Percutaneous stent assembly

Details Percutaneous stent assembly Percutaneous stent assembly

1992-06-15

1994-02-01

Pellegrino, Stephen C.

Surgery

Instruments

Internal pressure applicator

606191, 623 1, A61M 2900, A61F 206

Patent

active

052828247

ABSTRACT:
A self-expanding stent assembly consisting of one or more Z-stents connected to one another and covered by a flexible sleeve, which can be made from either nylon, plastic or another suitable material. The stents are formed of stainless steel wire arranged in a closed zig-zag configuration which includes an endless series of struts that are joined by an equal number of joints. The stent assembly is compressible into a reduced diameter size for insertion into, and possible removal from, a body passageway. After being properly positioned within a body passageway, the stent assembly is allowed to expand to its larger diameter shape, wherein the sleeve is pressed against the walls of the passageway by the stents. One application of the invention includes dilating a biliary duct which has been occluded by a tumorous growth. The advantage being that the sleeve prevents the tumor from growing between the gaps created by the stent which would otherwise restenose the passageway. Another intended application is to repair aneurysms. In this configuration, the stents are postioned on either side of an aneurysm, and the sleeve forms and artificial arterial wall which spans the aneurysm.

REFERENCES:
patent: 3657744 (1972-04-01), Ersek
patent: 4512338 (1985-04-01), Balko et al.
patent: 4580568 (1986-04-01), Gianturco
patent: 4776337 (1988-10-01), Palmaz
patent: 4830003 (1989-05-01), Wolff et al.
patent: 5035706 (1991-07-01), Gianturco et al.
patent: 5104404 (1992-04-01), Wolff
David Mirich et al., "Percutaneously Placed Endovascular Grafts for Aortic Aneurysms: Feasibility Study," Radiology 1989; 170:1033-1037.

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