Prosthesis Connecting Device Eyelet Engagement
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Solution Overview
Problem
Current stent holder designs face difficulties in engaging and maintaining multiple eyelets during the loading procedure, leading to potential disengagement and damage to the catheter components, which complicates the loading and deployment of heart valve prostheses in minimally invasive procedures.
Innovation Solution
A connecting device with receiving means and accelerating means, such as a leaf spring, facilitates the stepwise engagement of eyelets into receiving means, preventing disengagement by using an outer shaft to cover and secure the eyelets, allowing for controlled crimping and deployment of self-expanding stents or prostheses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple eyelets are engaged with the stent holder during the loading procedure, then the prosthesis can be securely connected to the delivery system, but the difficulty of maintaining them in position while advancing the catheter shaft increases
Solution Approach 1:
The eyelets are pre-positioned in recesses of the stent holder before the catheter shaft is advanced. This preliminary positioning allows the shaft to be advanced without manually maintaining each eyelet's position, as they are already secured in their recesses. The recesses provide pre-formed receiving spaces that guide and hold the eyelets during the loading process.
2Reliability
If the catheter shaft is advanced over the stent holder to secure eyelets, then the eyelets are held in position, but the risk of damage to the outer shaft increases
Solution Approach 1:
The recesses in the stent holder act as protective structures that cushion and protect the eyelets during the advancing of the catheter shaft. These recesses provide a controlled environment where the eyelets are held securely without being exposed to external forces that could damage the shaft or cause disengagement. The recesses absorb and distribute the forces during the loading process.
3Reliability
If three or more eyelets are introduced into receiving means of the catheter and capsule, then the prosthesis can be connected to the delivery system, but the risk of widening and changing dimensions of the shaft increases
Solution Approach 1:
The eyelets are pre-positioned in the recesses of the stent holder before the catheter shaft is advanced over them. This preliminary arrangement ensures that the eyelets are already in their final positions when the shaft is advanced, eliminating the need for manual manipulation and bending of the shaft during the loading process. The shaft simply advances over the pre-positioned eyelets without needing to bend or twist to accommodate them.
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 solution simplifies the loading procedure, reduces the risk of component damage, and ensures secure engagement of the stent or prosthesis with the delivery system, enhancing the reliability and safety of minimally invasive heart valve replacement procedures.
Implementation Method 1
at least one means for accelerating the introduction of the connecting means into the receiving means, such as a leaf spring
Data Source
AI summary
The invention relates to a connector device and a method for loading a prosthesis onto a delivery system as well as a method for delivery of the prosthesis and optionally retrieval of the prosthesis.