Methods and devices for treatment of vascular defects

Abstract

Devices for treatment of a patient's vasculature are described. The device includes a first hub, a second hub, a support structure including a plurality of struts disposed between the first hub and the second hub, and a layer of material disposed over the plurality of struts. The support structure has a low profile, radially constrained state with an elongated tubular configuration suitable for delivery from a microcatheter. The support structure also has an expanded state, a smooth outer surface, and has an axially shortened configuration relative to the radially constrained state. The layer of material may be made from acrylic, silk, silicone, polyvinyl alcohol, polypropylene, polyester, PolyEtherEther Ketone (PEEK), polytetrafluoroethylene (PTFE), polycarbonate urethane (PCU), or polyurethane (PU). The support structure may be formed from a slotted tubular member.

What is claimed is: 
     
         1 . A device for treatment of a patient's vasculature comprising:
 a first hub;   a second hub;   a support structure having a longitudinal axis and disposed between the first hub and the second hub, the support structure including a plurality of struts; and   a layer of material disposed over the plurality of struts,   wherein the support structure has a low profile, radially constrained state with an elongated tubular configuration having a transverse dimension, the radially constrained state having a low profile suitable for delivery from a microcatheter, and   wherein the support structure also has an expanded state having a first end, a second end, and a smooth outer surface and having an axially shortened configuration relative to the radially constrained state.   
     
     
         2 . The device of  claim 1 , wherein the layer of material comprises at least one of acrylic, silk, silicone, polyvinyl alcohol, polypropylene, polyester, PolyEtherEther Ketone (PEEK), polytetrafluoroethylene (PTFE), polycarbonate urethane (PCU) and polyurethane (PU). 
     
     
         3 . The device of  claim 1 , wherein the layer of material comprises polytetrafluoroethylene (PTFE). 
     
     
         4 . The device of  claim 1 , wherein the support structure is formed from a slotted tubular member. 
     
     
         5 . The device of  claim 1 , wherein the support structure comprises between about 4 struts and about 20 struts. 
     
     
         6 . The device of  claim 1 , wherein the support structure comprises between about 6 struts and about 12 struts. 
     
     
         7 . The device of  claim 1 , wherein the support structure comprises 8 struts. 
     
     
         8 . The device of  claim 1 , wherein 8 struts extend from at least one of the first hub and the second hub. 
     
     
         9 . The device of  claim 1 , wherein the plurality of struts of the support structure in its radially constrained state comprises a circumferential array of struts numbered between about 4 and about 20. 
     
     
         10 . The device of  claim 1 , wherein the plurality of struts of the support structure in its radially constrained state comprises a circumferential array of struts numbered between about 6 and about 12. 
     
     
         11 . The device of  claim 1 , wherein the plurality of struts of the support structure in its radially constrained state comprises a circumferential array of 8 struts. 
     
     
         12 . The device of  claim 1 , wherein at least one of the first or second ends is inverted. 
     
     
         13 . The device of  claim 1 , wherein the plurality of struts includes struts having a transverse cross section including a major transverse dimension disposed circumferentially with respect to the longitudinal axis of the support structure and a minor transverse dimension disposed radially with respect to the longitudinal axis of the support structure. 
     
     
         14 . The device of  claim 1 , wherein the support structure has a three dimensional contour, and wherein the layer of material has a three dimensional configuration that substantially matches at least a portion of the three dimensional contour of the support structure. 
     
     
         15 . The device of  claim 1 , wherein the layer of material is secured to the support structure at least in part by an adhesive. 
     
     
         16 . The device of  claim 1 , wherein the layer of material covers at least a portion of the first or second ends of the support structure. 
     
     
         17 . The device of  claim 1 , wherein the layer of material includes pores. 
     
     
         18 . The device of  claim 1 , wherein the expanded state of the support structure is a heat-formed three-dimensional shape. 
     
     
         19 . The device of  claim 1 , wherein the layer of material is stretched between adjacent struts of the plurality of struts when the support structure is in the expanded state. 
     
     
         20 . The device of  claim 1 , wherein each strut of the plurality of struts extends from the first hub to the second hub.