Endovascular graft

Abstract

An endovascular graft which is configured to conform to the morphology of the vessel to be treated and which is made from an inflatable structure having a proximal end with a proximal inflatable cuff and a distal end with a distal inflatable cuff. At least one elongated inflatable channel is disposed between and in fluid communication with fluid tight chambers of the inflatable cuffs which may contain rupture discs therebetween which can be configured to rupture at different pressures. A thin flexible barrier disposed between the inflatable cuffs and the elongated inflatable channel of the frame so as to form a tubular structure defining a longitudinal channel to confine a flow of blood or other fluid therethrough. The graft may also have an expansion member attached to the proximal end of the graft which is preferably made of linked expandable rings of pseudoelastic shape memory alloy which is self expanding and prevents axial displacement of the graft once it is deployed.

What is claimed is:  
     
         1 . An endovascular graft for placement in a patient's body channel, comprising: 
 a) a flexible tubular structure having a proximal end portion which comprises an inflatable cuff; and    b) an expansion member coupled to the flexible tubular structure, disposed proximal of the inflatable cuff and configured to expand in an outward radial direction to mechanically anchor to the patient's body channel.    
     
     
         2 . The endovascular graft of  claim 1  wherein the flexible tubular structure comprises a porous polymer.  
     
     
         3 . The endovascular graft of  claim 2  wherein the porous polymer comprises ePTFE.  
     
     
         4 . The endovascular graft of  claim 1  wherein the expansion member comprises a stent.  
     
     
         5 . The endovascular graft of  claim 4  wherein the stent comprises a shape memory alloy.  
     
     
         6 . The endovascular graft of  claim 1  wherein the expansion member further comprises barbs extending at least partially in an outward radial direction and configured to penetrate tissue of the patient's body channel.