Surgical Stapler Motor Control for Adaptive Tissue-Treatment Motion
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Solution Overview
Problem
Current surgical stapling systems face challenges in precise control and adaptation during tissue treatment motions, particularly in handling varying tissue properties and ensuring consistent staple deployment and cutting performance.
Innovation Solution
The development of a powered surgical stapling system with an interchangeable shaft assembly and end effector, featuring a motor-driven mechanism that includes a firing system with dynamic braking and adaptive control algorithms, allowing for real-time adjustments to motor performance based on tissue properties and sensor feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a motor-driven mechanism is used for tissue treatment, then productivity and precision are improved, but the system becomes more complex and requires precise control during motion
Solution Approach 1:
The system employs feedback control by monitoring motor current draw and comparing it against expected values to detect deviations caused by tissue properties. The controller adjusts motor drive signals in real-time based on this feedback, enabling adaptive control that handles varying tissue characteristics without requiring complex manual intervention.
Solution Approach 2:
The motor control system performs self-adjustment by automatically detecting tissue properties through current monitoring and autonomously modifying drive parameters. This self-service capability eliminates the need for external complex control mechanisms, as the system adapts its own operation based on real-time sensor feedback from the motor's electrical characteristics.
2Manufacturing precision
If dynamic braking and adaptive control are implemented, then manufacturing precision and reliability are improved, but device complexity increases
Solution Approach 1:
The system replaces complex mechanical precision mechanisms with electronic control. Instead of using intricate mechanical braking and positioning systems, the invention uses electronic motor control with dynamic braking capability, where the controller adjusts electrical parameters to achieve precise staple deployment and cutting motions without complex mechanical components.
Solution Approach 2:
The control system achieves precision by dynamically changing electrical parameters such as motor voltage, current, and braking torque based on real-time tissue feedback. This parameter adjustment approach allows the same hardware to adapt its performance characteristics for different tissue types, eliminating the need for multiple specialized mechanical systems.
3Adaptability or versatility
If real-time motor adjustments are made based on sensor feedback, then adaptability is improved, but the system requires more sophisticated control algorithms
Solution Approach 1:
The system uses feedback control by continuously monitoring motor current draw and comparing it against expected values for different tissue types. The controller detects deviations and automatically adjusts drive signals to maintain optimal performance, enabling adaptation to varying tissue properties through a relatively simple current-sensing and comparison algorithm.
Solution Approach 2:
The motor control system performs self-adjustment by automatically detecting tissue properties through current monitoring and autonomously modifying drive parameters. This self-service capability allows the system to adapt to different tissue characteristics without requiring complex external control algorithms or manual intervention, as the adaptation logic is embedded in the basic current-sensing and feedback loop.
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 system enables precise and adaptive tissue treatment by dynamically adjusting motor performance to accommodate varying tissue thickness and properties, ensuring consistent staple deployment and cutting efficiency, thereby improving surgical precision and reducing tissue trauma.
Implementation Method 1
a motor-driven mechanism that includes a firing system with dynamic braking and adaptive control algorithms, allowing for real-time adjustments to motor performance based on tissue properties and sensor feedback
Implementation Method 2
a firing system with dynamic braking and adaptive control algorithms
Data Source
AI summary
Disclosed is a surgical system, comprising an end effector configurable between an open state and a clamped state. The end effector comprises a first jaw and a second jaw moveable relative to the first jaw. The surgical system further comprises a drive system, comprising a motor and a drive assembly movable by the motor to effect a tissue-treatment motion at the end effector. The surgical system further comprises a motor control system comprising motor control electronics. The motor control system is configured to transmit a motor drive signal that causes the motor to move the drive assembly to effect the tissue-treatment motion at the end effector and control the motor control electronics to modify the tissue-treatment motion independent of the motor drive signal.