US 12,433,600 B2
Embolization catheter for reflux free delivery of microspheres
Tom Dagan, Omer (IL); Nir Holtzman, Rishon Lezion (IL); Yuval Zipory, Modiin (IL); Osnat Harbater, Raanana (IL); and Eran Miller, Moshav Beit Elazari (IL)
Assigned to Argon Medical Devices, Inc., Plano, TX (US)
Appl. No. 17/609,899
Filed by Argon Medical Devices, Inc., Plano, TX (US)
PCT Filed May 27, 2020, PCT No. PCT/IL2020/050594
§ 371(c)(1), (2) Date Nov. 9, 2021,
PCT Pub. No. WO2020/234889, PCT Pub. Date Nov. 26, 2020.
Claims priority of provisional application 62/852,009, filed on May 23, 2019.
Prior Publication US 2022/0218358 A1, Jul. 14, 2022
Int. Cl. A61B 17/12 (2006.01); A61M 25/00 (2006.01)
CPC A61B 17/12186 (2013.01) [A61M 25/0052 (2013.01); A61B 2017/1205 (2013.01); A61M 2025/0042 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An embolization microcatheter for a delivery of embolization beads to a target area, the embolization microcatheter comprising:
a proximal end and a distal end, the distal end comprising an end opening; and
a skeleton formed of braided or coiled wires;
a polymeric layer intercalated into and/or overlaying the skeleton; and
a filter located in proximity to the end opening of the distal end; the filter comprising at least 100 openings distributed circumferentially around a wall thereof in at least 5 discrete annular rings; wherein each annular ring comprises at least 30 openings and a total open area of the filter is at least 3 times larger than an area of the end opening of the distal end.