Surgical Instrument Motor Speed Sensing for Precise Stapling Control
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Solution Overview
Problem
Existing surgical instruments lack precise control over motor speed and efficiency, leading to inconsistent performance in stapling and cutting operations.
Innovation Solution
A surgical stapling and cutting instrument equipped with a speed sensor assembly, including a magnetic field sensor and microcontroller, to monitor and control motor speed and position, ensuring precise and reliable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If motor speed control is added to surgical instruments, then precision of stapling and cutting operations is improved, but device complexity increases due to additional sensors and control systems
Solution Approach 1:
The patent implements a speed sensor assembly that provides real-time feedback on motor speed to the control system. This feedback mechanism allows the controller to monitor and adjust motor speed dynamically, ensuring precise control over the surgical instrument's operation while maintaining consistent performance across stapling and cutting actions.
Solution Approach 2:
The patent replaces mechanical speed control mechanisms with electronic control through a microcontroller and speed sensor. This substitution eliminates complex mechanical governors or friction-based controls, achieving precise speed regulation through electronic feedback loops while reducing mechanical wear and improving reliability.
2Stability of the object's composition
If real-time speed monitoring is implemented, then consistency of surgical operations is improved, but loss of time occurs during data processing and control adjustments
Solution Approach 1:
The speed sensor assembly operates continuously throughout surgical instrument operation, providing uninterrupted real-time speed data to the control system. This continuous monitoring ensures consistent surgical performance without interruption, as the system maintains optimal motor speed throughout the entire stapling or cutting operation rather than requiring periodic adjustments.
Solution Approach 2:
The control system automatically processes speed sensor data and adjusts motor parameters without requiring external intervention or complex computational delays. The microcontroller is programmed with algorithms that rapidly process speed feedback and make real-time adjustments, enabling the system to self-regulate motor speed maintaining operational consistency with minimal processing time.
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
Enhances the precision and reliability of surgical procedures by providing real-time feedback and control over motor speed, improving the consistency of stapling and cutting actions.
Implementation Method 1
The speed sensor assembly includes a magnetic field sensor and a magnet. The magnet is positioned to rotate with the motor shaft, and the magnetic field sensor is positioned to detect the magnet's rotation.
Implementation Method 2
EP 2 030 709 A2 describes a power tool comprising a housing, a motor, an output shaft, a gear transmission mechanism, and a control system. US 8 956 342 B1 describes a handheld surgical device with a speed control sensor in the body of the device.
Data Source
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AI summary
Motor speed control systems are disclosed that include a motor having an output shaft, a motor speed control system, a sensor to detect the speed of the motor, and a controller to receive a signal from the sensor and to control the speed of the output shaft. A gear reduction assembly is operably coupled to the output shaft and a detectable element located in the gear reduction assembly. The sensor senses the detectable element. The sensor is placed in the radial path of the detectable element. Another system includes a brushless motor having a housing and an output shaft, the brushless motor comprising electromagnetic field coils arrayed radially around a central magnetic shaft, a gear reduction assembly operably coupled to the output shaft, and a sensor placed in proximity to the brushless motor. The sensor communicates with a controller to control the speed of the output shaft.