Mechanical Detachment System for Embolic Coil Deployment
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Solution Overview
Problem
Traditional systems for delivering embolic coils to cerebral aneurysms using electrolytic detachment mechanisms often cause undesired thrombotic events, have high detachment failure rates, and are time-consuming, leading to increased risks of blood clots and anoxic injuries.
Innovation Solution
A mechanical detachment system with a memory metal tab and anchoring element, which allows for rapid and reliable deployment of embolic coils within the aneurysm, reducing the risk of thrombotic events and detachment failures by mechanically decoupling the coil from the detachment system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrolytic detachment mechanisms are used to deploy embolic coils, then the coils can be deployed within the aneurysm, but gas bubbles are generated at the detachment zone causing thrombotic events
Solution Approach 1:
The patent replaces the electrolytic detachment mechanism with a mechanical detachment system. The mechanical system uses a detachable connector that physically separates the delivery catheter from the embolic coil through mechanical action rather than electrical current, eliminating gas bubble generation and associated thrombotic risks while maintaining reliable coil deployment within the aneurysm
2Reliability
If electrolytic detachment mechanisms are used, then embolic coils can be deployed, but the procedure time is increased due to heating requirements
Solution Approach 1:
The mechanical detachment system eliminates the heating step required by electrolytic mechanisms. The detachable connector allows for rapid mechanical separation through simple manual manipulation or external actuation, reducing detachment time from minutes (heating period) to seconds while maintaining reliable detachment of the embolic coil from the delivery catheter
3Ease of operation
If electrolytic detachment systems are used, then embolic coils can be deployed, but detachment failure rate is high due to electrical equipment failure
Solution Approach 1:
The patent replaces complex electrical detachment systems with a straightforward mechanical detachment mechanism. The detachable connector uses simple mechanical interlocking and release features that are less prone to failure, eliminating dependencies on electrical equipment, current delivery, and heating elements, thereby significantly reducing detachment failure rates while maintaining ease of operation
Solution Approach 2:
The mechanical detachment system employs a disposable detachable connector that is designed for single use. This eliminates the need for complex, expensive, and potentially failure-prone electrical systems while providing reliable, simple mechanical detachment. The connector is discarded after single use, ensuring no contamination or mechanical wear affects subsequent procedures
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 mechanical detachment system significantly reduces the risk of thrombotic events, decreases detachment time, and lowers the failure rate compared to traditional electrolytic systems, providing a safer and more efficient method for deploying embolic coils.
Implementation Method 1
a tab comprising a memory material and having a first position and a second position, wherein the memory material is configured to move the tab from the first position to the second position
Data Source
AI summary
Systems and methods are provided for delivering and mechanically detaching embolic coils. The systems disclosed herein comprise a mechanical detachment mechanism to intravascularly release an embolic coil. The methods disclosed herein comprise a various triggering mechanisms to detach embolic coils.