Apparatus for capturing objects beyond an operative site utilizing a capture device delivered on a medical guide wire

Abstract

An apparatus for removing a solid object from a body canal or vessel includes a coil of wire configured to slidably receive a guide wire and a sack having a mouth and a closed bottom opposite the sack. A resilient frame is connected between the coil of wire and the sack for biasing the mouth of the sack open around the coil of wire. The resilient frame is positionable between a collapsed state where the mouth of the sack is closed against the bias of the resilient frame and a deployed state where the mouth of the sack is biased open by the resilient frame.

1 . A method for deploying an apparatus for removing a solid object from a patient's vasculature, the apparatus including a guide wire, a resilient frame including a sack having a mouth and a closed bottom opposite the mouth, the resilient frame being positionable between a collapsed state where the mouth of the sack is closed against the bias of the resilient frame and a deployed state where the mouth of the sack is biased open by the resilient frame, a flexible mounting member configured to slidably receive the guide wire, the resilient frame being attached to the flexible mounting member; a containment collar configured to slidably receive the guide wire there through and to receive at least part of the resilient frame therein; and a pull wire connected to the containment collar, wherein the pull wire has a proximal end which remains outside the body vessel during usage, the method including:
 deploying the guide wire within the patient's vasculature;   sliding the flexible mounting member, resilient frame and containment collar over the guide wire to position the resilient frame into a target area in the patient's vasculature; and   moving the pull wire proximally relative to the resilient frame to retract the containment collar from the resilient frame.   
     
     
         2 . The method of  claim 1 , wherein the flexible mounting member is a coil of wire. 
     
     
         3 . The method of  claim 1 , wherein the guide wire includes a distal stop. 
     
     
         4 . The method of  claim 3 , wherein the step of sliding the mounting member, resilient frame and containment collar over the guide wire to position the resilient frame into a target area in the body vessel includes abutting a distal end of the mounting member against the distal stop of the guide wire. 
     
     
         5 . The method of  claim 1 , wherein the resilient frame is adapted to exert a force against the wall of the body vessel once deployed. 
     
     
         6 . The method of  claim 1 , wherein a portion of the pull wire has at least one coiled section which wraps around the guide wire. 
     
     
         7 . An apparatus for removing a solid object from a body canal or vessel, the apparatus comprising:
 a guide wire;   a sack having an apex;   control arms attached to said sack and configured to bias said sack into an open position;   wherein the improvement comprises a flexible frame in the form of a cylinder defining a lumen therethrough, said control arms and sack coupled to said flexible frame and configured to move with said flexible frame along said guide wire, said flexible cylinder frame being capable of rotation or linear movement when positioned on said guide wire, said flexible cylinder frame further configured to be firm axially, but pliable laterally, such that said flexible cylinder frame can conform to twists and bends taken by said guide wire during manipulation and advancement of whereby said flexible cylinder frame can bend and follow a path of said guide wire while avoiding axial elongation of said flexible cylinder frame.   
     
     
         8 . The apparatus of  claim 7 , wherein said guide wire includes a proximal stop and a distal stop in spaced relation on said guide wire; said flexible frame is received on said guide wire between said proximal stop and said distal stop; and each said stop is configured to avoid the slidable passage of said flexible frame thereby. 
     
     
         9 . The apparatus of  claim 7 , further comprising a containment collar configured to slidably receive the guide wire therethrough and to receive at least part of the flexible frame therein. 
     
     
         10 . The apparatus of  claim 7 , further comprising a pull wire connected to said containment collar. 
     
     
         11 . An apparatus for removing a solid object from a body canal or vessel, the apparatus comprising:
 A guide wire;   a flexible frame member configured to slidably receive the guide wire;   a sack having a mouth and a closed bottom opposite the mouth;   a resilient frame connected between the flexible frame member and the sack for biasing the mouth of the sack open, the resilient frame positionable between a collapsed state where the mouth of the sack is closed against the bias of the resilient frame and a deployed state where the mouth of the sack is biased open by the resilient frame;   a containment collar configured to slidably receive the guide wire therethrough and to receive at least part of the resilient frame therein; and   a pull wire connected to the containment collar, wherein in response to relative movement between the flexible frame member and the pull wire, the resilient frame is positionable between the collapsed state at least partially inside the containment collar and the deployed state outside the containment collar.   
     
     
         12 . The apparatus as set forth in  claim 11 , wherein the flexible frame member is firm axially and pliable laterally. 
     
     
         13 . The apparatus as set forth in  claim 11 , wherein: the closed bottom of the sack is connected to the flexible frame member adjacent one end thereof; the resilient frame is connected to the flexible frame member adjacent the end thereof opposite the closed bottom of the sack. 
     
     
         14 . The apparatus as set forth in  claim 11 , further including a deployment catheter having a lumen configured to slidably receive the guide wire, wherein: the deployment catheter has an end configured to abut an end of the flexible frame member when the flexible frame member is received on the guide wire. 
     
     
         15 . The apparatus as set forth in  claim 11 , wherein the flexible frame member is a helically wound spring. 
     
     
         16 . The apparatus as set forth in  claim 11 , wherein the resilient frame has a radiopaque thread wrapped around at least a portion of the resilient frame to increase the radiopacity of the resilient frame. 
     
     
         17 . The apparatus as set forth in  claim 11 , wherein a portion of the pull wire has at least one coiled section which wraps around the guide wire. 
     
     
         18 . The apparatus as set forth in  claim 11 , wherein a portion of the pull wire has a plurality of spaced coiled sections which wrap around the guide wire. 
     
     
         19 . The apparatus as set forth in  claim 11 , wherein the containment collar and pull wire are connected together by a tubular member. 
     
     
         20 . The apparatus as set forth in  claim 19 , wherein the tubular member connecting the containment collar and pull wire is formed as a coil of wire.