Current Inrush Regulator for Electrosurgical Heat Control
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Solution Overview
Problem
In electrosurgical procedures, sudden surges of electrical current can cause undesirable heat in tissues, making it challenging to control current-induced heating, especially during brief applications.
Innovation Solution
A current inrush regulator is introduced between electrodes to temporarily shunt a portion of the electrical current, reducing the initial surge and allowing for controlled heating by transitioning to an open position as the current-induced heating causes the shunt to open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a sudden surge of electrical current is applied to the electrically conductive target, then the treatment can be applied quickly and efficiently, but excessive heat is generated causing undesirable effects on the tissue
Solution Approach 1:
The current inrush regulator is configured to automatically limit inrush current before the main treatment current is applied. The regulator includes a current limiting circuit that activates during the initial phase of current application to prevent excessive heat generation, then transitions to allow full treatment current flow.
Solution Approach 2:
The current inrush regulator serves as an intermediary device between the power source and the electrodes. It temporarily shunts or limits the current during the inrush phase, acting as a mediator that protects the tissue from harmful current surges while still enabling the necessary treatment current to be applied subsequently.
2Object-affected harmful factors
If the electrical current level is manually increased gradually, then the heat generation can be controlled to avoid undesirable effects, but the treatment time increases making it impractical for brief applications
Solution Approach 1:
The current inrush regulator dynamically adjusts the current flow characteristics automatically. It provides high current limiting during the initial phase, then transitions to allow full current flow without requiring manual adjustment. This dynamic behavior eliminates the need for gradual manual current increase while maintaining heat control.
Solution Approach 2:
The current inrush regulator is configured to automatically limit inrush current without requiring manual intervention. The device self-regulates the current flow based on the operational phase, eliminating the need for the surgeon to manually adjust current levels while still achieving controlled heat generation.
3Object-affected harmful factors
If a current inrush regulator is introduced to temporarily shunt current, then the initial heat surge is reduced and control is improved, but the device complexity increases
Solution Approach 1:
The current inrush regulator functionality is integrated into the existing electrosurgical instrument system. The regulator shares common components with the main treatment circuitry, such as the power source and control electronics, thereby reducing the overall device complexity increase while still providing effective inrush current limitation.
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 controlled application of current-induced heat at the tissue, reducing initial heating and allowing for enhanced control during electrosurgical procedures.
Implementation Method 1
A current inrush regulator is configured to temporarily shunt current between a first electrode and a second electrode
Implementation Method 2
heat caused by the electrical current flowing through the temporary shunt circuit causes the temporary shunt circuit to open
Data Source
AI summary
Disclosed embodiments include an apparatus, a system and a method for shunting current between first and second electrodes to temporarily reduce current applied through first and second electrodes. In a nonlimiting embodiment, an illustrative apparatus includes first and second electrode couplings configured to electrically engage proximal ends of the first and second electrodes, respectively, the first and second electrodes each having a distal end configured to conduct electrical current generated by a switchable current source therebetween and through an electrically conductive target. A current inrush regulator is configured to temporarily shunt at least a portion of the electrical current generated by the switchable current source to temporarily reduce the electrical current passing between the distal ends of the first and second electrodes through the electrically conductive target.