Electrosurgical Jaw Electrode Switching for Bipolar-Monopolar Control
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Solution Overview
Problem
Existing electrosurgical instruments face challenges in efficiently transitioning between bipolar and monopolar modes, particularly in maintaining precise tissue sealing and cutting while adapting to energy diversion and tissue impedance variations during surgical procedures.
Innovation Solution
The development of an electrosurgical instrument with a control circuit that adjusts power levels of monopolar and bipolar energy based on sensor readings, allowing for seamless transitions between modes and mitigating energy diversion, while incorporating a conductive circuit for bipolar energy return and a movable jaw configuration for tissue grasping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the instrument uses fixed power levels for monopolar and bipolar energy, then the device structure is simple, but the tissue sealing precision and energy management are insufficient
Solution Approach 1:
The patent implements dynamic power adjustment by equipping the instrument with sensors that detect tissue impedance and energy diversion in real-time, allowing the control circuit to adaptively modify monopolar and bipolar power levels during the tissue treatment cycle, thereby achieving precise tissue sealing while managing energy distribution
Solution Approach 2:
The instrument incorporates a feedback mechanism where sensors monitor tissue impedance and energy delivery conditions, and the control circuit uses this information to adjust power levels dynamically, ensuring optimal tissue sealing precision while responding to varying tissue characteristics and energy diversion
2Adaptability or versatility
If the instrument transitions between bipolar and monopolar modes, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The instrument is designed with multi-functionality by incorporating both bipolar electrodes (first and second electrodes on opposing jaws) and monopolar electrode configurations, allowing the same device to perform both bipolar and monopolar tissue treatment modes depending on surgical requirements
Solution Approach 2:
The instrument enables dynamic mode transition between bipolar and monopolar configurations through a control circuit that can switch electrode activations and adjust power delivery parameters, allowing seamless adaptation to different surgical needs without requiring separate instruments
3Productivity
If the instrument delivers high power energy to tissue, then the surgical efficacy is improved, but energy loss and harmful factors increase
Solution Approach 1:
The control circuit continuously monitors tissue impedance and energy delivery conditions through sensors, using this feedback to optimize power levels and minimize energy loss while maintaining effective tissue sealing and cutting performance
Solution Approach 2:
The instrument dynamically adjusts energy delivery parameters including power levels, pulse duration, and waveform characteristics based on real-time tissue response, enabling effective tissue treatment while minimizing unnecessary energy consumption and heat loss
4Ease of operation
If the instrument uses predetermined power scheme, then the operation is simple, but the adaptability to tissue impedance variations is poor
Solution Approach 1:
The instrument incorporates self-adjusting capabilities where sensors automatically detect tissue impedance variations and the control circuit autonomously modifies power levels without requiring manual intervention, maintaining ease of operation while adapting to varying tissue conditions
Solution Approach 2:
Real-time feedback from sensors monitoring tissue impedance enables the control circuit to automatically adjust power delivery parameters, combining automated adaptation with simple operation by eliminating the need for manual parameter adjustment
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
Enables precise tissue sealing and cutting with enhanced energy management, adapting to tissue impedance and minimizing energy loss, thereby improving surgical efficacy and precision.
Implementation Method 1
The second jaw comprises a second electrode configured to deliver a first monopolar energy to the tissue
Implementation Method 2
the third electrode is configured to cooperate with the first electrode to deliver bipolar energy to the tissue
Implementation Method 3
The conductive circuit defines a return path for the bipolar energy
Data Source
AI summary
An electrosurgical instrument comprising an end effector is disclosed. The end effector comprises a first jaw and a second jaw. The first jaw comprises a first electrode. The end effector is movable from an open configuration to a closed configuration to grasp tissue. The second jaw comprises a second electrode configured to deliver a first monopolar energy to the tissue, a third electrode, and a conductive circuit selectively transitionable between a connected configuration with the third electrode and a disconnected configuration with the third electrode. In the connected configuration, the third electrode is configured to cooperate with the first electrode to deliver bipolar energy to the tissue. The conductive circuit defines a return path for the bipolar energy. In the disconnected configuration, the first electrode is configured to deliver a second monopolar energy to the tissue.