Robotic Electrosurgical Control Circuit for Tissue Impedance Regulation
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Solution Overview
Problem
Current electrosurgical devices lack closed feedback control systems that can precisely regulate the rate of tissue impedance change during surgical procedures, leading to potential inefficiencies and variations in tissue treatment outcomes.
Innovation Solution
A robotic surgical system with a control circuit that generates control signals to deliver electrosurgical energy and motor drive signals, while receiving feedback signals to maintain a predetermined rate of tissue impedance change, ensuring consistent tissue treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrosurgical devices operate without closed feedback control, then the device structure remains simple, but the precision of tissue impedance regulation deteriorates
Solution Approach 1:
The patent implements closed feedback control by continuously monitoring tissue impedance through sensing electrodes and adjusting electrosurgical energy delivery based on the measured impedance changes. The control system receives feedback signals indicating tissue impedance and dynamically modifies energy output to maintain a predetermined rate of impedance change, thereby achieving precise tissue treatment while managing system complexity through automated control algorithms.
2Reliability
If closed feedback control is implemented, then tissue treatment consistency improves, but device complexity increases
Solution Approach 1:
The control circuit continuously monitors tissue impedance through feedback signals and dynamically adjusts electrosurgical energy delivery to maintain consistent tissue treatment outcomes. The system compares measured impedance changes against predetermined rates and automatically modifies energy output, ensuring reliable and repeatable tissue cutting and coagulation while managing complexity through integrated control algorithms.
Solution Approach 2:
The system performs self-regulation by automatically adjusting its own energy output based on real-time tissue impedance measurements. The control circuit monitors the tissue response and autonomously modifies electrosurgical energy delivery without requiring external intervention, thereby improving treatment consistency while keeping the user interface simple.
3Manufacturing precision
If feedback control signals are continuously adjusted, then tissue treatment precision improves, but energy consumption increases
Solution Approach 1:
The system employs periodic sampling of tissue impedance rather than continuous monitoring, adjusting electrosurgical energy delivery at discrete intervals based on measured impedance changes. This approach maintains precise tissue treatment by regularly updating control decisions while reducing overall energy consumption compared to truly continuous adjustment, balancing precision requirements with energy efficiency.
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 system enables precise control over tissue impedance, enhancing the consistency and effectiveness of tissue cutting and coagulation processes, thereby improving surgical precision and reducing tissue trauma.
Implementation Method 1
Electrical energy applied by an electrosurgical device can be transmitted to the instrument by a generator... Heat generated by the current flow through the tissue may form hemostatic seals within the tissue
Data Source
AI summary
A robotic surgical system comprising a surgical instrument comprising an end effector comprising (i) a blade, (ii) a first jaw member including a first electrode, and (iii) a second jaw member including a second electrode. The robotic surgical system may also comprise a motor and a control circuit configured to: (i) produce control signals comprising a first control signal and a second control signal, (ii) deliver an electrosurgical energy signal to the first electrode and the second electrode via the first control signal, (iii) deliver a drive signal to the motor via the second control signal (iv) receive at least one feedback signal, (v) determine a rate of change based on a first feedback signal of the at least one feedback signal, and (vi) maintain the rate of change at a predetermined rate or within a predetermined range.