Patent ID: 11903811
Assignee: C. R. BARD, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A vascular implant and removal apparatus for removing a vascular implant from a vessel wall comprising:
a) a vascular implant having an outer portion that is adapted to be secured to a blood vessel wall, said implant having a central, longitudinal axis;
b) a catheter having a diameter and a catheter lumen defining a catheter longitudinal axis;
c) an elongated extraction device configured to be positioned within the catheter lumen and to move longitudinally and rotationally with respect to the catheter, said extraction device having a tubular member and a rod with a distal end;
d) the extraction device including at least one helical extraction wire coupled to the distal end of the rod, the at least one helical extraction wire configured as a generally conically shaped helix having a narrow end and a wider end with a first diameter, at least one helical extraction wire coupled to the distal end of the rod at the narrow end;
e) wherein in an initial vascular implant removal position the wider end of the helical extraction wire engages the vascular implant outer portion, wherein in a final vascular implant removal position the helical extraction wire collapses the outer portion to a second diameter that is smaller than the said first diameter, wherein movement of the vascular implant from the initial removal position to the final removal position is effected by rotation of the extraction device rod and helical extraction wire connected to the vascular implant outer portion;
f) wherein in the initial removal position, the helical extraction wire first diameter is greater than the diameter of the catheter and less than the diameter of the vessel; and
g) wherein said final removal position disengages the vascular implant outer portion from the vessel wall by collapsing the outer portion toward said central longitudinal axis.