Tissue Thickness Compensator for Surgical Stapler
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Solution Overview
Problem
Current surgical stapling and cutting instruments face challenges in effectively compensating for tissue thickness variations, leading to inconsistent staple formation and increased tissue trauma during stapling and cutting procedures.
Innovation Solution
The implementation of a tissue thickness compensator with a compressible portion and clearance apertures within the staple cartridge, which allows staples to move through these apertures during firing, reducing friction and facilitating consistent staple deployment and tissue cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a tissue thickness compensator is implemented to accommodate varying tissue thicknesses, then staple formation consistency is improved, but device complexity increases
Solution Approach 1:
The tissue thickness compensator is divided into multiple layers including a first layer and a second layer with different material properties and functions. The first layer provides compressibility to accommodate tissue thickness variations, while the second layer provides structural support and defines clearance apertures. This segmentation allows each layer to be optimized for its specific function, improving staple formation consistency without requiring complete redesign of the entire stapling device.
Solution Approach 2:
The multi-layer compensator structure nests functional elements within each other, where the first compressible layer is positioned within or alongside the second structural layer. This nested arrangement allows the compensator to accommodate tissue thickness variations while maintaining a compact overall structure that integrates into the existing stapler cartridge design, thus improving consistency without proportionally increasing device complexity.
2Productivity
If clearance apertures are introduced within the staple cartridge to reduce friction, then staple deployment efficiency is improved, but device complexity increases
Solution Approach 1:
Clearance apertures are strategically positioned at specific locations within the staple cartridge where friction between staples and the cartridge walls is most significant during deployment. These localized openings provide clearance only where needed, reducing friction and improving staple deployment efficiency without requiring modifications throughout the entire cartridge structure, thus minimizing the increase in device complexity.
3Object-affected harmful factors
If a multi-layer compressible structure is used to compensate for tissue thickness variations, then tissue trauma is reduced, but manufacturing complexity increases
Solution Approach 1:
The tissue thickness compensator utilizes composite material construction with a first layer made of compressible material (such as foam or gel) and a second layer made of more rigid material (such as plastic or metal). This composite structure allows the compressible layer to conform to and cushion varying tissue thicknesses, reducing tissue trauma, while the rigid layer provides structural integrity. The layered composite approach enables manufacturing through standard techniques like lamination or co-molding, balancing improved tissue protection with reasonable manufacturing complexity.
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
This solution enhances staple formation consistency, reduces tissue trauma, and improves the efficiency of stapling and cutting processes by accommodating varying tissue thicknesses and minimizing frictional forces.
Implementation Method 1
a compressible portion and clearance apertures within the staple cartridge, which allows staples to move through these apertures during firing, reducing friction
Data Source
AI summary
A staple cartridge assembly for use with a surgical instrument is disclosed. The staple cartridge assembly comprises a staple cartridge and a compressible tissue thickness compensator. The staple cartridge defines a longitudinal axis. The staple cartridge comprises a cartridge body and a plurality of staples stored in the cartridge body. The compressible tissue thickness compensator comprises a deck-facing side, a tissue-facing side, a first portion, and a second portion. The second portion comprises a curved depression on the tissue-facing side of the compressible tissue thickness compensator. The curved depression partially extends through the second portion of the compressible tissue thickness compensator. The curved depression is transverse to the longitudinal axis defined by the staple cartridge.