US 11,903,811 B2
Embolus blood clot filter removal system and method
Dmitry Mikhailovich Volobuev, St. Petersburg (RU); Alexander Germanovich Kashkarov, St. Petersburg (RU); and Andrzej J. Chanduszko, Chandler, AZ (US)
Assigned to C.R. BARD, INC., Murray Hill, NJ (US)
Filed by C.R. BARD, INC., Murray Hill, NJ (US)
Filed on May 19, 2021, as Appl. No. 17/324,656.
Application 17/324,656 is a continuation of application No. 15/660,646, filed on Jul. 26, 2017, granted, now 11,039,913.
Application 15/660,646 is a continuation of application No. 12/096,367, granted, now 9,730,781, issued on Aug. 15, 2017, previously published as PCT/US2006/062733, filed on Dec. 29, 2006.
Claims priority of provisional application 60/754,598, filed on Dec. 30, 2005.
Prior Publication US 2021/0338407 A1, Nov. 4, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/01 (2006.01); A61B 17/221 (2006.01)
CPC A61F 2/011 (2020.05) [A61B 17/221 (2013.01); A61F 2/01 (2013.01); A61F 2/0105 (2020.05); A61B 2017/2215 (2013.01); A61F 2002/016 (2013.01); A61F 2230/005 (2013.01); A61F 2230/008 (2013.01); A61F 2230/0067 (2013.01); A61F 2250/0059 (2013.01)] 15 Claims
OG exemplary drawing
 
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.