Medical Device Detachment System with Proximal Sensors
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Solution Overview
Problem
Current medical device detachment systems for treating aneurysms, such as embolic coils, are inefficient due to time-consuming methods like electrolysis or laser release, which prolong procedures and increase costs, particularly in releasing coils within the vasculature.
Innovation Solution
A medical device detachment system featuring a housing with a grasping mechanism, user input mechanism, and sensors that provide feedback through indicators like LEDs to confirm proper seating and detachment of the core member, allowing for precise and efficient release of embolic coils within the vasculature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrolysis or laser release methods are used to detach embolic coils, then the coil can be released within the vasculature, but the procedure time increases and costs increase
Solution Approach 1:
The patent extracts the detachment mechanism from the distal end of the delivery catheter and places it at the proximal end, outside the vasculature. The core member is pulled back through the delivery catheter to engage the embolic coil, allowing detachment to occur externally rather than requiring time-consuming electrolysis or laser release procedures within the vessel.
Solution Approach 2:
The patent replaces the chemical/electrical detachment methods (electrolysis, laser release) with a purely mechanical pull-back mechanism. The core member is retracted proximally to engage and pull the embolic coil out of the delivery catheter, eliminating the need for complex electrolytic or laser-based detachment systems.
2Reliability
If electrolysis or laser release methods are used to detach embolic coils, then the coil can be released within the vasculature, but manufacturing and equipment costs increase
Solution Approach 1:
The patent extracts the detachment mechanism from the distal end of the delivery catheter and places it at the proximal end, outside the vasculature. The core member is pulled back through the delivery catheter to engage the embolic coil, allowing detachment to occur externally rather than requiring time-consuming electrolysis or laser release procedures within the vessel.
Solution Approach 2:
The patent employs a simple, disposable core member that is discarded after a single use. This eliminates the need for expensive, reusable laser generators or electrolytic power supplies, significantly reducing both manufacturing costs and equipment investment while maintaining reliable detachment functionality.
3Measurement precision
If sensors and indicators are added to provide feedback on core member positioning, then detachment precision improves, but device complexity increases
Solution Approach 1:
The patent incorporates sensors that detect the position of the core member relative to the delivery catheter and provide real-time feedback through visual indicators. This allows the operator to precisely determine when the core member is properly positioned for engagement with the embolic coil, ensuring accurate detachment without excessive device complexity.
Solution Approach 2:
The patent uses color-changing indicators (such as LEDs or visual markers) to communicate the position of the core member to the operator. Different colors or visual states indicate whether the core member is properly positioned, engaged with the embolic coil, or in the process of detachment, providing intuitive feedback without requiring complex display systems.
Data Source
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AI summary
A medical device detachment system receives an elongate delivery member, having a lumen, and an elongate core member. The system includes a housing, a user input mechanism for receiving a user input to effect detachment of a medical device, such as an embolic coil, from a distal end of the delivery member, and a grasping mechanism for grasping and moving a proximal end of the core member relative to a proximal end of the delivery member. The system also includes a first sensor detecting positioning of the proximal end of the core member within the housing, and a second sensor, detecting movement of the grasping mechanism. An indicator is connected to the first and second proximity sensors and provides feedback to a user.