Seating Cam Staple Cartridge for Consistent Staple Alignment
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Solution Overview
Problem
Existing surgical cutting and stapling instruments face challenges in efficiently cutting and stapling tissue due to issues with jaw closure systems, staple firing mechanisms, and staple cartridge design, leading to inconsistent performance and potential tissue damage.
Innovation Solution
The development of a staple cartridge with a seating cam mechanism that enhances the interaction between the staple drivers and the firing member, incorporating driver retention features and a curved deck surface with projections, improves the stability and alignment of staples during the firing process, ensuring consistent tissue cutting and stapling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional staple cartridge design is used, then the structure is simple, but the stability and alignment of staples during firing is insufficient
Solution Approach 1:
The seating cam is pre-configured on the cartridge to automatically perform the alignment action during the firing sequence. The cam's geometry is designed so that as the firing member moves distally, the cam surface contacts the driver retention feature and automatically positions the staple driver in the correct orientation, eliminating the need for complex active alignment mechanisms while ensuring consistent staple alignment.
Solution Approach 2:
The seating cam acts as an intermediary element between the firing member and the staple driver. It transfers the motion from the firing member to the driver retention feature, using the cam's rotational movement to convert linear motion into the precise positioning action needed for staple alignment, thereby achieving stable staple placement without direct complex interaction between the firing member and driver.
2Reliability
If the jaw closure system and staple firing mechanism are improved, then cutting and stapling performance is enhanced, but the device complexity increases
Solution Approach 1:
The seating cam mechanism is designed to automatically perform the alignment function using the inherent motion of the firing member itself. As the firing member travels distally during the firing stroke, the cam surface automatically engages with the driver retention feature and performs the alignment action without requiring separate actuators or complex control systems, thereby enhancing reliability while minimizing added complexity.
3Manufacturing precision
If driver retention features and seating cam are added, then staple alignment is improved, but the manufacturing complexity increases
Solution Approach 1:
The seating cam and driver retention feature are integrated into the cartridge structure as a unified assembly. The cam is formed as a single piece with the cartridge body, and the driver retention feature is incorporated into the same structure, allowing both alignment functions to be achieved through a single integrated component rather than separate parts, thereby reducing assembly steps and maintaining manufacturing feasibility while achieving precise staple alignment.
Data Source
AI summary
A replaceable staple cartridge is disclosed which is seatable in a jaw of a surgical stapling instrument. If the staple cartridge is not fully seated in the jaw, the closure of the surgical stapling instrument will fully seat the staple cartridge.