Retrograde Blood Flow Occlusion Flushing Device

a technology of occlusion and flushing device, which is applied in the field of endovascular medical system, can solve the problems of to advance the micro-catheter across, around or over the clot without the aid of the guidewire, and the embolus is difficult, if not impossible to remove, compression, shearing and/or fragmentation (in whole or in parts)

Pending Publication Date: 2022-05-05
NEURAVI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The device effectively recanalizes blood flow with minimal risk of clot compression or shearing, allowing for successful reperfusion by creating a controlled environment for clot aspiration and removal, improving treatment outcomes for acute ischemic stroke.

Problems solved by technology

In many cases, due to its flexibility, it is very difficult to advance the microcatheter across, around or over the clot without the aid of the guidewire.
Some clots, occlusions or blockages are difficult, if not impossible, to remove using conventional mechanical thrombectomy for the treatment of acute ischemic stroke.
Undesirably, multiple attempts or passes of the mechanical thrombectomy device (e.g., stent-retriever) may result in compression, shearing and / or fragmentation (in whole or in parts) of the embolus.

Method used

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  • Retrograde Blood Flow Occlusion Flushing Device
  • Retrograde Blood Flow Occlusion Flushing Device
  • Retrograde Blood Flow Occlusion Flushing Device

Examples

Experimental program
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Embodiment Construction

[0032]The terms “distal” or “proximal” are used in the following description with respect to a position or direction relative to the treating physician or medical interventionalist. “Distal” or “distally” are a position distant from or in a direction away from the physician or interventionalist. “Proximal” or “proximally” or “proximate” are a position near or in a direction toward the physician or medical interventionist. The terms “occlusion”, “clot” or “blockage” are used interchangeably.

[0033]FIG. 1 is an exemplary illustration of a blood pressure environment of a blockage in the distal and proximal vessel segments or a portion of a vessel. A normal direction of blood flow or circulation is represented by an arrow (fa), hereinafter referred to as anterograde blood flow. Blood pressure (Pp) represents the pressure on the proximal side or face of a blockage 100, while a blood pressure (Pd) represents the pressure on the opposite distal side or face of the blockage 100. The blood pr...

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Abstract

A device and method for establishing retrograde blood flow during recanalization of a vessel having a targeted blockage. While in a collapsed state an occluding component is introduced distally intravascularly traversing the targeted blockage to its distal side. Then, the occluding component transitions to an expanded state having an enlarged diameter forming a seal with an internal wall of the vessel prohibiting anterograde blood flow beyond the expanded occluding component. Retrograde blood flow is thereby established in a region of the vessel bound at one end by the occluding component and at an opposite end by the targeted blockage by dispensing a flushing fluid into the region of the vessel.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 16 / 152,159, filed on Oct. 4, 2018, herein incorporated by reference in its entirety.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to an endovascular medical system. In particular, the present invention is directed to an improved procedure and treatment of acute ischemic stroke using a retrograde blood flow occlusion flushing device.Description of Related Art[0003]Acute ischemic stroke is caused by a thrombotic or embolic occlusion (e.g., blockage) in a cerebral artery of the brain. The occlusion is typically caused by a blood clot liberated from another part of the body which travels in an anterograde direction (in the direction of normal blood flow) through the vessel and eventually becomes lodged in the cerebral artery of the brain. Clots are subject to a pulsatile pressure gradient (i.e., systemic blood pressure acting on the p...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61B17/3203A61B17/12A61B17/22
CPCA61B17/32037A61B17/1204A61B17/12109A61B17/12136A61M25/0026A61B2017/22038A61B2017/22094A61B2217/007A61B17/22031A61B17/221A61B2017/22051A61M25/10A61B17/22A61B2017/22067A61B2017/22034A61B2017/22035A61B17/12168A61M2025/1052A61M25/104A61M31/005A61M25/003A61M25/0662A61M2025/0681A61M25/10181A61B2017/22079A61B2017/22001A61M2025/109A61M2025/1061
InventorMCCARTHY, RAY
OwnerNEURAVI