Non-deforming Surgical Fastener with Central Pad
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Solution Overview
Problem
Conventional surgical fasteners often deform during deployment, applying excessive pressure on tissues and prosthetics, which can lead to tissue damage and reduced holding strength, while non-deforming fasteners struggle to achieve adequate retention forces without deforming.
Innovation Solution
A non-deforming surgical fastener design featuring a widened backspan with a central pad and strategically placed barbs, which applies reduced pressure and increased holding strength by distributing force over a larger area, maintaining the open position after deployment and utilizing materials like stainless steel or bioabsorbable polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional surgical fasteners deform during deployment, then retention forces are achieved, but excessive pressure is applied on tissues and prosthetics causing tissue damage
Solution Approach 1:
The fastener is segmented into distinct functional components: legs for anchoring, a backspan for distribution, and a central pad for pressure management. This segmentation allows each component to perform its specific function optimally without compromising other aspects.
Solution Approach 2:
The patent introduces a third dimension by adding a central pad with thickness greater than the backspan thickness, creating a three-dimensional structure that distributes force over a larger volume and surface area, thereby reducing pressure on underlying tissues.
2Object-affected harmful factors
If non-deforming fasteners are used, then tissue damage is reduced, but adequate retention forces cannot be achieved
Solution Approach 1:
Different parts of the fastener have different properties: the legs are designed for penetration and anchoring, the backspan for force distribution, and the central pad for pressure management. This local differentiation allows the fastener to achieve retention without excessive pressure.
Solution Approach 2:
The fastener employs composite structural design combining multiple materials with different properties (stainless steel or bioabsorbable polymers) to achieve both structural integrity for retention and compliance for reduced pressure application.
3Strength
If pressure is increased to enhance retention, then holding strength improves, but tissue damage increases
Solution Approach 1:
The backspan serves multiple functions: it connects the legs, distributes the closing force, and supports the central pad. This multi-functionality allows the structure to achieve retention forces while simultaneously managing pressure distribution.
Solution Approach 2:
By transitioning from a two-dimensional fastener design to a three-dimensional structure with a raised central pad, the patent increases the surface area and volume over which forces are distributed, thereby reducing pressure (force per unit area) on underlying tissues while maintaining retention strength.
Data Source
AI summary
Various embodiments of a non-deforming surgical fastener are discussed. In one embodiment, the fastener includes two legs and a backspan extending between the two legs. The fastener also includes a backspan thickness that is adapted to reduce the pressure and/or increase the holding strength applied to underlying materials. The non-deforming fastener is constructed and arranged to retain substantially the same shape before, during and after deployment into the target implantation site.