Guidewire Routing Catheter Using Contrast-Guided Vessel Occlusion

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Solution Overview

Problem

Conventional coronary bypass surgery is invasive and risky for certain patients, and balloon angioplasty is not suitable for acute or complete occlusions, leaving a need for minimally invasive techniques to treat coronary artery blockages.

Innovation Solution

A catheter system with a tubular body, expandable member, and fluid injection port is used to occlude vessels, deliver contrast material, and guide guidewires through vessels for creating bypasses and deploying prostheses using minimally invasive methods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional coronary bypass surgery is performed, then complete blockage can be bypassed, but surgical trauma and risk are significant

Engineering Contradiction:

Improveeffectiveness in treating complete occlusionVSAvoidsurgical trauma

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent uses a needle as an intermediary tool to create a transseptal passage between vessels, avoiding the need for open surgery. The needle traverses through tissue to establish a connection between the first vessel and second vessel, serving as a minimally invasive mediator that achieves bypass functionality without surgical trauma

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces the mechanical open-surgery approach with a percutaneous needle-based system. Instead of surgically exposing and connecting vessels through open incisions, the method uses a needle to puncture and create a passage through tissue, substituting complex mechanical surgical procedures with a simpler percutaneous intervention

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Object-affected harmful factors

If balloon angioplasty is used, then minimally invasive treatment is achieved, but it is not suitable for acute or complete occlusions

Engineering Contradiction:

Improvesurgical traumaVSAvoidapplicability to complete occlusions

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent segments the treatment approach by dividing the bypass creation into distinct stages: first creating a transseptal passage with a needle, then delivering a guidewire through the needle tract, and finally deploying a prosthesis. This segmentation allows the system to address complete occlusions that cannot be treated by balloon angioplasty alone

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary actions by first establishing a transseptal passage and delivering a guidewire before deploying the final prosthesis. This preliminary creation of access and pathway enables subsequent deployment of devices that can treat complete occlusions, extending the applicability beyond what balloon angioplasty can achieve

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250249164A1Methods for routing a guidewire from a first vessel and through a second vessel in lower extremity vasculature

Publication Date: 2025.08.07 LIMFLOW

AI summary

A catheter system can include a tubular body, and at least one of a targeting system coupled to the tubular body, an expandable member, or a fluid injection port. A method of identifying a bifurcation can include inserting a catheter system into a first vessel, positioning the catheter system at a first location, expanding an expandable member to occlude the first vessel, delivering contrast material so the contrast material pooling proximate to the expandable member, and reviewing a shape of the contrast material in the first vessel under fluoroscopy.