Medical Device Delivery System Adapter Piece Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current delivery systems for implanting medical devices, such as leadless pacemakers, face challenges in safely and easily releasing the device from the system after implantation and testing, requiring partial detachment during positioning and potential repositioning, which can be complex and prone to mechanical bias.
Innovation Solution
A delivery system with a mandrel and adapter piece that moves between positions to control the tethering member's connection and release, using a positive-locking mechanism to securely attach and detach the medical device, allowing for controlled release and testing without mechanical bias.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the medical device is fully released from the delivery system, then the device can be tested and repositioned freely, but the device may become difficult to recapture if repositioning is needed
Solution Approach 1:
The tethering member acts as an intermediary element that maintains a controlled connection between the medical device and delivery system during testing. This intermediate tether allows the device to be tested and repositioned freely while still providing a mechanical link for potential recapture, resolving the contradiction between ease of operation and reliability of recapture.
2Ease of operation
If the adapter piece is moved to the second position to release the positive-locking member, then the medical device can be detached, but the delivery system loses its secure holding capability
Solution Approach 1:
The system transitions from a static locked state to a dynamic controllable state. The adapter piece can be moved between positions to dynamically adjust the connection strength - fully locked during delivery, partially connected during testing via the tethering member, and fully released when needed. This dynamic capability resolves the contradiction between ease of detachment and secure holding.
3Ease of operation
If the medical device remains connected to the delivery catheter, then positioning and anchoring are facilitated, but mechanical bias interferes with accurate testing
Solution Approach 1:
The connection between the delivery system and medical device is segmented into two stages: initial strong connection via the adapter piece for positioning and anchoring, followed by a separate tethering member connection for testing. This segmentation allows the device to be firmly positioned during implantation while enabling unbiased testing through the independent tethering mechanism, resolving the contradiction between ease of operation and measurement precision.
Data Source
AI summary
A delivery system for implanting a medical device comprises a delivery catheter having an inner lumen, a mandrel received in the inner lumen of the delivery catheter and movable with respect to the delivery catheter, and an adapter piece connected to the mandrel, wherein the adapter piece, by moving the mandrel with respect to the delivery catheter, is displaceable between a first position in which the adapter piece is received within the inner lumen of the delivery catheter and a second position in which the adapter piece is arranged outside of the inner lumen of the delivery catheter. A tethering member comprises a positive-locking member adjoining a tether portion, wherein the positive-locking member in a connection state is received on the adapter piece, but is releasable from the adapter piece by displacing the adapter piece from the first position towards the second position.