Snare

Abstract

An intravascular snare device for use in capturing debris found in blood vessels. The snare device is fabricated from a tube and includes longitudinally and circumferentially extending members. The snare device specifically embodies structure that provides enhanced radial opening and angular resistance to collapse.

1 - 53 . (canceled)  
   
   
       54 . A medical device, comprising: 
 an elongate member, the elongate member having a proximal end portion having a first cross-sectional profile characterized by a first height and a distal end portion having a second cross-sectional profile characterized by a second height, the first height greater than the second height; and    a second device attached to the distal end portion of the elongate member, the second device sized and shaped to collect substances from vasculature.    
   
   
       55 . The device of  claim 54 , further comprising a coil surrounding both the elongate member and a portion of the snare device.  
   
   
       56 . The device of  claim 54 , further comprising a first coil and a second coil, the first coil positioned about the elongate member proximal of the second coil.  
   
   
       57 . The device of  claim 56 , wherein the first coil and second coil are made from different materials.  
   
   
       58 . The device of  claim 57 , wherein the second coil is formed from radiopaque material.  
   
   
       59 . The device of  claim 58 , wherein the second coil is formed from about 90% platinum and about 10% iridium alloy.  
   
   
       60 . The device of  claim 54 , wherein the elongate member is tapered.  
   
   
       61 . The device of  claim 54 , wherein the distal end portion of the elongate member is tapered.  
   
   
       62 . The device of  claim 54 , wherein the distal end portion of the elongate member includes a transition point at which the elongate member gradually tapers.  
   
   
       63 . The device of claim  51 , wherein the distal end portion of the elongate member includes a transition point at which the elongate member tapers in a step-tapered manner.  
   
   
       64 . The device of  claim 54 , wherein the proximal end portion and the distal end portion of the elongate member are formed from different materials.  
   
   
       65 . The device of  claim 64 , wherein the proximal end portion is formed from stainless steel.  
   
   
       66 . The device of  claim 64 , wherein the distal end portion is formed from nitinol.  
   
   
       67 . The device of  claim 54 , wherein the snare device includes a body cut from a tube.