Implantable Layer Porosity for Tissue Integration
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Solution Overview
Problem
Current surgical stapling instruments face challenges in promoting tissue ingrowth and healing, as existing implantable layers often have insufficient porosity and surface features to facilitate tissue integration, leading to potential rejection and prolonged healing times.
Innovation Solution
The development of implantable layers with integrated tissue ingrowth passages and surface treatments, such as porous structures and fibrous layers, which are designed to promote cell adhesion and tissue integration, and the use of foam fragments fused together under heat and pressure to create a supportive environment for tissue growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing implantable layers are used in surgical stapling instruments, then the basic stapling function is achieved, but tissue ingrowth and healing are insufficient due to inadequate porosity and surface features
Solution Approach 1:
The implantable layer incorporates a porous structure with controlled pore sizes and distributions to facilitate tissue ingrowth and vascularization. The porosity allows cells and nutrients to penetrate through the layer, promoting integration with surrounding tissue while maintaining structural integrity for stapling function.
Solution Approach 2:
The implantable layer features non-uniform surface properties with different regions having varying porosity, pore sizes, and surface roughness to optimize different functions in different locations. This includes areas with higher porosity for tissue ingrowth and areas with specific surface features for cell adhesion, resolving the contradiction between basic function and enhanced tissue integration.
2Reliability
If implantable layers with enhanced porosity and surface features are created to promote tissue ingrowth, then tissue integration improves, but the manufacturing process becomes more complex
Solution Approach 1:
The manufacturing process utilizes controllable parameters such as porosity levels, pore size distributions, and surface roughness to achieve desired tissue integration properties. By adjusting these parameters during fabrication, the layer can be optimized for tissue ingrowth while maintaining manufacturability through established processes like foam fabrication or sintering.
Solution Approach 2:
The implantable layer is constructed as a composite structure combining different materials or phases with complementary properties, such as a porous matrix with embedded surface features or layered compositions. This approach enables simultaneous achievement of structural integrity for stapling and enhanced porosity for tissue integration without requiring entirely new manufacturing methods.
3Reliability
If foam fragments are fused together under heat and pressure to create implantable layers, then a supportive environment for tissue growth is provided, but additional manufacturing steps are required
Solution Approach 1:
Foam fragments with pre-defined porosity and surface characteristics are prepared before fusion to ensure they provide the desired tissue growth environment. This preliminary preparation allows control over the final layer's properties while using a standardized fusion process, reducing overall manufacturing complexity despite the additional step.
Solution Approach 2:
The foam fragment fusion process creates implantable layers that replicate the beneficial properties of natural extracellular matrix structures, providing a supportive environment for tissue growth. By using foam fragments as building blocks, the process simplifies the creation of complex porous structures compared to direct fabrication methods.
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
These enhanced implantable layers facilitate faster tissue integration, reduce the risk of rejection, and accelerate the healing process by providing a conducive environment for tissue growth and vascularization, thereby improving surgical outcomes.
Implementation Method 1
foam fragments fused together under heat and pressure to create a supportive environment for tissue growth
Implementation Method 2
porous structures and fibrous layers, which are designed to promote cell adhesion and tissue integration
Data Source
AI summary
A staple cartridge is disclosed. The staple cartridge can include a cartridge body, a plurality of staples, and an implantable layer. The implantable layer can include a piece of lyophilized foam and a plurality of fibers at least partially embedded in the piece of lyophilized foam. The implantable layer can further include a plurality of pores defined in piece of lyophilized foam, and a plurality of pockets, wherein a pocket at least partially surrounds a fiber. A method of forming an implantable layer for use with a surgical staple is also disclosed. The method can comprise obtaining a mold comprising a cavity, placing a plurality of fibers in the cavity of the mold, dispensing a solution into the cavity around the fibers, and lyophilizing the solution in the cavity.