Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Stent structure
Patent
1997-01-24
1998-12-01
Prebilic, Paul B.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Arterial prosthesis
Stent structure
623 12, 606198, 600 29, A61F 206
Patent
active
058431713
ABSTRACT:
A tube of porous PTFE having at least two first and at least two second regions wherein the at least two first regions have a greater density than the at least two second regions. For tubes of porous expanded PTFE having a microstructure of nodes interconnected by fibrils, the at least two first regions have a mean fibril length that is less than that of the at least two second regions. Preferably the regions are arranged in the form of ring-shaped segments of the tube wherein denser segments alternate along the length of the tube with less dense segments. Other arrangements between the different regions are possible; for example, the regions may be oriented in a spiral relationship with each other along the length of the tube. The porous PTFE tubes of the present invention have excellent radial compression resistance without requiring additional exterior reinforcing members due to the presence of the denser regions that are provided with a circumferential orientation. Tubes of this type are anticipated to be useful as vascular grafts and particularly as intraluminal vascular grafts. When provided as an intraluminal graft, the tube may also optionally be manufactured to be circumferentially distensible to a larger diameter up to a maximum diameter beyond which it will not distend during normal use; such a tube can also be made to recoil minimally on the release of the distending force. The tube may be used in in situ bypass procedures to hold venous valves open and to occlude tributary branches.
REFERENCES:
patent: 3626947 (1971-12-01), Sparks
patent: 4208745 (1980-06-01), Okita
patent: 4248924 (1981-02-01), Okita
patent: 4280500 (1981-07-01), Ono
patent: 4332035 (1982-06-01), Mano
patent: 4550447 (1985-11-01), Seiler, Jr. et al.
patent: 4647416 (1987-03-01), Seiler, Jr. et al.
patent: 4701362 (1987-10-01), Suzuki et al.
patent: 4730088 (1988-03-01), Suzuki
patent: 4877661 (1989-10-01), House et al.
patent: 5026513 (1991-06-01), House et al.
patent: 5308664 (1994-05-01), House et al.
patent: 5443909 (1995-08-01), Martakos et al.
patent: 5466509 (1995-11-01), Kowligi et al.
patent: 5474824 (1995-12-01), Martakos et al.
patent: 5476505 (1995-12-01), Limon
patent: 5609626 (1997-03-01), Quijano et al.
SRRT Thin Walled FEP Ringed GORE-TEX.RTM. Stretch Vascular Graft with Removable Rings Product Brochure. W. L. Gore & Associates, Inc. 1995.
Rosenfeld JC et al. Endothelial Infiltration and Lining of Knitted Dacron Arterial Grafts. Surgical Forum 1981; 132:336-38.
Onuki Y et al. Accelerated Enothelialization Model For The Study Of Dacron Graft Healing. Annals of Vasc Surgery 1997; 11:141-48.
Graham L M et al. Enhanced Endothelialization of Dacron Grafts By External Vein Wrapping. Journal of Surgical Research 1995; 38:537-45.
Bull D A et al. Cellular Origin and Ratoe of Endothelial Cell Coverage of PTFE Grafts. Journal of Surgical Research 1995; 58:58-65.
Sterpetti A V. Healing of High-Porosity Polytetrafluoroethylene Arterial Grafts Is Influenced By The Nature Of The Surrounding Tissue. Surgery 1992; 111:667-82.
Lepidi S. The Degree of Porosity Influences The Release of Growth Factors By Healing Polytetrafluoroethylene(PTFE) Grafts. European Journal of Vascular Surgery 1996; 11:36-41.
Sedlairk K M et al. Rapid Endothelialization of Microporous Vascular Prostheses Covered With Meshed Vascular Tissue: A Preliminary Report. Biomaterials 1990; 11:4-7.
Holubee H et al. The Relationship Between PTFE Graft Ultrastructure and Cellular Ingrowth: The Influence Of An Autologous Jugular Vein Wrap. Biomaterials Mechanical Properties 1994; 53-64.
Ahn S S et al. Endovascular Femoropopliteal Bypass: Early Human Cadaver and Animal Studies. Ann Surg 1995; 9:28-36.
Dolmatch B L et al. Patency and Tissue Response Related to Two Types of Polytetrafluoroethylene-Covered Stents in the Dog. Journal of Vascular and Interventional Radiology. 1996; 641-49.
Morris G E et al. Endovascular Femoropopliteal Bypass: A Cadaveric Study. Eur J Vasc Endovasc Surg 1995; 10:9-15.
Martin M L et al. Human transluminally placed endovascular stentedgrafts: Preliminary histopathologic analysis of healing grafts in aortoiliac and femoral artery occlusive disease. J Vasc Surg 1995; 21:595-604.
Parodi J C. Endovascular Repair of Abdominal Aortic Aneurysms and Other Arterial Lesions. J Vasc Surg 1995; 21:549-57.
Dake M D et al. Transluminal Placement of Endovascular Stent-Grafts For The Treatment of Descending Thoracic Aortia Aneuryms. New England Journal of Medicine 1994; 331:1729-34.
Campbell Carey V.
Chastain James H.
Kovach Larry J.
Laguna Alvaro J.
Pond Daniel B.
House Wayne D
Prebilic Paul B.
W. L. Gore & Associates, Inc.
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