Surgical Stapler Articulation and Curved Anvil for Precision
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Solution Overview
Problem
Current surgical cutting and stapling instruments face challenges in efficiently and reliably cutting and stapling tissue due to limitations in the design of staple cartridges and the interaction between the stapling mechanism and tissue, leading to inconsistent performance and potential tissue damage.
Innovation Solution
The development of a surgical stapling instrument with a staple cartridge featuring a curved deck surface and projections, along with a firing system that includes a tissue cutting knife, which articulates to ensure precise staple placement and tissue cutting, addressing the limitations of existing instruments by enhancing the stapling and cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional linear stapling mechanism is used, then the device structure is simple, but staple placement precision and tissue cutting accuracy are insufficient
Solution Approach 1:
The patent implements an articulation mechanism that allows the stapling mechanism to rotate or pivot relative to the handle assembly, transforming the rigid linear structure into a dynamic system. This articulation enables the surgeon to adjust the angle of the stapler head to match the curvature of tissue surfaces, thereby achieving precise staple placement while maintaining reasonable structural complexity through controlled degrees of freedom
Solution Approach 2:
The patent incorporates a curved deck surface on the anvil that conforms to the natural curvature of tissue. This curved geometry allows the stapling mechanism to adapt to non-planar tissue surfaces, improving staple placement precision by ensuring uniform contact between the anvil and tissue throughout the stapling process, rather than relying solely on complex mechanical adjustments
2Stability of the object's composition
If increased clamping force is applied to ensure secure tissue grip, then tissue holding stability improves, but tissue damage increases
Solution Approach 1:
The patent employs differential clamping force distribution through specifically designed jaw surfaces with varying compliance characteristics. The anvil and jaw surfaces incorporate localized cushioning elements or compliant materials in contact regions, allowing high clamping force to be applied where needed for secure tissue holding while distributing stress to minimize localized tissue damage. This creates non-uniform force distribution that optimizes both stability and tissue protection
3Manufacturing precision
If a single linear firing stroke is used, then the operation is simple and fast, but consistent staple formation and clean cutting are difficult to achieve
Solution Approach 1:
The patent divides the stapling and cutting functions into distinct sequential phases within the firing mechanism. The firing stroke is segmented into a stapling phase where staples are formed and a cutting phase where the knife separates tissue. This segmentation allows each function to be optimized independently - ensuring consistent staple formation through controlled deformation while achieving clean cuts through a dedicated cutting motion - without requiring excessively complex multi-step operations
Data Source
AI summary
Methods for operating a surgical instrument are disclosed. In various instances, the methods include preventing the operation of the surgical instrument in some capacity if an unspent staple cartridge is not seated in the surgical instrument. Moreover, in various instances, the methods include preventing the operation of the surgical instrument in some capacity if the surgical instrument cannot identify and/or authenticate the staple cartridge seated in the surgical instrument.