Hernia Patch Hoisting Frame and Tether System
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Solution Overview
Problem
Existing hernia repair patches face challenges in being delivered through narrow cannulas due to their larger size, and require complex mechanisms for expanding and securing to the tissue wall post-deployment.
Innovation Solution
A prosthesis with a patch body and a hoisting frame, featuring a self-expanding support member and a tether system, allows for minimally invasive delivery and expansion, with the hoisting frame being releasable post-deployment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the patch is made large enough to cover the hernia defect, then the repair effectiveness is improved, but the difficulty of delivery through narrow cannula increases
Solution Approach 1:
The patch is divided into multiple struts or arms that can be independently collapsed along with the resilient support member. This segmentation allows the large patch to be broken down into smaller components that can pass through narrow cannula, then reassemble at the deployment site to form the complete repair structure.
Solution Approach 2:
The patch is nested within or around the resilient support member in a collapsed configuration, similar to nested dolls. The struts are positioned within the confines of the support member, allowing the entire assembly to be compressed into a small delivery profile while maintaining the capability to expand to full size at the target site.
2Ease of operation
If a resilient support member is added to enable self-expansion, then the deployment simplicity is improved, but the device complexity increases
Solution Approach 1:
The resilient support member undergoes a parameter change in its structural configuration, transitioning from a compressed state during delivery to an expanded state at the deployment site. This elastic deformation allows the support member to self-expand without requiring additional actuators or complex mechanisms, maintaining simplicity while enabling functional transformation.
3Ease of operation
If the hoisting frame is made releasable for easy removal, then the ease of operation is improved, but the reliability of fixation during deployment may worsen
Solution Approach 1:
The hoisting frame is designed with pre-configured release mechanisms that are activated only after the patch has been properly deployed and positioned. This preliminary action ensures that the frame maintains strong fixation during the critical deployment phase, then allows for controlled removal once the repair is established, balancing reliability with ease of removal.
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
Enables efficient delivery and secure fixation of the hernia repair patch through narrow incisions, facilitating easy expansion and secure attachment to the tissue wall without requiring additional tools for frame removal.
Implementation Method 1
A self-expanding support member assists in unfurling the patch body from the reduced configuration to an expanded configuration
Implementation Method 2
A pulling force on the free end of the tether in an outward direction away from the patch body is directed by the translation component in the direction of a first pair of spaced apart locations
Data Source
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Figure 3~5
AI summary
A prosthesis for repairing a hernia defect includes a patch body, a hoisting frame releasably attachable to the patch body, and a tether attached to the hoisting frame and having a free end extendable through the thickness of the patch body and accessible from the side of the patch body opposite to the side where the hoisting frame is releasably attached. The patch body and/or the hoisting frame includes a self-expanding support member. The hoisting frame includes a frame body and a translation component for directing pulling forces on the tether to the frame body.