Surgical Stapler Cartridge Lockout for Incompatible Reloads
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Solution Overview
Problem
Inadvertent use of incompatible staple cartridges in surgical staplers can result in improperly formed staples, leading to ineffective sealing of patient tissue due to structural incompatibility between the cartridge and the stapler.
Innovation Solution
Incorporation of compatibility lugs and recesses in the cartridge jaw to prevent full seating of incompatible staple cartridges, and a firing lockout mechanism to inhibit the deployment of staples when an incompatible cartridge is loaded, ensuring proper cartridge-stapler compatibility and preventing improper firing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If structural similarity between compatible and incompatible staple cartridges is reduced to prevent inadvertent misuse, then reliability improves, but ease of operation deteriorates due to increased difficulty in identifying the correct cartridge
Solution Approach 1:
The patent applies color coding to compatibility indicators on the staple cartridge and corresponding indicators on the surgical stapler. Compatible cartridges display a first color (e.g., green) while incompatible cartridges display a second color (e.g., red), providing immediate visual identification to prevent inadvertent misuse while maintaining ease of cartridge selection.
Solution Approach 2:
The patent modifies physical parameters of the staple cartridge structure, specifically adding compatibility indicators and modifying the cartridge interface geometry. These parameter changes enable the system to distinguish between compatible and incompatible cartridges through visual and mechanical means, improving reliability without complicating the loading process.
2Reliability
If compatibility verification features are added to the surgical stapler, then reliability improves, but device complexity increases
Solution Approach 1:
The patent introduces a compatibility indicator mechanism that acts as an intermediary between the staple cartridge and the surgical stapler. This indicator system mediates the compatibility verification by providing visual feedback without requiring complex electronic sensors, processors, or active verification systems, thereby maintaining relatively simple device architecture.
Solution Approach 2:
The compatibility verification system is designed to be self-service, where the compatibility indicators on both the cartridge and stapler automatically align or misalign based on compatibility. The system verifies compatibility passively through the physical arrangement of indicators rather than requiring active scanning, sensing, or computational verification, thus avoiding added complexity.
Data Source
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AI summary
A surgical stapler kit includes a surgical stapler having a body, a shaft, and an end effector. The kit includes a first staple cartridge having a first cartridge body and a first sled, and a second staple cartridge having a second cartridge body and a second sled. When the first staple cartridge is at least partially seated within a cartridge jaw with the first sled in a proximal undisplaced position, a knife drives the first sled distally to deploy staples from the first cartridge body. When the second staple cartridge is at least partially seated within the cartridge jaw with the second sled in a proximal undisplaced position, the knife advances distally into a lockout position before causing any staples to be deployed from the second cartridge body.