IP Library › Granted Patent US 12,369,940
Granted Patent B2
US 12,369,940 · App. 17/887,879 · Granted Jul 29, 2025

Thrombectomy apparatus and method

Inventors: Mark L. Jenson (Greenfield, MN); William J. Drasler (Minnetonka, MN); Joseph M. Thielen (Buffalo, MN)
Assignee: Walk Vascular, LLC
A61B17/32037A61B17/221A61M1/84A61M25/01A61M25/09A61B2017/2212A61M2025/0183
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Quick Facts
Patent No.
US 12,369,940
App. No.
17/887,879
Granted
Jul 29, 2025
Kind
B2
Abstract

A thrombectomy system may include an elongate shaft that defines a high pressure lumen and a low pressure lumen. The high pressure lumen may terminate near an end of the low pressure lumen. An expandable capture basket may be disposed near the end of the low pressure lumen. A thrombectomy apparatus may include an elongate shaft, an evacuation lumen extending within the elongate shaft and a high pressure lumen extending within the elongate shaft. A capture apparatus may be disposed within a wire lumen that extends within the elongate shaft such that the capture apparatus extends distally from the wire lumen.

Claims (27)

1. A thrombectomy apparatus configured to connect to a high pressure source and a suction source, the thrombectomy apparatus comprising:

an elongate shaft comprising a distal region defining a distal end;

a frame structure disposed near a distally-facing opening in the distal region;

a low pressure lumen extending within the elongate shaft to the distally-facing opening at the distal end, the low pressure lumen being in fluid connection with a vacuum source; and

a high pressure lumen in fluid communication with the low pressure lumen toward the distal region of the elongate shaft, the high pressure lumen being in fluid communication with the high pressure source and terminating toward the distal region in a first jet orifice, the first jet orifice comprising a lateral-facing opening being formed in a surface forming the low pressure lumen and being configured to form a jet of fluid exiting the lateral-facing opening in a proximal direction within the low pressure lumen so that at least a first jet of fluid from the first jet orifice contacts a sidewall of the low pressure lumen and causes turbulence within the low pressure lumen to break up thrombi passing into the low pressure lumen, a second jet orifice being disposed within a hollow portion of the frame structure disposed distal the distal end of the low pressure lumen and in fluid communication with the high pressure lumen, the frame structure supporting a membrane that is at least substantially impermeable to blood flow, a second jet of fluid exiting from the second jet orifice.

2. The thrombectomy apparatus of claim 1 , wherein the high pressure lumen extends alongside the low pressure lumen.

3. The thrombectomy apparatus of claim 1 , wherein the high pressure lumen extends to a position proximate the distal end of the elongate shaft.

4. The thrombectomy apparatus of claim 1 , further comprising a guidewire lumen that extends alongside one of the high pressure lumen and the low pressure lumen.

5. The thrombectomy apparatus of claim 1 , wherein the first jet of fluid traverses the low pressure lumen.

6. The thrombectomy apparatus of claim 1 , wherein the fluid for the first jet and the second jet is selected from saline or a therapeutically acceptable fluid.

7. The thrombectomy apparatus of claim 1 , further comprising an external sheath.

8. The thrombectomy apparatus of claim 1 , wherein the lateral-facing opening is disposed proximally of a distal end of the high pressure lumen.

9. The thrombectomy apparatus of claim 1 , wherein the lateral-facing opening is disposed at a first position along a length of the high pressure-lumen.

10. The thrombectomy apparatus of claim 9 , wherein the sidewall of the low pressure lumen comprises a through side opening that, when viewed in a direction transverse to a longitudinal axis of the low pressure lumen, overlaps the lateral-facing opening in the high pressure lumen.

11. A thrombectomy apparatus configured to connect to a high pressure source and a suction source, the thrombectomy apparatus comprising:

an elongate shaft comprising a distal region defining a distal end;

a frame structure disposed near a distally-facing opening in the distal region;

a low pressure lumen extending within the elongate shaft to the distally-facing opening at the distal end, the low pressure lumen being in fluid connection with a vacuum source;

a high-pressure lumen in fluid communication with the low pressure lumen toward the distal region of the elongate shaft, the high pressure lumen being in fluid communication with the high pressure source and terminating toward the distal region in a first jet orifice configured to form a first jet of fluid directed within the low pressure lumen so that the first jet of fluid contacts a sidewall of the low pressure lumen and causes turbulence within the low pressure lumen to break up thrombi passing into the low pressure lumen, an opening of the first jet orifice being formed in a surface forming the low pressure lumen and proximal a terminal distal end of the high pressure lumen, the first jet orifice comprises a central axis which extends obliquely with respect to a longitudinal axis of the low pressure lumen, a second jet orifice being disposed within a hollow portion of the frame structure that is disposed distal the distal end of the low pressure lumen and in fluid communication with the high pressure lumen, the frame structure supporting a membrane that is at least substantially impermeable to blood flow, a second jet of fluid exiting from the second jet orifice, a direction of the first jet of fluid exiting from the first jet orifice is generally between:

(A) perpendicular to the longitudinal axis of the low pressure lumen at the distally-facing opening; and

(B) parallel to the longitudinal axis and toward a proximal end of the low pressure lumen from the distal opening.

12. The thrombectomy apparatus of claim 11 , wherein the high pressure lumen extends alongside the low pressure lumen.

13. The thrombectomy apparatus of claim 11 , wherein the high pressure lumen extends to a position proximate the distal end of the elongate shaft.

14. The thrombectomy apparatus of claim 11 , further comprising a guidewire lumen that extends alongside one of the high pressure lumen and the low pressure lumen.

15. The thrombectomy apparatus of claim 11 , wherein the first jet of fluid traverses the low pressure lumen.

16. The thrombectomy apparatus of claim 11 , wherein the fluid for the first jet and the second jet is selected from saline or a therapeutically acceptable fluid.

17. The thrombectomy apparatus of claim 11 , further comprising an external sheath.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 15, 2022
From: JENSON, MARK L.; DRASLER, WILLIAM J.; THIELEN, JOSEPH M.
To: BOSTON SCIENTIFIC SCIMED, INC.
Reel/Frame 060812/0163 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 15, 2022
From: BOSTON SCIENTIFIC SCIMED, INC.
To: WALK VASCULAR, LLC
Reel/Frame 060812/0182 →
Continuity (7)
Continuation 16421649 · May 24, 2019
Continuation 15497357 · Apr 26, 2017
Continuation 14513579 · Oct 14, 2014
Continuation 12040179 · Feb 29, 2008
Continuation 12026317 · Feb 5, 2008
Provisional Application 60888265 · Feb 5, 2007
Related Publication 20220387063A1 · Dec 8, 2022
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