US 2026/0144556 A1Published application

Mechanical aspiration syringe and associated fluid flow control devices

AssigneeInnova Vascular, Inc.

InventorsCheng Ian, James Dinh, Greg Bak-Boychuk, Paul Mullen, Sanjay Shrivastava

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Abstract

A vacuum generating device (i.e., mechanical aspiration syringe) and associated fluid flow control devices for thrombectomy are provided. The mechanical aspiration syringe comprises a plunger operatively connected to a tension-generating member and ratcheting lever(s), and can be configured in a “primed” or “charged” state, whereupon vacuum activation via actuation of a ratchet locking member will release the tensioned plunger, thereby initiating aspiration of clot material into a chamber. Fluid control devices and related devices for use in thrombectomy are also provided, including fluid decoupling dampers, slit valve assemblies, gate valve assemblies, and plunger valve assemblies.

Claims20

Dependent claims

1) An vacuum-generating device (010) for intravascular aspiration of clot material, the device comprising:

a) a plunger (200) having a proximal plunger end (201) and a distal plunger end (202), the plunger (200) comprising one or more pawls (210) disposed at least partially around an outer circumference (203) of the plunger (200);
b) a chamber (100) having a proximal chamber end (101) and a distal chamber end (102), the plunger (200) slidably disposed within the chamber (100) and configured to form a fluid-tight seal with an inner wall of the chamber, the chamber (100) configured to generate a vacuum when the plunger (200) is drawn towards the proximal chamber end (101), the distal chamber end (102) having an aspiration port (120) disposed thereon;
c) a tension-generating member (300) having a proximal end (301) and a distal end (302), disposed within the chamber (100), the distal tension-generating member end (302) operatively connected to the proximal plunger end (201), the proximal tension-generating member end (301) operatively connected to a tension-generating member attachment point (310), the tension-generating member attachment point (310) disposed on or proximate to the proximal chamber end (101);
the tension-generating member (300) configured to apply a force to the plunger (200) and draw the plunger (200) towards the proximal chamber end (101);
d) a ratcheting lever (400) having a proximal ratcheting lever end (401) and a distal ratcheting lever end (402), the distal ratcheting lever end (402) configured to engage the one or more pawls (210) of the plunger (200), the proximal ratcheting lever end (401) configured to move the distal ratcheting lever end (402) along the pawls (210) towards the proximal plunger end (201) when the proximal ratcheting lever end (401) is actuated;
and
e) a ratchet locking member (500) configured to engage the one or more pawls (210), selectively hold the plunger (200) in a tensioned position, and release the plunger upon actuation of the ratchet locking member (500);
wherein the plunger (200), when drawn towards the distal chamber end (102), generates potential energy in the tension-generating member (300);
wherein a vacuum is generated and released via the aspiration port (120) thereby aspirating at least a portion of the clot material into the chamber (100) when the ratchet locking member (500) is actuated when the plunger (200) is in a tensioned position, thereby releasing the plunger (200) from its tensioned position and allowing it to travel towards the proximal chamber end (101), thereby generating a vacuum.

6 more elements

5) A slit valve assembly (700) for use in intravascular thrombectomy, comprising:

a) a seal housing (710) comprising a seal receptacle (715) disposed within the seal housing (710), a proximal housing end (711), a distal housing end (712), a proximal housing port (721) disposed on the proximal housing end (711), and a distal housing port (722) disposed on the distal housing end (712), the proximal housing port (721) fluidly connected to the seal receptacle (715), the seal receptacle (715) fluidly connected to the distal housing port (722), the distal housing port fluidly connected to a catheter (025);
b) an elastomeric seal (730) disposed in the seal receptacle (715), the elastomeric seal (730) having a slit (735) fluidly connecting a proximal elastomeric seal side (731) to a distal elastomeric seal side (732);
wherein, the elastomeric seal (730) is self-sealing when fluid is present on the distal elastomeric seal side (732) such that said fluid will not substantially leak from the distal elastomeric seal side (732) of the slit (735) onto the proximal elastomeric seal side (731);
wherein, when a hollow member (075) is inserted from the proximal elastomeric seal side (731) through the slit (735), fluid may flow from the catheter (025), through the slit (735), and into the hollow member (075).

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 19/396,914Filed 21 Nov 2025
Priority: 22 Nov 2024
Published: 28 May 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

A61B 17/22
Surgical instruments, devices or methods: implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out…
A61M 1/815
Piston pumps, e.g. syringes: the barrel serving as aspiration container, e.g. in a breast pump
A61M 39/24
Valves or arrangement of valves: check- or non-return valves
F16K 15/147
The closure elements being fixed along all or a part of their periphery: the closure elements having specially formed slits or being of an…