Crossover Guidewire Delivery for Low-Profile Bifurcated Prostheses

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Solution Overview

Problem

Existing endovascular aneurysm treatment systems face challenges with large transverse profiles, lateral stiffness, and complex delivery processes, particularly when treating aneurysms near branched vessels, which often require multiple cannulation steps and guidewire crossover techniques that are time-consuming and difficult to perform.

Innovation Solution

A bifurcated prosthesis delivery system with a flexible, low-profile design, featuring a main tubular body with ipsilateral and contralateral legs, an outer tubular sheath, and an inner tubular member, allowing for a crossover guidewire to facilitate guidewire access from one side of the vascular system to the other, with features like inflatable channels and dual lumen catheters to enhance maneuverability and guidewire retention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If existing endovascular aneurysm treatment systems are used, then aneurysm treatment can be achieved, but the systems have large transverse profiles and lateral stiffness that complicate the delivery process

Engineering Contradiction:

Improveaneurysm treatment effectivenessVSAvoiddelivery process complexity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The delivery system is divided into multiple segments including an outer catheter, inner catheter, and guidewire components. This segmentation allows each component to be optimized independently for flexibility and deliverability while maintaining overall system functionality for reliable aneurysm treatment

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs a nested structure where the inner catheter is positioned within the outer catheter, and the guidewire is positioned within the inner catheter. This nested configuration reduces the overall transverse profile during delivery while maintaining the necessary structural integrity and functionality for reliable aneurysm treatment

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If existing systems are used to treat aneurysms near branched vessels, then treatment can be achieved, but multiple cannulation steps and guidewire crossover techniques are required which are time-consuming and difficult

Engineering Contradiction:

Improvetreatment effectiveness for branched vesselsVSAvoidprocedural time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The delivery system is pre-configured with the guidewire positioned within the inner catheter before the procedure begins. This preliminary arrangement eliminates the need for time-consuming guidewire crossover maneuvers during the procedure, allowing direct access to branched vessels and significantly reducing procedural time while maintaining treatment reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The integrated delivery system with pre-positioned guidewire serves multiple functions simultaneously - it provides both the delivery mechanism for the prosthesis and the guidewire for navigation into branched vessels. This multi-functionality eliminates the need for separate cannulation steps and makes the system equally effective for both simple and complex aneurysm cases

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If existing systems are used, then aneurysm treatment can be performed, but the systems have greater than desired lateral stiffness that complicates delivery

Engineering Contradiction:

Improvetreatment effectivenessVSAvoidlateral stiffness

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent utilizes flexible catheter constructions with thin-walled tubular structures that provide adequate strength for delivery while maintaining high flexibility. The outer and inner catheters are designed with wall thicknesses and material properties that balance structural integrity with the ability to navigate tortuous vascular anatomy, eliminating excessive lateral stiffness while maintaining treatment reliability

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The delivery system employs composite material constructions combining different materials with complementary properties - such as combining flexible polymers with reinforcing elements - to achieve the optimal balance between flexibility for navigation and strength for maintaining prosthesis integrity during deployment

Inventive Principle:

Principle #40Composite materials

Data Source

PatentUS20260026951A1Systems and methods for guidewire crossover for bifurcated prostheses

Publication Date: 2026.01.29 TRIVASCULAR2 INC

AI summary

An endovascular delivery system having an elongate outer tubular sheath, an elongate inner tubular member releasably disposed within the elongate outer tubular sheath and an elongate crossover guidewire slidably disposed within the elongate outer tubular sheath.