Surgical Stapler Lockout Deactivator Mechanism

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Surgical stapling devices often face issues with lockout mechanisms that prevent the firing of incompatible or spent staple cartridges, leading to operational inefficiencies and potential tissue damage.

Innovation Solution

The implementation of a retainer with an authentication key that interacts with the lockout spring mechanism, allowing only compatible staple cartridges to unlock the firing mechanism, ensuring proper cartridge alignment and preventing accidental firing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a lockout mechanism is implemented to prevent firing of incompatible cartridges, then safety and reliability are improved, but device complexity increases

Engineering Contradiction:

ImprovesafetyVSAvoiddevice complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The authentication system is divided into separate components: an authentication feature on the cartridge and a corresponding authentication mechanism in the stapling device. This segmentation allows the lockout function to be added without redesigning the entire system, thereby improving safety while minimizing the increase in overall device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The authentication feature is pre-configured on the cartridge during manufacturing, and the authentication mechanism is pre-built into the stapling device. This preliminary preparation ensures that compatibility verification occurs automatically before firing, improving reliability without requiring complex real-time decision-making mechanisms.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If an authentication key mechanism is added to verify cartridge compatibility, then cartridge alignment and proper operation are ensured, but ease of operation deteriorates

Engineering Contradiction:

Improvecartridge operation reliabilityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The authentication mechanism operates automatically without requiring manual verification by the surgeon. When a cartridge is installed, the authentication feature on the cartridge automatically engages with the authentication mechanism in the stapling device, verifying compatibility and enabling or disabling the firing mechanism accordingly. This self-verifying system ensures reliable cartridge operation while maintaining ease of use, as the surgeon simply needs to install the cartridge without performing additional authentication steps.

Inventive Principle:

Principle #25Self-service

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution ensures that only authorized staple cartridges can be fired, preventing tissue damage and improving the reliability of surgical stapling procedures by ensuring compatibility and proper cartridge operation.

Implementation Method 1

a lockout spring mechanism

Methodology Applied

Scientific EffectSpring mechanism: Spring

Data Source

PatentUS11751872B2Insertable deactivator element for surgical stapler lockouts

Publication Date: 2023.09.12 CILAG GMBH INTERNATIONAL

AI summary

A surgical stapling assembly that comprises a stapling device is disclosed. The stapling device includes an authentication lockout that is movable between a locked position wherein the stapling device is inoperable and an unlocked position wherein the stapling device is operable. The assembly further includes a deactivator tool that includes a deactivation key that is configured to move the authentication lockout into the unlocked position prior to seating a staple cartridge into the device.