Surgical Stapler Motor Current Feedback for Consistent Firing Force
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Solution Overview
Problem
Current surgical staplers lack efficient motor control mechanisms, leading to inconsistent tissue stapling and cutting performance due to variations in tissue types and conditions, which can result in suboptimal surgical outcomes.
Innovation Solution
The surgical stapler employs a motor control system that utilizes electrical parameters, such as motor current, to optimize staple formation and tissue cutting by adjusting the firing mechanism based on real-time tissue feedback, ensuring consistent and precise stapling and cutting across different tissue types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional motor control mechanisms are used in surgical staplers, then the device structure remains simple, but tissue stapling and cutting performance becomes inconsistent due to variations in tissue types and conditions
Solution Approach 1:
The motor control system monitors electrical parameters (current, voltage, power) during motor operation and uses this feedback to dynamically adjust motor control signals. This closed-loop feedback mechanism enables the system to adapt to varying tissue conditions in real-time, ensuring consistent stapling and cutting performance across different tissue types while managing device complexity through intelligent control algorithms.
Solution Approach 2:
The system dynamically changes motor operating parameters (current, voltage, power) based on real-time monitoring and tissue conditions. By adjusting these electrical parameters during operation, the motor control system optimizes performance for different tissue types and surgical stages, resolving the contradiction between reliability and device complexity through adaptive parameter management.
2Manufacturing precision
If motor control is adjusted based on real-time electrical parameters, then precision and reliability of stapling and cutting improve, but the control system complexity increases
Solution Approach 1:
The control system continuously monitors electrical parameters (current, voltage, power) during motor operation and uses this feedback to dynamically adjust motor control signals. This closed-loop feedback mechanism enables precise control of staple formation and tissue cutting by adapting to real-time tissue conditions, achieving high manufacturing precision while managing control system complexity through efficient feedback processing.
Solution Approach 2:
The system replaces traditional mechanical control mechanisms with electrical parameter-based motor control. By using electrical signals and parameter monitoring instead of purely mechanical control, the system achieves higher precision in staple formation and tissue cutting while reducing overall device complexity through electronic control systems that offer more precise and adaptable control.
3Reliability
If the motor control system adapts to varying tissue conditions, then surgical outcomes improve, but the extent of automation increases
Solution Approach 1:
The motor control system performs self-adjustment by automatically monitoring electrical parameters and adapting motor control signals based on real-time tissue conditions. This self-service capability enables the system to maintain consistent surgical outcomes across different tissue types without requiring constant manual intervention, improving reliability while managing automation extent through intelligent self-regulation.
Solution Approach 2:
The system automatically changes motor operating parameters (current, voltage, power) based on real-time monitoring of tissue conditions. This adaptive parameter management enables consistent surgical outcomes across varying tissue types while managing automation complexity through algorithmic control that automatically adjusts to different surgical scenarios without requiring excessive automation infrastructure.
Data Source
AI summary
A surgical stapler. The surgical stapler includes a drive system, an electric motor, a battery and a control system. The electric motor is mechanically coupled to the drive system. The battery is electrically couplable to the electric motor. The control system is electrically connected to the electric motor and includes an H-bridge circuit, an electrically resistive element and an electrically inductive element. The H-bridge circuit includes a high side and a low side. The low side of the H-bridge circuit includes first and second switching devices. The electrically resistive element is electrically connected in series with the first switching device. The electrically inductive element is electrically connected to the electrically resistive element. The control system is configured to control a force applied to the drive system based on a current downstream of the electrically resistive element.