Granted Patent
B2
US 12,521,523 · App. 18/238,299 · Granted Jan 13, 2026
Catheter systems for applying effective suction in remote vessels and thrombectomy procedures facilitated by catheter systems
Inventors:
Matthew F. Ogle (Edina, MN); James Alexander (Excelsior, MN); Alexander Halaszyn (St. Paul, MN)
Assignee:
Route 92 Medical, Inc.
A61M25/0074A61B17/22A61M1/84A61M25/09A61M25/10A61B2017/00991A61B17/22032A61B2017/22079A61B2017/2212A61B2217/005A61M2025/0004A61M2025/0006A61M25/0068A61M2025/0175
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Abstract
A suction catheter system is described with a suction nozzle that can extend from a guide catheter of the like. The suction nozzle can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension within the lumen of the guide catheter. A suction lumen extends from the proximal end of the guide catheter through at least part of the guide catheter central lumen and through the suction tip. Desirable suction flow can be established using the guide lumen to facilitate the suction. Also, a delivery catheter is described with an elastic tip that can track closely over a guidewire. The elastic tip of the delivery catheter can be expanded to provide for the delivery of medical devices past the tip.
Claims (31)
1 . A suction catheter system comprising:
a guide catheter comprising a tubular shaft with a central lumen having an inner diameter, a proximal end and a distal opening, and a proximal section operably connected with the proximal end of the tubular shaft and having fittings that connect to a suction device; and
a suction extension comprising:
a proximal portion comprising a polymer tube having a metal reinforcement structure embedded within the polymer tube;
a suction tip comprising a distal opening and extending from the proximal portion in a distal direction; and
a control structure comprising a distal end region coupled to the proximal portion,
wherein the suction tip has a distal inner diameter that is from about 20 percent to about 90 percent of the central lumen inner diameter,
wherein the proximal portion is configured to slide within the central lumen of the tubular shaft to change the relative position of the proximal portion within the central lumen and provide for at least a portion of the suction extension to extend outward from the distal opening of the tubular shaft at appropriate configurations of the proximal portion,
wherein the distal end region of the control structure couples to the metal reinforcement structure and is embedded within the polymer tube of the proximal portion forming a sealing region with the central lumen of the guide catheter, and
wherein a seal provided by the sealing region forms a suction lumen extending from the fittings configured to connect to the suction device through a portion of the central lumen, the proximal portion, and the suction tip to the distal opening.
2 . The suction catheter system of claim 1 , wherein the guide catheter comprises a stop configured to retain a portion of the proximal portion of the suction extension within the central lumen.
3 . The suction catheter system of claim 1 , wherein the proximal portion comprises a deformable element.
4 . The suction catheter system of claim 3 , wherein the deformable element has an engaged configuration where the proximal portion is at a fixed location within the central lumen and wherein the deformable element has an unengaged configuration where the proximal portion is configured to slide within the central lumen of the tubular shaft.
5 . The suction catheter system of claim 4 , wherein the deformable element engages with a rod that can apply mechanical force to extend the deformable element.
6 . The suction catheter system of claim 4 , wherein the deformable element engages with conductive wires that actuate engagement upon the application of current.
7 . The suction catheter system of claim 6 , wherein the deformable element comprises a magnet.
8 . The suction catheter system of claim 4 , wherein the deformable element is a bulge formed by a slidable loop engaging a circular ramp.
9 . The suction catheter system of claim 4 , wherein the deformable element is a bulge formed by a pivot ring.
10 . The suction catheter system of claim 4 , wherein the deformable element is a balloon located around the circumference of the proximal portion.
11 . The suction catheter system of claim 10 , wherein an interior of the balloon is in fluid communication with a fluid source.
12 . The suction catheter system of claim 1 , wherein the metal reinforcement structure is a braided wire and/or a coil.
13 . The suction catheter system of claim 12 , wherein the coil is a flat wire having a dimension of 0.0005″-0.003″.
14 . The suction catheter system of claim 12 , wherein the coil has a pitch from about 0.005″ to about 0.100″.
15 . The suction catheter system of claim 1 , wherein the polymer tube is a heat shrink polymer jacket positioned over the metal reinforcement structure.
16 . The suction catheter system of claim 15 , further comprising a polymer liner.
17 . The suction catheter system of claim 1 , wherein a difference between an outer diameter of the proximal portion and the inner diameter of the central lumen is no more than about 127 microns.
18 . The suction catheter system of claim 17 , wherein the suction extension further comprises a lubricious coating along an outer surface of the suction extension.
19 . The suction catheter system of claim 1 , wherein the suction tip of the suction extension has a length of about 3 cm to about 50 cm.
20 . The suction catheter system of claim 19 , wherein the proximal portion of the suction extension has a length of about 5 mm to about 25 cm.
21 . The suction catheter system of claim 20 , wherein the guide catheter tubular shaft has a length of about 30 cm to about 150 cm.
22 . The suction catheter system of claim 1 , wherein the distal inner diameter of the suction tip is about 0.667 mm to about 2 mm.
Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Apr 30, 2025
From: MIVI NEUROSCIENCE, INC.
To: WORLD VASCULAR, INC.
Reel/Frame 070987/0382 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 7, 2025
From: MIVI NEUROSCIENCE, INC.
To: MIVI (ABC), LLC
Reel/Frame 070150/0977 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Feb 7, 2025
From: MIVI (ABC), LLC
To: ROUTE 92 MEDICAL, INC.
Reel/Frame 070151/0848 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Aug 25, 2023
From: OGLE, MATTHEW F.; ALEXANDER, JAMES; HALASZYN, ALEXANDER
To: MIVI NEUROSCIENCE, INC.
Reel/Frame 064709/0520 →
Continuity (3)
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