Catheter High-Voltage Circuit for Fast Target Voltage Switching
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Solution Overview
Problem
Pulsed electric field ablation technology for treating arrhythmias is limited by the inability of high-voltage generating circuits to quickly switch to target voltages, leading to inefficiencies and potential damage to adjacent tissues during pulmonary vein isolation.
Innovation Solution
A high-voltage generating circuit for a catheter utilizing multiple input-parallel and output-series voltage conversion units, along with energy storage units and control units, allows for rapid switching of output voltage to a target voltage and widens the voltage range, enhancing the application of pulsed electric field ablation technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional high-voltage generating circuit is used, then the circuit structure is simple, but the output voltage cannot be quickly switched to the target voltage
Solution Approach 1:
The high-voltage generating circuit is divided into multiple voltage conversion units (first, second, third, and fourth voltage conversion units) with different voltage conversion ratios. Each unit can be independently controlled to switch between different voltage output levels, enabling fast voltage switching without requiring a complete circuit redesign. This segmentation allows the system to achieve multiple voltage outputs while maintaining manageable circuit complexity through modular design.
2Object-affected harmful factors
If pulsed electric field ablation is used, then tissue selectivity is improved, but the slow voltage switching limits clinical application
Solution Approach 1:
The circuit incorporates dynamic control capabilities through multiple voltage conversion units with different conversion ratios that can be activated based on real-time clinical requirements. The control unit dynamically selects and switches between different voltage output levels (first, second, third, or fourth voltage outputs) depending on the specific ablation needs, enabling both selective tissue treatment and efficient clinical workflow by matching voltage output to procedural requirements.
3Adaptability or versatility
If a single voltage output is used, then the circuit is simple, but the treatment versatility is limited
Solution Approach 1:
The high-voltage generating circuit is designed with multiple voltage conversion units that can be selectively activated to provide different voltage outputs for different treatment scenarios. The first voltage conversion unit provides a first voltage output, the second provides a second voltage output, the third provides a third voltage output, and the fourth provides a fourth voltage output. This multi-functional design allows a single circuit to serve multiple treatment purposes while maintaining controlled complexity through selective activation of required units.
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 quick and efficient switching of output voltage to target values, improving the safety and effectiveness of pulsed electric field ablation by minimizing tissue damage and expanding the treatment capabilities for arrhythmias.
Implementation Method 1
each voltage conversion unit is configured to perform voltage conversion on the input voltage and charge the corresponding energy storage unit
Implementation Method 2
N energy storage units correspond one-to-one to the N voltage conversion units, and each energy storage unit is connected between the output terminals of the corresponding voltage conversion units
Implementation Method 3
a control unit, which is connected to the N voltage conversion units and the voltage adjustment unit so as to obtain a target voltage of the high-voltage generating circuit, wherein the N voltage conversion units and the voltage adjustment unit are controlled according to the target voltage so as to adjust the output voltage of the total output terminal to be a target voltage
Implementation Method 4
a voltage adjustment unit, whose input terminal is connected to an output terminal of each voltage conversion unit, wherein an output terminal of the voltage adjustment unit is connected to the total output terminal so as to control the on-off switching between the output terminal of each voltage conversion unit and the total output terminal
Data Source
AI summary
A high-voltage generating circuit for a catheter and an ablation tool. The high-voltage generating circuit comprises: N voltage conversion units (111a, 121a, 131a, 141a), N energy storage units (112a, 122a, 132a, 142a), a voltage adjustment unit (200a), and a control unit (300a). Input ends of the N voltage conversion units (111a, 121a, 131a, 141a) are connected in parallel and then connected to a total input end, and output ends of the N voltage conversion units (111a, 121a, 131a, 141a) are connected in series and then connected to a total output end; the N energy storage units (112a, 122a, 132a, 142a) have one-to-one correspondence to the N voltage conversion units (111a, 121a, 131a, 141a); an input end of the voltage adjustment unit (200a) is connected to the output ends of the voltage conversion units (111a 121a 131a 141a) and an output end of the voltage adjustment unit (200a) is connected to the total output end; and the control unit (300a) is connected to the N voltage conversion units (111a, 121a, 131a, 141a) and the voltage adjustment unit (200a) so as to adjust the output voltage of the total output end to be a target voltage. In this way, the output voltage can be quickly switched to the target voltage by means of the multiple input-parallel output-series voltage conversion units (111a, 121a 131a, 141a), and meanwhile, the output range of the voltage is widened, such that the application prospect of a pulsed electric field ablation technology in treatment of arrhythmia is improved.