Electrosurgical Device Transformer for High Current Transmission
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Solution Overview
Problem
Long electrosurgical cables increase wire resistance, limiting the current that can be supplied to instruments, which is a challenge in delivering high current during electrosurgical procedures.
Innovation Solution
An electrosurgical system with a transformer that steps down the voltage of the power supplied by the generator, allowing for increased current transmission to the active electrodes, enabling the use of thinner and longer cables while maintaining effective energy delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If long connection cables are used to operate electrosurgical instruments, then the cable length is increased, but the wire resistance increases which limits the current that can be supplied
Solution Approach 1:
The electrosurgical instrument is divided into functional segments including a transformer component that steps down voltage and increases current. This segmentation allows the cable to transmit higher voltage at lower current, reducing resistive losses, while the transformer at the instrument end converts it to the required high current output.
Solution Approach 2:
The transformer changes the electrical parameters by stepping down voltage and stepping up current. This parameter transformation allows the system to transmit power over long cables with thinner conductors by using higher voltage during transmission, then converting to high current at the point of use.
2Loss of substance
If long cables with increased wire resistance are used, then current transmission is limited, but using thinner conductors would reduce material usage and costs
Solution Approach 1:
The transformer enables parameter changes in the electrical transmission by converting between high voltage/low current and low voltage/high current modes. This allows the use of thinner conductors with acceptable resistance by operating in high voltage mode during cable transmission, then converting to high current mode at the instrument.
Solution Approach 2:
The transformer acts as an intermediary device that mediates between the cable transmission requirements and the instrument power requirements. It enables the cable to use thinner conductors by transforming the electrical parameters to match the cable's transmission capabilities while still delivering the required power to the instrument.
3Reliability
If high current is transmitted through long cables, then the resistance limits current supply, but increasing cable thickness would reduce resistance
Solution Approach 1:
The transformer changes the current parameter by stepping up current at the instrument end while stepping down voltage. This allows the system to transmit power using higher voltage and lower current through the cable (reducing material requirements), then convert to high current for the electrosurgical function.
Solution Approach 2:
The system segments the electrical transmission function from the power conversion function. The cable handles only transmission at optimized parameters, while the transformer handles the power conversion to high current, eliminating the need for the cable itself to be designed for high current carrying capacity.
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
This solution enables the transmission of high current through longer cables with thinner conductors, reducing material usage and costs while ensuring effective electrosurgical performance.
Implementation Method 1
The electrosurgical device includes a transformer and one or more active electrodes coupled thereto, wherein the transformer is adapted to step down the voltage of the power supplied by the electrosurgical generator
Data Source
AI summary
An electrosurgical system is disclosed. The system includes an electrosurgical generator adapted to supply electrosurgical power and an electrosurgical device coupled to the electrosurgical generator. The electrosurgical device includes a transformer and one or more active electrodes coupled thereto, wherein the transformer is adapted to step down the voltage of the power supplied by the electrosurgical generator.