Hemodialysis access method for a patient
OwnerStan Batiste, Daniel Batisteinventors
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Abstract
An elastic dialysis stent comprises a central restrictor segment located between two tapered segments. The tapered segments are tapered from a larger diameter suitable for joining to tubular graft segments or attaching the stent in a graft or fistula, to the narrower diameter of the elastic central restrictor segment which provides a stenosis. The central restrictor is made of an elastic material which enables the stent to be radially expanded by a balloon catheter to a larger diameter for passage of endovascular devices through the stent for repair of blockages on the venous side of the stent. When the balloon catheter is deflated and removed, the elastic properties of the stent cause it to retract to its original stenotic configuration.
Claims25
A hemodialysis access method for a patient, comprising:
- deploying a dialysis stent within an arterial venous (AV) fistula or graft, the dialysis stent having an expandable restriction and comprising a shunt tube and at least one elastic restrictor, the shunt tube having an inlet end, an outlet end, and a central opening extending from the inlet end to the outlet end such that the central opening has a first diameter, the at least one elastic restrictor extending around a portion of the shunt tube located between the inlet end and the outlet end, the at least one elastic restrictor narrowing the central opening in order to create a stenosis in the shunt tube that acts as a flow restrictor for allowing the shunt tube to elastically shunt blood flow from an extremity of the patient, and in order to create a reduced diameter section of a second diameter in the shunt tube that is elastically adjustable from the second diameter, which is less than the first diameter, to a third diameter that is greater than the second diameter such that the stenosis expands when the shunt tube moves from having the second diameter to having the third diameter;
- and
- elastically adjusting the at least one elastic restrictor from the second diameter to the third diameter responsive to a balloon inflating to expand the at least one elastic restrictor, and from the third diameter back to the second diameter responsive to the balloon subsequently deflating.
Dependencies are inferred from the claim text.