High-Frequency Generator Adaptive Pulse Control
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Solution Overview
Problem
Existing high-frequency generators for electrosurgical instruments face challenges in accurately controlling electrical output power, leading to inefficient energy use and potential uncontrollable energy input into tissues due to fixed pulse durations and pause intervals, which can exceed permissible energy limits.
Innovation Solution
A high-frequency generator with a power controller that dynamically adjusts pulse durations and pauses based on a moving energy balance calculation, ensuring that the output energy balance does not exceed a specified limit, allowing for flexible control of electrical output power and reducing the risk of excessive energy input into tissues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If fixed pulse durations and pause intervals are used, then the generator can deliver high ignition power for plasma creation, but the average power may exceed permissible limits and energy use becomes inefficient
Solution Approach 1:
The patent applies dynamics by replacing fixed pulse durations with dynamic, adaptive pulse widths that automatically adjust based on real-time plasma detection. The control unit monitors plasma presence and modifies pulse parameters accordingly, allowing the system to extend pulse duration when plasma is detected (improving ignition efficiency) while reducing or pausing power delivery when plasma is absent (preventing excessive energy consumption and averaging above safety limits).
Solution Approach 2:
The patent implements feedback through a control unit that continuously monitors plasma generation status and uses this information to regulate pulse output. The system detects plasma presence and provides feedback signals to adjust pulse width, duration, and power delivery in real-time, creating a closed-loop control system that optimizes energy efficiency while maintaining safety compliance.
2Reliability
If fixed pause intervals are used, then the generator can ensure permissible average power limits are not exceeded, but energy reserves are not fully utilized and cutting performance is reduced
Solution Approach 1:
The patent applies dynamics by replacing fixed pause intervals with adaptive pause durations that dynamically adjust based on plasma detection status. When plasma is detected, the system extends the active pulse duration and reduces pause time to maximize cutting performance. When plasma is not detected, the system implements longer pauses or power reduction to maintain compliance with permissible average power limits, thus balancing productivity with safety.
Solution Approach 2:
The patent changes the parameter of pause duration from a fixed value to a variable parameter that adapts to real-time plasma conditions. The control unit modifies pause length based on plasma presence detection, extending operational time when plasma is present (improving cutting performance) and reducing operational time when plasma is absent (maintaining power compliance), thereby optimizing both productivity and safety.
3Device complexity
If fixed pulse durations are used, then the control system is simple, but the system cannot adapt to different plasma conditions and may end delivery prematurely
Solution Approach 1:
The patent implements feedback through a control unit that continuously monitors plasma generation status and uses this information to regulate pulse output. The system detects plasma presence and provides feedback signals to adjust pulse width, duration, and power delivery in real-time, creating a closed-loop control system that optimizes energy efficiency while maintaining safety compliance.
4Reliability
If repeated switching between ignition power and cutting power occurs, then the system can maintain plasma generation, but uncontrollable energy input into tissue may occur
Solution Approach 1:
The patent implements feedback through a control unit that continuously monitors plasma generation status and uses this information to regulate pulse output. The system detects plasma presence and provides feedback signals to adjust pulse width, duration, and power delivery in real-time, creating a closed-loop control system that optimizes energy efficiency while maintaining safety compliance.
Solution Approach 2:
The patent applies dynamics by replacing fixed pulse durations with dynamic, adaptive pulse widths that automatically adjust based on real-time plasma detection. The control unit monitors plasma presence and modifies pulse parameters accordingly, allowing the system to extend pulse duration when plasma is detected (improving ignition efficiency) while reducing or pausing power delivery when plasma is absent (preventing excessive energy consumption and averaging above safety limits).
Data Source
AI summary
A high-frequency generator connects an electrosurgical instrument, including an electrical output connection point for an electrosurgical instrument, a power supply, which is at least indirectly connected to the output connection point, and a power controller for controlling the electrical output power output via the output connection point. The power controller is designed to begin the output of an electrical output power when an output energy balance amount is greater than an output energy limit value and to end the output of the electrical output power when the output energy balance amount falls below a minimum value.