Rotatable High-Frequency Electrode Drive Unit for Medical Resectors
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Solution Overview
Problem
Conventional medical resectors with rotatable high-frequency electrodes require complex and costly setups involving standard engines and reduction gears, leading to increased operational complexity, maintenance, and sterilization challenges, while offering insufficient control and quality in tissue ablation and coagulation.
Innovation Solution
A compact drive unit that integrates an engine and reduction gear to provide a rotation frequency range of 10-200 rpm for the high-frequency electrode, allowing for direct coupling without additional mechanical interfaces, reducing the need for separate components and simplifying handling, maintenance, and enhancing control over tissue ablation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If standard engines with reduction gears are used to drive the high-frequency electrode, then the electrode can achieve the required rotation frequency, but the device complexity and operational difficulty increase
Solution Approach 1:
The patent combines the engine and reduction gear into a single integrated drive unit that couples directly to the high-frequency electrode. This merging eliminates the need for separate mechanical interfaces and multiple coupling components, thereby reducing device complexity while maintaining the required rotation frequency output.
2Speed
If standard engines with reduction gears are used, then the electrode can achieve the required rotation frequency, but maintenance complexity and sterilization difficulty increase
Solution Approach 1:
By integrating the engine and reduction gear into a single compact drive unit with direct coupling to the electrode, the patent reduces the number of separate components that require maintenance and sterilization. This merged structure simplifies cleaning procedures and reduces the time required for maintenance operations.
3Productivity
If high rotation frequency is provided by standard engines, then cutting speed increases, but control quality and observability of tissue ablation deteriorate
Solution Approach 1:
The patent employs a reduction gear mechanism that transforms the high rotation frequency output of the engine into an optimized rotation frequency range (10-200 rpm) for the high-frequency electrode. This parameter transformation enables balanced cutting quality and observability by reducing the rotation speed to a level where tissue ablation can be effectively controlled and observed.
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
The solution provides improved operational simplicity, reduced maintenance complexity, and optimal ablation capacity and control, with rotation frequencies between 30-60 rpm offering balanced cutting quality and observability, reducing fatigue for medical personnel and improving patient safety.
Implementation Method 1
an electrode supplied with high-frequency electric current is used for cutting tissue
Implementation Method 2
an engine device for generating a rotation movement
Data Source
AI summary
A drive unit for a rotatable high-frequency electrode of a medical resector for cutting, ablating, or coagulating human or animal tissue includes an engine device for generating a rotation movement and a coupling device for transmitting the rotation movement generated by the engine device to an axis coupled with the rotatable high-frequency electrode when the drive unit is coupled with the medical resector. The drive unit is configured to provide on the coupling device a rotation frequency in a range from 10 rpm to 200 rpm.