US 12,274,458 B2
Systems and methods for removal of blood and thrombotic material
Bradley S. Culbert, Mission Viejo, CA (US); Thanh Van Nguyen, Westminster, CA (US); and Caroline Kim, Signal Hill, CA (US)
Assigned to Walk Vascular, LLC, Irvine, CA (US)
Filed by WALK VASCULAR, LLC, Irvine, CA (US)
Filed on Feb. 14, 2022, as Appl. No. 17/671,462.
Claims priority of provisional application 63/149,623, filed on Feb. 15, 2021.
Prior Publication US 2022/0257268 A1, Aug. 18, 2022
Int. Cl. A61B 17/22 (2006.01); A61M 1/00 (2006.01)
CPC A61B 17/22 (2013.01) [A61M 1/734 (2021.05); A61M 1/743 (2021.05); A61M 1/85 (2021.05); A61B 2017/22079 (2013.01); A61M 2210/12 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A system for aspirating thrombus, comprising:
an aspiration catheter comprising:
an elongate shaft configured for placement within a blood vessel of a subject;
a supply lumen and an aspiration lumen each extending along the elongate shaft, the supply lumen having a proximal end and a distal end, and the aspiration lumen having a proximal end and a distal opening; and
an opening at or near the distal end of the supply lumen, the opening configured to allow injection of pressurized fluid into the aspiration lumen at or near the distal end of the aspiration lumen when the pressurized fluid is pumped through the supply lumen;
an extension conduit comprising a distal end configured to couple to the aspiration lumen of the aspiration catheter, a proximal end configured to couple to a negative pressure source, and a passageway extending between the distal end and the proximal end of the extension conduit;
a combined hydraulic and electrical control carried on the extension conduit and comprising a first control interface and a control body, the first control interface configured to be activated by a user to move the control body between a first position and a second position, the control body being configured to be locked in second position;
an electrical switch configured to be activated by the control body when the control body is moved to the second position; and
a valve having a closed position blocking flow through the passageway of the extension conduit and an open position allowing flow through the passageway of the extension conduit, the valve configured to be moved from the closed position to the open position by the control body when the control body is moved to the second position.