Battery-Powered Electrosurgical Wave Generator with Single Circuit
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Solution Overview
Problem
Traditional electrosurgical wave generators are large, heavy, and limited in portability, requiring external power and causing thermal necrosis of tissue due to high temperatures, which complicates surgical procedures and increases post-operative complications.
Innovation Solution
A portable, battery-powered electrosurgical wave generator with a control unit and pulse-width-modulation controller that adjusts output signals based on tissue impedance, incorporating a return electrode for safe energy flow and allowing for use in non-traditional settings, featuring a single circuit structure for cutting, coagulation, and bipolar modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional electrosurgical wave generators are used, then reliable RF energy delivery is achieved, but portability is limited due to large size and weight
Solution Approach 1:
The wave generator is divided into separate functional modules including a control unit, RF amplifier, and power supply system. This modular segmentation allows each component to be optimized independently, reducing overall system weight while maintaining functional reliability through dedicated specialized circuits for each task.
Solution Approach 2:
The control unit is designed to provide multiple RF output modes (coagulation, cutting, bipolar) through a single integrated circuit architecture. This multi-functionality eliminates the need for separate dedicated generators for each surgical mode, significantly reducing the weight and size of equipment that needs to be transported while ensuring reliable performance across all surgical applications.
2Productivity
If high power RF energy is delivered to cut tissue, then cutting effectiveness is improved, but thermal necrosis of adjacent tissue increases
Solution Approach 1:
The electrosurgical system employs pulsed RF energy delivery with variable duty cycles instead of continuous high-power delivery. By delivering energy in controlled pulses with appropriate intervals, the system achieves effective tissue cutting through cumulative thermal effect while allowing heat dissipation during pulse intervals, thereby preventing excessive thermal necrosis of adjacent tissue.
Solution Approach 2:
The system dynamically adjusts RF power output, pulse duration, and duty cycle in real-time based on tissue impedance feedback and selected surgical mode. This dynamic control allows optimization of cutting effectiveness for each specific surgical situation while automatically preventing thermal damage by reducing power when tissue resistance increases or when coagulation mode is selected, rather than using fixed high-power delivery.
3Manufacturing precision
If multiple output parameters are available for adjustment, then surgical precision is improved, but device complexity and ease of operation worsen
Solution Approach 1:
The control unit automatically detects tissue impedance and surgical conditions, then self-adjusts optimal RF output parameters including power level, pulse duration, and duty cycle without requiring manual intervention. This self-service capability maintains high surgical precision through automated parameter optimization while eliminating the complexity of manual parameter adjustment, allowing surgeons to simply select the desired surgical mode and let the system handle all technical adjustments.
4Reliability
If external power supply connection is required, then stable power delivery is achieved, but portability and adaptability to non-traditional settings are reduced
Solution Approach 1:
The power supply system is designed to operate across a wide range of input voltage parameters and configurations, accepting both AC wall power and DC battery power sources. The system automatically detects and adapts to the connected power source type, adjusting internal voltage regulation and current delivery parameters accordingly. This parameter flexibility enables stable RF power delivery whether powered from a wall outlet in a traditional operating room or from a battery in a non-traditional setting such as the operating theater or emergency scene.
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 solution enhances portability, reduces thermal necrosis, and simplifies surgical procedures by providing efficient and safe RF energy delivery, enabling use in various settings without external power and minimizing post-operative complications.
Implementation Method 1
The RF energy is produced by a wave generator and transmitted to a patient's tissue through a hand-held electrode that is operated by a surgeon. The hand-held electrode delivers an electrical discharge to cellular matter of the patient's body adjacent to the electrode. The discharge causes the cellular matter to heat up in order to cut tissue and/or coagulate blood vessels.
Implementation Method 2
The wave generator also includes a flyback converter circuit. The flyback converter circuit can be configured to directly generate the output signals.
Data Source
AI summary
A portable, battery powered electrosurgical wave generator is usable in performing electrically driven medical procedures. The wave generator can be small and lightweight to enable a user to carry and use the wave generator in non-operating room type settings. The wave generator can include a control unit that generates output signals in each of a cutting mode, coagulation mode, and a bipolar mode. The control unit can use a single circuit structure to generate the output signals for the cutting, coagulation, and bipolar modes. The output signals can be generated solely from a voltage produced by an incorporated battery within the generator.