A-V dialysis graft

Details A-V dialysis graft A-V dialysis graft

2007-09-24

2010-11-16

Deak, Leslie R (Department: 3761)

Surgery

Devices transferring fluids from within one area of body to...

With flow control means

C604S509000

Reexamination Certificate

active

07833186

ABSTRACT:
The present invention provides an apparatus and method for optimizing flow in an A-V dialysis graft having a selectable constricted section. Electronic pressure and flow sensors in the arterial and venous ends of the graft are electronically coupled to a monitor to detect the arterial and venous environments and change the degree of stenosis to optimize flow. The stenosis or narrowing within the graft creates resistance for the purpose of decreasing the flow rate and pressure at the outflow end. The selectable restricted section may be provided by a balloon or a thin “slit” type valve with flexible leaves to provide the required resistance. The “slit” valve allows access to wires or catheters for the purpose of any type of graft maintenance.

REFERENCES:
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patent: 5713859 (1998-02-01), Finch, Jr. et al.
patent: 6056717 (2000-05-01), Finch et al.
patent: 6146414 (2000-11-01), Gelman
patent: 6461321 (2002-10-01), Quinn
patent: 6585762 (2003-07-01), Stanish
patent: 2004/0249334 (2004-12-01), Cull

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