Multi-Layer Tissue Thickness Compensator for Surgical Stapling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current surgical stapling instruments face challenges in effectively distributing clamping force and ensuring proper tissue engagement, particularly in varying tissue thicknesses, which can lead to inadequate staple placement and tissue damage.
Innovation Solution
The design incorporates a staple cartridge with a tissue thickness compensator and buttress material that is releasably retained between the staple cartridge and anvil, featuring a surface that contacts the tissue to distribute clamping force and improve staple purchase, while also being bioabsorbable to aid in healing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a single-layer tissue thickness compensator is used, then the structure is simple, but it cannot effectively distribute clamping force across varying tissue thicknesses
Solution Approach 1:
The tissue thickness compensator is divided into multiple layers with different materials and properties. The first layer (proximal to cartridge) and second layer (distal to cartridge) are segmented to provide different functions: the first layer provides initial compression and the second layer maintains sustained clamping force, enabling effective force distribution across varying tissue thicknesses while addressing the limitation of single-layer designs.
Solution Approach 2:
The compensator uses composite material construction with at least two different materials in the first and second layers. This composite structure allows each layer to contribute different mechanical properties, enabling the system to handle varying tissue thicknesses effectively while providing superior clamping force distribution compared to homogeneous single-layer designs.
2Reliability
If clamping force is increased to ensure proper tissue engagement, then staple placement improves, but tissue damage increases
Solution Approach 1:
The multi-layer compensator is positioned between the cartridge and anvil to provide predetermined cushioning and force distribution before stapling occurs. The layers are designed to compress and distribute clamping force evenly across the tissue, preventing localized high-stress points that would cause tissue damage while ensuring reliable staple placement.
Solution Approach 2:
The compensator layers are designed with specific thicknesses, material properties, and compression characteristics that change under load. As the jaw closes, the layers compress in a controlled manner, dynamically adjusting the clamping force distribution to maintain optimal pressure across varying tissue thicknesses without exceeding tissue damage thresholds.
3Strength
If the compensator remains attached to the cartridge, then structural support is maintained, but tissue healing is impeded by foreign material presence
Solution Approach 1:
The compensator is designed to be temporarily attached during the stapling procedure to provide necessary structural support and force distribution, then deliberately released and discarded after use. The release mechanism allows the compensator to be easily detached from the cartridge following stapling, removing the foreign material that could impede tissue healing while maintaining structural integrity during the critical stapling phase.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A staple cartridge assembly includes a stepped staple cartridge deck and an implantable layer, such as a tissue thickness compensator and/or a buttress material, for example, positioned thereon. The layer can include a first portion positioned over a first deck surface of the multi-step staple cartridge and a second portion positioned over a second deck surface of the multi-step staple cartridge. The first portion includes a first tissue-contacting surface and the second portion includes a second tissue-contacting surface, wherein the first tissue-contacting surface is vertically offset from the second tissue-contacting surface.