Detachable Embolization Coil Connector Splitting Mechanism
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Solution Overview
Problem
Current methods for delivering embolization coils during endovascular treatment face challenges in precise and controlled placement due to difficulties in releasing the coil from the delivery system within the vasculature.
Innovation Solution
An embolization delivery system featuring a detachable coil held by compressive forces within a connector, with a release mechanism using a wire to split the connector and reduce compressive forces, allowing controlled detachment of the coil from the delivery system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a catheter with push rod is used to deliver the coil, then the coil can be advanced to the target location, but precise and controlled placement of the coil is difficult
Solution Approach 1:
The delivery system is segmented into distinct functional components: a catheter for navigation, a connector for coil attachment, and a release mechanism for controlled deployment. This segmentation allows each component to perform its specific function optimally, with the release mechanism enabling precise coil placement independent of the catheter's position.
Solution Approach 2:
A connector acts as an intermediary component between the catheter and the coil. This connector provides a controlled interface where the coil can be securely attached during delivery and then precisely released at the target location, improving placement control compared to direct push-rod delivery.
2Reliability
If the coil is held by compressive forces in the connector, then the coil remains secure during delivery, but the release mechanism complexity increases
Solution Approach 1:
The release mechanism replaces complex mechanical locking systems with a simpler wire-based cutting mechanism. The wire, when manipulated, cuts the connector to release the compressive forces holding the coil, providing a reliable yet simple release system that reduces overall device complexity.
Solution Approach 2:
The release mechanism works by changing the structural integrity parameter of the connector through wire cutting. This parameter change transitions the connector from a state of providing compressive retention forces to a state where those forces are reduced or eliminated, allowing coil release without complex mechanical systems.
3Ease of operation
If the wire cuts through the connector to release the coil, then the coil can detach, but the connector structure must be designed to split easily
Solution Approach 1:
The connector is designed with local quality variations: the bulk of the connector maintains sufficient structural strength to hold the coil securely during delivery, while specific localized regions are designed to be more vulnerable to wire cutting. This allows easy coil detachment through wire manipulation while preserving overall connector integrity during the delivery phase.
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
Enables precise and controlled deployment of the embolization coil at the target location, improving the accuracy and safety of endovascular treatments for vascular abnormalities.
Implementation Method 1
The manipulation of the wire splits part of the connector, thereby, reducing the compressive forces exerted by the connector onto the embolization coil
Implementation Method 2
a detachable embolization coil disposed within a portion of the connector and held in place by compressive forces exerted by the connector
Data Source
AI summary
An embolization delivery system (10) and a method of using said system by a physician to deliver an embolization coil (35) into the vasculature of a patient is disclosed. The embolization delivery system comprises a delivery tube (15) in the form of a catheter (15) or wire guide that may be reversibly inserted, a delivery catheter placed into the vasculature of a patient, a connector (30) disposed around and permanently coupled to the delivery tube, a detachable embolization coil disposed within a portion of the connector and held in place by compressive forces exerted by the connector, and a release mechanism (40) for detaching the embolization coil. The release mechanism includes a wire (50) with one end (51) being coupled to the catheter, a middle portion (52) being in contact with both the connector and coil, and a second end that may be manipulated in a predetermined manner by the attending physician. The manipulation of the wire splits part of the connector, thereby, reducing the compressive forces exerted by the connector onto the embolization coil and allowing the coil to detach from the embolization delivery system.