High-Frequency Surgery Device Dual-Threshold Sealing Control
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Solution Overview
Problem
Conventional high frequency surgery apparatuses face difficulties in performing effective sealing of blood vessels of varying thicknesses due to the limitations of impedance-based control methods, which struggle to maintain consistent sealing performance across different diameters.
Innovation Solution
The high frequency surgery apparatus employs a control method that uses both an output time threshold and an impedance threshold as control parameters to manage the high frequency current output, allowing for seamless sealing of blood vessels across a range of diameters by adjusting the output mode and power settings based on detected impedance and time measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If impedance-based control method is used to stop output when predetermined impedance is reached, then sealing of blood vessels can be performed, but it becomes difficult to perform surgery on blood vessels of different thicknesses
Solution Approach 1:
The patent applies parameter changes by introducing multiple control parameters (output time threshold and impedance threshold) instead of relying solely on impedance threshold. The control section dynamically adjusts the high frequency current output based on both the elapsed output time and the detected impedance value, allowing adaptation to different blood vessel thicknesses through parameter optimization
Solution Approach 2:
The patent implements dynamics by making the control parameters adaptive rather than fixed. The control section continuously monitors both output time and impedance, dynamically adjusting the sealing process based on real-time feedback from the living tissue characteristics, enabling the system to adapt to varying blood vessel properties during surgery
2Reliability
If single impedance threshold control is used, then control simplicity is maintained, but sealing performance varies for different blood vessel diameters
Solution Approach 1:
The patent implements feedback control by continuously monitoring both output time and impedance values, and using this feedback to adjust the high frequency current output. The control section compares real-time measurements against predetermined thresholds and automatically adjusts the sealing process, ensuring consistent sealing performance while reducing operator burden through automated control
Solution Approach 2:
The patent adds another dimension to the control system by introducing output time as an additional control parameter alongside impedance. This transforms the control from a single-dimensional (impedance-only) approach to a two-dimensional control space (time and impedance), enabling more reliable sealing performance across different blood vessel diameters
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 approach enables efficient and consistent sealing of blood vessels from small to large diameters, reducing surgery time and alleviating operator burden by optimizing sealing performance through precise control of high frequency current delivery.
Implementation Method 1
a high frequency current generation section (31) that generates a high frequency current to be supplied to a living tissue
Implementation Method 2
an impedance detection section (37) that measures an electric impedance of the living tissue
Implementation Method 3
passes a high frequency current through the blood vessel which is being grasped with an appropriate grasping force and seals the blood vessel using thermal energy thereby generated
Data Source
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AI summary
A high frequency surgery apparatus includes a high frequency current generation section that generates a high frequency current to be transmitted to a living tissue to be operated on, a high frequency probe that transmits the high frequency current to the living tissue to perform treatment with the high frequency current, a time measuring section that measures an output time of the high frequency current, an impedance detection section that detects an electric impedance of the living tissue and an output control section that performs control so as to stop the output of the high frequency current upon detecting that the output time exceeds a first threshold and detecting that the electric impedance value exceeds a second threshold.