Inverting Braided Aneurysm Treatment System

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Solution Overview

Problem

Current embolic implants for aneurysm therapy face challenges such as incomplete occlusion, recanalization, and complications like blood flow obstruction due to the limitations of embolic coils, particularly in treating complex aneurysm morphologies like wide neck or bifurcations, necessitating additional devices like stents or balloons for support.

Innovation Solution

A tubular braid system with a predetermined shape that can be constricted for delivery and self-expand within an aneurysm sac, featuring a sack-like structure with a pinched end and inversions, allowing for secure anchoring and occlusion of the aneurysm neck, combined with an embolic coil for enhanced treatment efficacy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If embolic coils are used to fill the aneurysm sac, then the aneurysm can be occluded, but blood flow obstruction in the parent vessel may occur and the coils cannot be easily retracted or repositioned

Engineering Contradiction:

Improveaneurysm occlusionVSAvoidcoil retraction and repositioning

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The braid is designed with dynamic properties that allow it to be compressed into a low-profile configuration for delivery through a catheter, then self-expand to a functional configuration upon deployment. This dynamic transformation enables the device to be easily delivered and repositioned while maintaining reliable occlusion once deployed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The braid is nested within a delivery catheter in a compressed state during delivery. The catheter serves as a delivery sheath that contains the braid until the desired position is reached, at which point the braid is released and self-expands. This nesting approach enables easy delivery and repositioning before final deployment.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If embolic coils are used to treat the aneurysm neck, then blood flow into the aneurysm can be inhibited, but the flow of blood in the adjoining blood vessel may be impeded

Engineering Contradiction:

Improveaneurysm neck occlusionVSAvoidblood flow obstruction in parent vessel

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The braid is designed with varying properties along its length, with the first portion having a different configuration than the second portion. The first portion is configured to occlude the aneurysm neck while the second portion is configured to maintain patency of the parent vessel, allowing selective occlusion at the local level without affecting overall blood flow.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The braid is divided into distinct segments or portions with different functions. The first portion targets the aneurysm neck for occlusion while the second portion maintains blood flow in the parent vessel. This segmentation allows the device to perform multiple functions simultaneously, occluding the aneurysm while preserving parent vessel patency.

Inventive Principle:

Principle #1Segmentation

3Reliability

If multiple embolic coils are used to fill the aneurysm sac, then the aneurysm can be occluded, but the treatment complexity increases and ancillary devices are required

Engineering Contradiction:

Improveaneurysm occlusionVSAvoidtreatment devices and procedures

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The braid integrates multiple functions into a single device: it can occlude the aneurysm neck, fill the aneurysm sac, and maintain parent vessel patency all in one implant. This consolidation eliminates the need for multiple separate coils and ancillary devices such as stents or balloons, simplifying the overall treatment approach.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The braid is designed as a universal device that can perform multiple functions depending on its configuration and deployment. It can occlude vessels, fill sacs, and maintain patency, making it a multi-functional alternative to multiple specialized devices, thereby reducing treatment complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If the aneurysm entrance is overpacked with embolic coils, then occlusion is achieved, but blood flow obstruction in the parent vessel occurs

Engineering Contradiction:

Improveaneurysm entrance occlusionVSAvoidparent vessel flow obstruction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11278292B2Inverting braided aneurysm treatment system and method

Publication Date: 2022.03.22 DEPUY SYNTHES PROD INC

AI summary

An example system can include a tubular braid, a catheter, and an embolic coil. The tubular braid can have an open end, a pinched end, and a predetermined shape. In the predetermined shape, the tubular braid can have two inversions and a middle segment extending between the two inversions that forms a sack. The tubular braid can be implanted in an implanted shape based on the predetermined shape. A distal end of the catheter can be inserted into the sack when the tubular braid is implanted. The embolic coil can be delivered through the catheter into the sack. The opening to the sack can correspond to a constricted columnar segment of the middle segment when the braid is in the predetermined shape.