Hemodialysis and vascular access system

a vascular access system and hemodialysis technology, applied in the direction of catheters, applications, other blood circulation devices, etc., can solve the problems of cumbersome living, cosmetically unappealing, and the failure of veins or shunts to enlarge and mature properly, so as to reduce turbulence and shear force, and improve longevity and performance.
USRE44639E1Inactive Publication Date: 2013-12-10MERIT MEDICAL SYST INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
MERIT MEDICAL SYST INC
Publication Date
2013-12-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

A hemodialysis and vascular access system comprises a subcutaneous composite PTFE silastic arteriovenous fistula having an indwelling silastic venous end which is inserted percutaneously into a vein and a PTFE arterial end which is anastomosed to an artery. Access to a blood stream within the system is gained by direct puncture of needle(s) into a needle receiving site having a tubular passage within a metal or plastic frame and a silicone upper surface through which needle(s) are inserted. In an alternate embodiment of the invention, percutaneous access to a blood stream may be gained by placing needles directly into the system (i.e. into the PTFE arterial end). The invention also proposes an additional embodiment having an arterialized indwelling venous catheter where blood flows from an artery through a tube and a port into an arterial reservoir and is returned to a vein via a port and a venous outlet tube distinct and distant from the area where the blood from the artery enters the arterial reservoir. The site where blood is returned to the vein is not directly fixed to the venous wall but is free floating within the vein. This system provides a hemodialysis and venous access graft which has superior longevity and performance, is easier to implant and is much more user friendly.
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Description

[0001] This application is a CONTINUATION REISSUE APPLICATION of U.S. application Ser. No. 10 / 219,998 now U.S. Pat. No. Re. 41,448, which is a REISSUE APPLICATIONS of U.S. Pat. No. 6,102,884, which issued on Aug. 15, 2000, and which claims benefit under 35 U.S.C. Section 119(e) to U.S. Application No. 60 / 037,094, filed on Feb. 3, 1997, all of which are incorporated herein by reference in their entirety.

[0002] Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No. 6,102,884. The reissue applications include this application, U.S. application Ser. No. 11 / 417,658, and U.S. application Ser. No. 10 / 219,998. This application is a CONTINUATION REISSUE APPLICATON of Ser. No. 10 / 219,998, which is a REISSUE APPLICATION of U.S. Pat. No. 6,102,884.BACKGROUND OF THE INVENTION

[0003] Currently, HD (hemodialysis) and vascular access for chemotherapy and plasmapheresis is achieved in one of several ways. Applicant's invention involves a new method and instrumentation ...

Claims

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