the seal on the surgically implanted catheter to remain for an extended period of time. Various techniques are also provided for replacing the seal at the end of the catheter if necessary.

REFERENCES:
patent: 4184497 (1980-01-01), Kolff et al.
patent: 4464178 (1984-08-01), Dalton
patent: 4496349 (1985-01-01), Consentino
patent: 4585436 (1986-04-01), Davis et al.
patent: 4726381 (1988-02-01), Jones
patent: 4781693 (1988-11-01), Martinez et al.
patent: 4810241 (1989-03-01), Rogers
patent: 4966582 (1990-10-01), Sit et al.

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