Electrosurgical Tissue Segmentation Circuit Status Detection
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Solution Overview
Problem
Existing electrosurgical devices lack effective methods for accurately detecting and preventing short or open circuits during tissue segmentation, which can lead to inefficiencies and potential patient injury.
Innovation Solution
A tissue segmentation device equipped with a controller that uses voltage and current sensors to derive power factor and impedance, assigning circuit statuses based on predefined thresholds to ensure safe and efficient cutting by detecting short or open circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electrosurgical devices are used for tissue segmentation, then cutting efficiency is improved, but risk of circuit failures and patient injury increases
Solution Approach 1:
The system performs preliminary circuit status detection before tissue segmentation begins by applying a test signal and measuring impedance. This preliminary check identifies potential open or short circuit conditions beforehand, preventing dangerous operation while maintaining cutting efficiency through proactive safety verification.
Solution Approach 2:
The system continuously monitors circuit status during tissue segmentation by measuring impedance changes and detecting power factor deviations. This real-time feedback allows the system to identify circuit failures immediately and terminate operation, preventing patient injury while maintaining efficient cutting during normal operation.
2Productivity
If power output is increased for faster tissue segmentation, then productivity is improved, but risk of tissue temperature失控 and patient injury increases
Solution Approach 1:
The system continuously monitors impedance changes during tissue segmentation, which correlate with tissue temperature and thermal damage. When impedance deviates from expected ranges indicating excessive temperature, the system automatically adjusts or terminates power delivery, enabling high-power operation with safe temperature control.
Solution Approach 2:
The system dynamically adjusts power delivery parameters based on real-time impedance measurements and circuit status detection. By changing power levels in response to measured parameters, the system maintains optimal cutting speed while preventing dangerous temperature increases through adaptive control.
3Reliability
If circuit monitoring complexity is increased to detect all failure modes, then reliability is improved, but device complexity increases
Solution Approach 1:
The system uses a single impedance measurement mechanism to detect multiple circuit failure modes including open circuits, short circuits, and tissue overheating. This multi-functional approach achieves comprehensive monitoring reliability without increasing device complexity, as one measurement system serves multiple safety detection purposes.
Solution Approach 2:
The system detects different circuit failure modes by analyzing changes in electrical impedance parameters under different operating conditions. By interpreting variations in a single measured parameter (impedance) across different states, the system identifies multiple failure types without requiring separate sensors or complex monitoring circuits.
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 device ensures precise control of power output, preventing circuit failures and maintaining safe tissue temperature during segmentation, thereby enhancing surgical efficiency and safety.
Implementation Method 1
A tissue segmentation device equipped with a controller that uses voltage and current sensors to derive power factor and impedance
Implementation Method 2
electrosurgical devices and methods... safe tissue temperature during segmentation
Data Source
AI summary
A tissue segmentation device, controller, and methods therefore are disclosed. The device has an active electrode, a return electrode, a mechanical force application mechanism, voltage and current sensors, and a controller. The controller has a processing component, configured to assign a circuit status to a circuit comprising the at least one electrode. IF (PF≈0) and ((Vrms/Irms)≥T), THEN the circuit status is “open”. IF (PF≈0) and ((Vrms/Irms)<T), THEN the circuit status is “short”. PF is a power factor of power applied to the electrosurgical device. T is a threshold value.