Occlusion Patch Adhesive Activation and Detachment Mechanism
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Solution Overview
Problem
Existing occlusive devices for cardiovascular defects require an extended period for patch attachment and removal, making procedures inconvenient and prone to complications like thrombosis or infection.
Innovation Solution
The method involves using an inactive adhesive on the occlusion patch that activates upon contact with cardiac tissue or employing a detachment mechanism in the balloon catheter for immediate release, allowing for accelerated attachment and release of the patch, respectively, using bio-degradable materials that are metabolized or eroded over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metallic frame is used to provide permanent support for the occlusion device, then the device can maintain its position on the cardiac structure, but the patient is exposed to risks including wire fractures, perforations, and potential leaching of toxic materials
Solution Approach 1:
The patent removes the metallic frame component from the occlusion device, extracting the harmful element while retaining the essential occlusion function through an all-polymer construction that eliminates toxic material leaching and wire fracture risks
Solution Approach 2:
The patent employs composite polymeric materials including shape memory polymers and self-hardening polymers to create a device that provides structural support and positional stability without metallic components, achieving both reliability and biocompatibility
2Reliability
If the patch is attached using coagulation/endothelialization process, then the patch adheres to the cardiac tissue, but the procedure requires an extended period of time which makes it inconvenient and prone to complications
Solution Approach 1:
The patent applies adhesive to the patch before delivery to the patient, performing the attachment preparation in advance so that when the patch is positioned, attachment occurs immediately upon contact with cardiac tissue, eliminating the extended waiting period
Solution Approach 2:
The patent changes the chemical state of the adhesive from inactive to active through exposure to bodily fluids or specific triggers, enabling rapid activation of the attachment process at the desired location and time, reducing procedure duration while maintaining reliable adhesion
3Ease of operation
If the adhesive is applied in inactive form to the patch, then the patch can be delivered and positioned correctly, but the adhesive must be activated after placement to ensure proper attachment
Solution Approach 1:
The patent designs the adhesive to automatically activate through self-service mechanisms such as exposure to bodily fluids, pH changes, or temperature variations in the implantation site, eliminating the need for external activation equipment or complex control systems
Solution Approach 2:
The patent uses bodily fluids or environmental conditions at the implantation site as intermediaries to trigger adhesive activation, allowing the biological environment itself to serve as the activation mechanism without adding device complexity
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
This approach enables convenient outpatient procedures with reduced complications, facilitating quicker defect correction and minimizing risks associated with metallic devices.
Implementation Method 1
an inactive adhesive on the occlusion patch that activates upon contact with cardiac tissue
Implementation Method 2
using bio-degradable materials that are metabolized or eroded over time
Data Source
AI summary
A method and apparatus for suture-less placement of an occluding patch in which release of the device can be accelerated. In one embodiment, an inactive form of an adhesive is applied on the area of the patch that will come into contact with cardiac tissue; this allows for the introduction and necessary manipulation of the catheter system until activation of the adhesive occurs. In accordance with one aspect of the invention, the adhesive properties of certain polymeric materials are relied upon rather than their ability to cure or harden into a specific shape. In another embodiment, the patch is immediately released utilizing a detaching mechanism on the balloon or the balloon catheter which supports the patch; the patch along with the inflated balloon remain on the cardiac structure occluding the opening.