Method and system for delivering an implant utilizing a lumen reducing member

Abstract

Method and system for inserting an implant, such as vaso-occlusive device, an embolic containment device, or a stent into a vascular space to a vascular site in a body utilizing a lumen-reducing catheter. The method and system can be used to treat aneurysm, tumors and other vascular malformations. A guide is inserted into the vascular space. First and second catheters are inserted into the vascular space along the guide. The first or delivery catheter defines a first cavity, and the second or lumen-reducing catheter defines a second, smaller cavity. The second catheter is inserted within the first catheter. In one embodiment, an implant is advanced together with the first and second catheters to a vascular site. In an alternative embodiment, after the first and second catheters are positioned, the guide and the second catheter are removed from the first cavity, and an implant is inserted through the first cavity. With these configurations, radial movement of the guide is restricted to the smaller, second cavity rather than the larger, first cavity.

1 . A method of delivering an implant through a vascular space to a vascular site in a body, the method comprising: 
 providing a guide, a displacement member, a first catheter having a body, a distal end and a proximal end and defining a first cavity, and a second catheter having a body, a distal end and a proximal end and defining a second cavity, the second catheter being insertable within the first cavity;    advancing the distal ends of the first and second catheters together along the guide and through the vascular space to the vascular site;    removing the second catheter and the guide from the first cavity;    inserting the implant into the first cavity of the first catheter; and    advancing the implant through the first cavity to the vascular site using the displacement member.    
     
     
         2 . The method of  claim 1 , the second catheter reducing radial movement of the first catheter relative to the guide.  
     
     
         3 . The method of  claim 1 , the guide being confined to the second cavity when the first and second catheters are inserted through the vascular space.  
     
     
         4 . The method of  claim 1 , advancing the distal ends of the first and second members comprising advancing generally aligned distal ends of the first and second members along the guide and through the vascular space to the vascular site.  
     
     
         5 . The method of  claim 1 , wherein the first member is a catheter, and the second member is a catheter.  
     
     
         6 . The method of  claim 1 , wherein the implant is a vaso-occlusive implant.  
     
     
         7 . The method of  claim 1 , wherein the displacement member is a pusher wire.  
     
     
         8 . A method of delivering a first implant and a second implant through a vascular space to a vascular site in a body, the method comprising: 
 providing a guide, a first catheter having a body, a distal end and a proximal end and defining a first cavity, and a second catheter having a body, a distal end and a proximal end and defining a second cavity, the second catheter being insertable within the first cavity;    providing a first implant and a second implant, each implant being configured for advancement through the vascular space;    advancing the distal ends of the first and second catheters together along the guide and through the vascular space to the vascular site;    delivering the first and second implants to the vascular site, the first implant comprising a containment implant that reduces a width of a neck of the vascular site; and    retaining the second implant in the vascular site using the first implant.    
     
     
         9 . The method of  claim 8 , the second catheter reducing radial movement of the first catheter relative to the guide.  
     
     
         10 . The method of  claim 8 , the guide being confined to the second cavity when the first and second catheters are inserted through the vascular space.  
     
     
         11 . The method of  claim 8 , advancing the distal ends of the first and second members comprising advancing generally aligned distal ends of the first and second members along the guide and through the vascular space to the vascular site.  
     
     
         12 . The method of  claim 8 , wherein the first member is a catheter, and the second member is a catheter.  
     
     
         13 . The method of  claim 8 , wherein the second implant is a vaso-occlusive implant and the vascular site is an aneurysm, the containment implant reduces a width of a neck of an aneurysm, and the vaso-occlusive implant is delivered to the aneurysm and secured or retained within the aneurysm by the previously deployed containment implant.  
     
     
         14 . A system for delivering an implant through a vascular space to a vascular site in a body, comprising: 
 a guide;    a displacement member;    a first catheter having a body, a distal end and a proximal end and defining a first cavity; and    a second catheter having a body, a distal end and a proximal end and defining a second cavity, the second catheter being insertable within the first cavity,    the guide being configured for insertion through the vascular space to the vascular site, the distal ends of the first and second catheters being configured for advancement together along the guide and through the vascular space to the vascular site, and the displacement member being configured for advancement of the implant through the first cavity and to the vascular site after the guide and the second catheter are removed.    
     
     
         15 . The system of  claim 14 , the second catheter reducing radial movement of the first catheter relative to the guide.  
     
     
         16 . The system of  claim 14 , the guide being confined to the second cavity when the first and second catheters are inserted through the vascular space.  
     
     
         17 . The system of  claim 14 , wherein the distal ends of the first and second members are generally aligned.  
     
     
         18 . The system of  claim 14 , wherein the first member is a catheter, and the second member is a catheter.  
     
     
         19 . The system of  claim 14 , wherein the implant is a vaso-occlusive implant.  
     
     
         20 . The system of  claim 14 , wherein the displacement member is a pusher wire.  
     
     
         21 . A system for delivering a first implant and a second implant through a vascular space to a vascular site in a body, comprising: 
 a guide;    a first catheter having a body, a distal end and a proximal end and defining a first cavity;    a second catheter having a body, a distal end and a proximal end and defining a second cavity, the second catheter being insertable within the first cavity;    a first implant, the first implant comprising a containment implant; and    a second implant,    the distal ends of the first and second catheters being configured for advancement together along the guide and through the vascular space to the vascular site, the first and second implants being configured for advancement to the vascular site using the first and second catheters, and the first implant being positionable to reduce a width of a neck of the vascular site and to retain the second implant in the vascular site.    
     
     
         22 . The system of  claim 21 , the second catheter configured for reducing radial movement of the first catheter relative to the guide.  
     
     
         23 . The system of  claim 21 , wherein the first member is a catheter, and the second member is a catheter.  
     
     
         24 . The system of  claim 21 , wherein the distal ends of the first and second members are generally aligned.  
     
     
         25 . The system of  claim 21 , wherein the second implant is a vaso-occlusive implant and the vascular site is an aneurysm, the containment implant reduces a width of a neck of an aneurysm, and the vaso-occlusive implant is delivered to the aneurysm and secured or retained within the aneurysm by the previously deployed containment implant.