Staple Cartridge Projections for Reliable Ejection
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Solution Overview
Problem
Current surgical stapling instruments face challenges in efficiently stapling and cutting tissue due to limitations in staple cartridge design, firing mechanism reliability, and battery power management, which can lead to inconsistent performance and increased risk of user error.
Innovation Solution
The development of a surgical stapling system with an interchangeable shaft assembly, advanced staple cartridge design featuring a sled mechanism for staple ejection, and a battery pack with integrated circuitry for power management, ensuring reliable staple firing and tissue cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional staple cartridge design is used, then the structure is simple, but the stapling performance is inconsistent and reliability is poor
Solution Approach 1:
The staple cartridge is divided into multiple functional components including a body, deck, anvil, sled, and staple drivers. Each component performs a specific function: the body houses staples, the deck provides a firing surface, the anvil forms staples, the sled transports staples, and the drivers eject staples. This segmentation allows each part to be optimized for its specific function, improving overall reliability while maintaining manageable complexity through modular design.
Solution Approach 2:
The cartridge incorporates a movable sled that translates from a first position to a second position during the firing cycle. This dynamic element enables controlled staple ejection through interaction with the firing member, providing consistent stapling force and improving performance reliability compared to static cartridge designs.
2Reliability
If projections are added to the staple cartridge, then staple ejection reliability is improved, but manufacturing complexity increases
Solution Approach 1:
Projections are pre-formed on the sled or cartridge body during manufacturing, positioned to engage with corresponding features on the firing member before the actual stapling operation. This preliminary configuration ensures reliable staple ejection without requiring complex assembly steps or post-manufacturing adjustments, balancing manufacturing ease with operational reliability.
3Reliability
If an advanced firing mechanism is implemented, then staple firing reliability is improved, but the device complexity increases
Solution Approach 1:
The sled acts as an intermediary component between the firing member and the staples. The firing member engages the sled, which then translates this engagement into controlled staple ejection through its interaction with staple drivers. This intermediary mechanism provides reliable firing action while simplifying the overall system compared to direct firing mechanisms.
Solution Approach 2:
The firing mechanism is designed to be self-actuating through the translation of the sled. As the sled moves from its first position to its second position, it automatically engages with the firing member and triggers staple ejection without requiring additional actuation mechanisms, reducing overall system complexity while maintaining reliability.
Data Source
AI summary
A staple cartridge comprising a cartridge body comprising a longitudinal slot, a deck surface, and a plurality of staple cavities defined in the cartridge body is disclosed. The cartridge body further comprises a plurality of projections extending from the deck surface. A surface of each projection is flush with one of a proximal end wall and a distal end wall of each staple cavity. The staple cartridge further comprises staples removably stored in the staple cavities.