US 12,453,568 B2
Methods and apparatus for restoring flow
Kunakorn Atchaneeyasakul, Pittsburgh, PA (US); Ashutosh P. Jadhav, Paradise Valley, AZ (US); and Shashvat M. Desai, Phoenix, AZ (US)
Assigned to Gravity Medical Technology, Inc., Lake Forest, CA (US)
Filed by Gravity Medical Technology, Inc., Carlsbad, CA (US)
Filed on Feb. 10, 2022, as Appl. No. 17/668,755.
Application 17/668,755 is a continuation of application No. 17/336,791, filed on Jun. 2, 2021, granted, now 11,291,463.
Claims priority of provisional application 63/035,213, filed on Jun. 5, 2020.
Prior Publication US 2022/0175402 A1, Jun. 9, 2022
Int. Cl. A61B 17/221 (2006.01); A61B 90/00 (2016.01); A61B 17/00 (2006.01); A61B 17/22 (2006.01)
CPC A61B 17/221 (2013.01) [A61B 90/39 (2016.02); A61B 2017/00336 (2013.01); A61B 2017/22038 (2013.01); A61B 2090/376 (2016.02); A61B 2090/3966 (2016.02)] 14 Claims
OG exemplary drawing
 
1. A device for removing an obstruction from a blood vessel, the device comprising:
an elongate shaft having a proximal end, a distal end, and a lumen extending therebetween;
an expandable capture cage having an expanded configuration, a collapsed configuration, a proximal end, a distal end and an intermediate region disposed between the proximal and distal ends of the expandable capture cage,
wherein the proximal end of the expandable capture cage is coupled to the distal end of the elongate shaft,
wherein the expandable capture cage in the collapsed configuration is adapted to be delivered through the blood vessel to the obstruction,
wherein the expandable capture cage in the expanded configuration is adapted to expand into and enmesh the obstruction so that the obstruction may be removed from the blood vessel by retraction of the expandable capture cage,
wherein the proximal end of the expandable capture cage comprises a first proximal region and second proximal region, the first proximal region having a plurality of closed cells having a first geometry, and the second proximal region having a plurality of closed cells having a second geometry different than the first geometry,
wherein the distal end of the expandable capture cage comprises a plurality of closed cells having a third geometry different than the first geometry and the second geometry,
wherein the distal end of the expandable capture cage further comprises a tapered porous tip coupled to the plurality of closed cells having the third geometry and distal thereof, and
wherein the intermediate region of the expandable capture cage comprises a plurality of closed cells having a fourth geometry different than the first geometry, the second geometry and the third geometry,
wherein the first geometry comprises a plurality of diamond shaped closed cells formed from a plurality of linear struts coupled together,
wherein the second geometry comprises a plurality of lemon shaped closed cells formed from a plurality of linear struts, a sigmoidally shaped strut and an inverse sigmoidally shaped strut coupled together, the lemon shaped closed cells distal of the diamond shaped closed cells,
wherein the third geometry comprises a plurality of lemon shaped closed cells formed from a plurality of sigmoidally shaped struts and a plurality of inverse sigmoidally shaped struts coupled together,
wherein the fourth geometry comprises a plurality of peanut shaped closed cells formed from a plurality of sigmoidally shaped struts and a plurality of inverse sigmoidally shaped struts coupled together, and
wherein the first, second, third, and fourth geometries of the expandable capture cage are shaped and positioned so as to accommodate a location and size of the obstruction, and so that the expandable capture cage is configured to allow blood flow therethrough thereby avoiding causing ischemia while facilitating capture and integration of the obstruction, and without allowing embolism thereof.