Self-Expanding Coring Thrombus Extraction Device

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current methods for treating deep vein thrombosis (DVT) are inadequate due to high recurrence rates, inability to effectively remove large clot volumes, and complex treatment procedures involving multiple devices and pharmaceuticals.

Innovation Solution

A thrombus extraction device comprising a self-expanding coring portion connected to a braided net that cores and separates large clot volumes from blood vessels, reducing the need for thrombolytics and minimizing bleeding risks and recovery time.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If current DVT treatment methods are used, then treatment can be provided, but high recurrence rates and inability to remove large clot volumes occur

Engineering Contradiction:

ImproveDVT treatment effectivenessVSAvoidclot removal capability

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies the extraction principle by designing a device that physically removes thrombus material from blood vessels. The self-expanding coring portion with cutting edges cores and extracts large volumes of clot material, while the braided net captures and contains the removed thrombus for withdrawal from the body. This mechanical extraction approach directly addresses the inability of current methods to remove large clot volumes effectively.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The device segments the thrombus removal process into distinct functional components: the self-expanding coring portion for cutting and separating clot material, the braided net for capturing and containing fragments, and the delivery system for positioning and retrieval. This segmentation allows each component to be optimized for its specific function, improving overall effectiveness and reliability of thrombus removal.

Inventive Principle:

Principle #1Segmentation

2Reliability

If thrombolytic pharmaceuticals are used extensively, then clot dissolution can occur, but bleeding risk increases

Engineering Contradiction:

Improveclot dissolution effectivenessVSAvoidbleeding risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent replaces the chemical mechanism of thrombolytic pharmaceuticals with a mechanical system for thrombus removal. The self-expanding coring portion mechanically cores and separates clot material through cutting edges, while the braided net mechanically captures and contains fragments. This mechanical approach achieves clot removal without the systemic bleeding risks associated with thrombolytic drug therapy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If multiple treatment devices and pharmaceuticals are used, then comprehensive treatment can be provided, but treatment complexity increases

Engineering Contradiction:

Improvetreatment comprehensivenessVSAvoidnumber of treatment components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple treatment functions into a single integrated device. The self-expanding coring portion and braided net are combined into one unit that can be delivered through a single catheter system. This unified device performs clot cutting, fragment capture, and containment in one procedure, eliminating the need for multiple separate devices and pharmaceutical interventions, thereby reducing treatment complexity while maintaining comprehensiveness.

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The device effectively removes large clot volumes with reduced risk of bleeding and shorter recovery times, lowering healthcare costs and improving treatment efficacy for DVT.

Implementation Method 1

The thrombus extraction device may comprise a self-expanding coring portion connected to a braided net so as to effectively core and separate large volumes of thrombus from large vessels

Methodology Applied

Scientific EffectSelf-expanding: Elastic Recovery

Implementation Method 2

capturing the separated thrombus in the braided net

Methodology Applied

Scientific EffectPhysical containment: Physical Containment

Data Source

PatentUS10524811B2Intravascular treatment of vascular occlusion and associated devices, systems, and methods

Publication Date: 2020.01.07 STRYKER CORP

AI summary

Systems and methods for treating thrombosis and or emboli in a peripheral vasculature of a patient are disclosed herein. The method can include providing a thrombus extraction device including a proximal self-expanding coring portion formed of a unitary fenestrated structure and a distal expandable tubular portion formed of a braided filament mesh structure; advancing a catheter constraining the thrombus extraction device through a vascular thrombus in a vessel; deploying the thrombus extraction device from the catheter from a constrained configuration to an expanded configuration; retracting the thrombus extraction device proximally so that the coring portion cores and separates a portion of the vascular thrombus from the venous vessel wall while the mesh structure captures the vascular thrombus portion; and withdrawing the thrombus extraction device from the patient to remove the vascular thrombus portion from the vessel.