High Frequency Surgery Apparatus Arc Intensity Feedback
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Solution Overview
Problem
High frequency surgery apparatuses face challenges in achieving consistent cutting results due to dependency on cutting speed and tissue type, leading to variations in coagulation and carbonization of cut surfaces.
Innovation Solution
A high frequency surgery apparatus that determines a speed parameter from the quotient of DC voltage and harmonic amplitude, allowing automatic adaptation of output values to cutting speed, and uses tissue differentiation parameters to regulate output voltage and power independently of tissue type, ensuring uniform cutting quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the high frequency generator output is increased to improve cutting speed, then the cutting efficiency is improved, but the degree of carbonisation and necrosis of cut surfaces increases
Solution Approach 1:
The system continuously monitors arc intensity by detecting DC voltage in the high frequency circuit and uses this feedback to automatically regulate the generator output. This closed-loop control ensures the output adapts to actual cutting conditions, maintaining optimal power levels that prevent carbonisation while preserving cutting efficiency
Solution Approach 2:
The system dynamically adjusts the high frequency generator output parameters based on detected arc intensity and tissue type. By changing power output levels in response to real-time conditions, the system optimizes the balance between cutting speed and prevention of harmful carbonisation effects
2Manufacturing precision
If the high frequency generator output is increased to achieve better cutting results, then the arc intensity increases, but unwanted tissue damage and necrosis occur
Solution Approach 1:
DC voltage detection provides continuous feedback on arc intensity, enabling the control system to regulate generator output and maintain precise cutting quality while preventing excessive power delivery that would cause tissue damage and necrosis
Solution Approach 2:
The system transitions from static fixed output to dynamic adaptive output that automatically adjusts to changing cutting conditions, tissue types, and arc intensities, optimizing cutting quality while minimizing harmful effects
3Reliability
If arc regulation is implemented to achieve cutting results independent of tissue factors, then the consistency of cutting quality is improved, but the device complexity increases
Solution Approach 1:
By incorporating DC voltage detection and automatic regulation feedback loops, the system achieves reliable and consistent cutting results across different tissue types and cutting conditions, with the added complexity justified by the significant improvement in cutting quality consistency
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 achieves consistent and reproducible cutting results by adapting to cutting speed and tissue type, minimizing necrosis and carbonization, and preventing unwanted tissue damage.
Implementation Method 1
the cutting effect in biological tissue is based on the formation of an arc between an active electrode and the tissue
Implementation Method 2
The point concentration of the high frequency current in the arc gives rise to a flash-like increase in the temperature of the cellular tissue, which leads to abrupt vaporisation of the cell fluid
Implementation Method 3
the tissue surrounding the electrode is heated by the current to such an extent that body-specific albumins break down and stick together
Implementation Method 4
That results in denaturing and shrinkage of the tissue and the blood vessels and thus ultimately stopping of haemorrhages
Data Source
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AI summary
The invention concerns a high frequency surgery apparatus for cutting and/or coagulating biological tissue and methods of operating same. The high frequency surgery apparatus includes at least one high frequency generator which in operation forms a high frequency circuit with the tissue to be treated, with the production of an arc, and at least one measuring and calculating device which is connected for signal transmission to the high frequency circuit and which is adapted in operation to ascertain both a DC voltage in the high frequency circuit and also the amplitudes of at least one even and at least one odd harmonic of a fundamental frequency of the high frequency generator and to form a speed parameter representative of a cutting speed from a quotient of the DC voltage and the amplitude of the harmonic and/or from a quotient of the DC voltage and the output current and to output a speed signal dependent on the speed parameter for subsequent processing