US 11,986,195 B2
Device and a thrombectomy apparatus for extraction of thrombus from a blood vessel
Ignacio Cortiñas Villazón, Barcelona (ES); Ane Lizarazu González, Barcelona (ES); Ofir Arad Hadar, Sant Cugat del Vallès (ES); and Iñaki Galve Murillo, Barcelona (ES)
Assigned to Anaconda Biomed, S.L., Sant Quirze del Vallès (ES)
Appl. No. 17/274,973
Filed by ANACONDA BIOMED, SL, Sant Quirze del Vallès (ES)
PCT Filed Oct. 16, 2019, PCT No. PCT/EP2019/078088
§ 371(c)(1), (2) Date Mar. 10, 2021,
PCT Pub. No. WO2020/079082, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 18382736 (EP), filed on Oct. 16, 2018.
Prior Publication US 2021/0393280 A1, Dec. 23, 2021
Int. Cl. A61B 17/221 (2006.01); A61L 31/02 (2006.01); A61L 31/10 (2006.01); A61B 17/22 (2006.01)
CPC A61B 17/221 (2013.01) [A61L 31/022 (2013.01); A61L 31/10 (2013.01); A61B 2017/22079 (2013.01); A61B 2017/2212 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A device for extraction of thrombus from a blood vessel, said device comprising a segment defining a distal end and a proximal end and being configured to change its shape from a retracted position in a compressed state to an extended and expanded position, to be appositioned against an inner wall of the blood vessel, to receive and retain the thrombus, wherein the segment is formed by a mesh of at least two sets of helicoidal filaments turning respectively in opposite directions and being intertwined, and wherein the at least two sets of helicoidal filaments of the mesh extend continuously through two distinct tubular sections, a first section and a second section, the second section being comprised of two sub-sections, a first sub-section having a shape with a progressive reduction of diameter configured to open and create a space for the thrombus, and a second sub-section of a tubular uniform diameter configured to provide a connection to a catheter or to a hypotube;
wherein the at least two sets of helicoidal filaments form closed loops at a distal end of the first section;
wherein said mesh of the at least two sets of helicoidal filaments in the first section extends distally with a constant braiding angle from a proximal end of the first section to and around the closed loops back to the proximal end of the first section and is configured to provide outward radial forces higher than in the second section, such that the first section becomes appositioned against the inner wall of the blood vessel in an open position;
wherein:
the closed loops are configured to act as a spring, such that the outward radial forces in first and second end portions of the first section are higher than in an intermediate portion thereof; and
said mesh of the first sub-section of the second section has a conical shape and comprises a braiding angle that changes at its proximal and distal ends to provide outward radial strength to maintain the conical shape and to maintain the open position of the first section.