Intravascular Delivery Device Locking Unit for Medical Implants
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Solution Overview
Problem
Existing medical implant delivery systems face challenges such as unintended release, limited flexibility, and increased patient risk due to threaded attachments, which can lead to embolies and material fatigue, especially in anatomically difficult areas like the heart.
Innovation Solution
A flexible intravascular delivery device with a locking unit that allows for pivoting and tilting of the medical implant up to 45 degrees without stress, ensuring secure attachment and controlled release, featuring a connection interface with a locking wire and a resiliently flexible unit for enhanced security and maneuverability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If threaded attachment is used to connect implant to delivery wire, then attachment can be made, but unintended release may occur and patient safety is reduced
Solution Approach 1:
The patent replaces the threaded mechanical attachment system with a bonding system using adhesive or welding. The implant is bonded to the delivery wire or introduction implement through chemical bonding (adhesive) or thermal/electrical bonding (welding), eliminating the mechanical threading mechanism that could loosen and cause unintended release.
Solution Approach 2:
The patent changes the bonding parameters by using materials and methods (adhesive types, welding parameters) optimized for the specific implant material and delivery system. This ensures strong, reliable bonding that prevents unintended release while accommodating different implant materials and delivery requirements.
2Ease of operation
If threaded attachment is used, then implant can be delivered, but implant may be subject to bending and material fatigue
Solution Approach 1:
The patent replaces the threaded mechanical connection with a bonded connection that provides a more flexible and continuous load path. This eliminates the rigid threaded interface that creates stress concentration points and bending moments, thereby reducing material fatigue and improving strength.
3Ease of operation
If threaded attachment is used, then implant can be attached to delivery wire, but force at release may have negative impact on surrounding tissue
Solution Approach 1:
The patent replaces the mechanical threading system with a bonding system that allows for more controlled release. The bonded connection can be designed to fail in a controlled manner or be released through a controlled mechanism, distributing forces more evenly and reducing concentrated force impacts on surrounding tissue during release.
4Reliability
If threaded attachment is used, then implant can be connected to delivery system, but surgery time and costs increase
Solution Approach 1:
The patent applies preliminary action by pre-coating the delivery wire or introduction implement with adhesive before implant insertion, or by designing the bonding interface to be prepared in advance. This eliminates the need for threading operations during surgery, reducing surgical time while maintaining reliable attachment through the bonded connection.
Solution Approach 2:
The patent replaces the time-consuming threaded attachment process with a faster bonding method. The adhesive bonding or welding process can be performed more quickly than threading and securing the implant, thereby reducing overall surgical time while achieving reliable attachment.
Data Source
AI summary
An intravascular delivery device is disclosed comprising a delivery wire having a proximal and a distal end and an interior lumen extending there between and wherein said distal end comprises a connection interface adapted to matingly interlock with a proximal end portion of a medical implantable device, wherein said delivery device comprises a locking unit arranged to secure said connection interface in a locking position in which said medical implant is pivotably locked before a controlled release.