	US 12,232,947 B2
	IVC filter retrieval device
Munier Nazzal, Toledo, OH (US); Abdullah Nasif, Toledo, OH (US); Mohamed Fikri Mohamed Osman, Toledo, OH (US); Ayman Ahmed, Toledo, OH (US); Sakeena Davis, Toledo, OH (US); Soheila Alidad, Toledo, OH (US); Zahra Alzaher, Toledo, OH (US); and Ghayth M. Ansarei, Toledo, OH (US)
Assigned to The University of Toledo, Toledo, OH (US)
Filed by The University of Toledo, Toledo, OH (US)
Filed on Sep. 14, 2022, as Appl. No. 17/944,622.
Claims priority of provisional application 63/244,453, filed on Sep. 15, 2021.
Prior Publication US 2024/0081969 A1, Mar. 14, 2024
Int. Cl. A61F 2/01 (2006.01)

CPC A61F 2/011 (2020.05) [A61F 2/0105 (2020.05)]

13 Claims

1. An IVC filter retrieval device comprising:

a sheath defining a lumen and extending from a sheath proximal end to a sheath distal end;

a grabbing member movable within the lumen, wherein the grabbing member extends from a distal grabbing member end to a proximal grabbing member end, and includes a distal grabbing member portion; and

a closing member movable within the lumen, wherein the closing member extends from a distal closing member end to a proximal closing member end;

wherein the grabbing member is configured to move between an extended grabbing position in which the distal grabbing member end protrudes from the sheath at the sheath distal end, and a retracted grabbing position in which the distal grabbing member end is disposed within the sheath;

wherein the closing member is configured to move between an extended closing position in which the distal closing member end protrudes from the sheath at the sheath distal end, and a retracted closing position in which the closing member is disposed within the sheath;

wherein the grabbing member and the closing member are movable to create a closed loop wherein the distal grabbing member end is in direct contact with the distal closing member end;

wherein the grabbing member and the closing member are movable to create an open loop wherein the distal grabbing member end is disposed a distance away from the distal closing member end, the distance defining a gap;

wherein a distal closing member portion comprises a curved protrusion causing the distal closing member end to protrude outward a distance from an axis defined by the proximal closing member end; and

wherein a loop formed between the grabbing member and the closing member has a loop radius larger than a radius of the sheath.