Implantable Device Detachment System Split Tube Coupling
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Solution Overview
Problem
Current detachment systems for deploying implantable medical devices, such as embolic coils, in body vessels face challenges in ensuring complete release and deployment due to lack of positive means for separating interlocking clasps, leading to incomplete deployment and increased risk of trauma to surrounding tissue.
Innovation Solution
A detachment system comprising a hollow distal tube with a compressible portion that moves between compressed and elongated conditions, engaged by a loop wire and locking member, allowing for secure deployment and release of the medical device through a coupling mechanism that welds the tubes together, ensuring complete deployment of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single tubular carrier with a single compressible section is used to deliver and deploy the vascular occlusion device, then the device structure is simplified, but the release speed and deployment completeness are insufficient
Solution Approach 1:
The tubular carrier is divided into multiple compressible sections (first compressible section and second compressible section) along its length, allowing sequential compression and deployment. This segmentation enables faster release by distributing the deployment action across multiple zones, resolving the contradiction between structural simplicity and release speed.
Solution Approach 2:
The compressible sections are designed to dynamically change from a compressed delivery state to an expanded deployment state. This dynamic transformation allows the carrier to adapt its structure during deployment, enabling rapid release while maintaining structural integrity, thus improving productivity without excessive complexity.
2Ease of operation
If interlocking clasps are held together by a control wire without positive separation means, then the system is simpler to operate, but complete release and deployment of the coil cannot be ensured
Solution Approach 1:
The locking mechanism is extracted as a separate functional element from the control wire system. By providing a distinct positive separation means (such as a release mechanism or disconnect feature), the patent ensures reliable deployment while maintaining operational simplicity. The separation function is isolated and dedicated, preventing incomplete release.
Solution Approach 2:
An intermediary mechanism is introduced between the control wire and the interlocking clasps to provide positive separation. This intermediary element mediates the release action, ensuring that the clasps are definitively separated when deployment is initiated, thus guaranteeing deployment completeness without complicating the overall operation.
3Stability of the object's composition
If the compressible portion is not automatically released after deployment, then the engagement system remains stable, but trauma risk to surrounding tissue increases and deployment efficiency decreases
Solution Approach 1:
The compressible portion is pre-configured with automatic release capability that activates after deployment. This preliminary action ensures that once the medical device is deployed, the compressible portion automatically returns to its original state, eliminating the need for manual intervention and reducing tissue trauma risk while maintaining stability during the critical engagement phase.
Solution Approach 2:
The compressible portion is designed to self-release automatically after deployment without requiring additional control actions. This self-service mechanism ensures that the engagement system maintains stability during deployment while automatically eliminating the compressed state afterward, reducing tissue trauma and improving overall deployment efficiency.
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 system ensures reliable and complete deployment of implantable medical devices by using a compressible portion that automatically returns to its elongated condition upon disengagement, reducing the risk of trauma to surrounding tissue and improving the efficiency of the deployment process.
Implementation Method 1
a compressible portion of the distal tube itself axially movable from a compressed condition to an elongated condition, between the proximal and distal ends
Implementation Method 2
a coupling disposed between the proximal end of the distal tube and the distal end of the proximal tube, joining the proximal and distal tubes
Data Source
AI summary
A method of constructing a detachment system for delivering an implantable medical device to a target location of a body vessel is presented. The method includes forming a compressible portion on a distal tube, engaging an implantable medical device with an engagement system, extending the engagement system through the distal tube such that the implantable medical device is distal of a distal end of the distal tube, applying a force to the engagement system to compress the compressible portion to a compressed state, fixing the engagement system to the distal tube to maintain the compressed state of the compressible portion, and joining a proximal end of the distal tube to a distal end of a proximal tube. The engagement system can include a loop wire that is fixed to the distal tube and engages the medical device.