Cardiac Ablation Protection Device with Multi-Mode Noise Filtering
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Solution Overview
Problem
High voltage pulses during pulsed electric field ablation procedures can induce currents that disrupt the operation of electronic devices used in cardiac applications, such as cardiac stimulators and mapping systems, posing a risk of device malfunction and damage.
Innovation Solution
A protection device is coupled between electronic devices to reduce induced currents, utilizing transformers, capacitors, diodes, and inductors to suppress common mode and differential mode currents, as well as balun circuits to mitigate alternating currents, ensuring the safety and functionality of cardiac stimulators and pacing devices during ablation procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high voltage pulses are applied during pulsed electric field ablation, then tissue ablation is achieved, but induced currents disrupt electronic device operation
Solution Approach 1:
A protection device is coupled between the electronic device and the ablation system to block induced currents from reaching the electronic device while allowing necessary signals to pass through. This intermediary component isolates the electronic device from the harmful electrical environment during ablation procedures.
Solution Approach 2:
The harmful induced currents are extracted or removed from the circuit path by using filtering components within the protection device. Capacitors and inductors are configured to divert or eliminate the induced current components before they can interfere with electronic device operation.
2Object-affected harmful factors
If protection devices with multiple filtering components are used, then induced currents are suppressed, but device complexity increases
Solution Approach 1:
Multiple filtering functions (capacitive filtering, inductive filtering, and diode protection) are merged into a single integrated protection device. This consolidation provides comprehensive protection against induced currents while minimizing the number of separate components that would otherwise be required.
Solution Approach 2:
The protection device is designed to handle multiple types of electrical interference simultaneously - common mode currents, differential mode currents, and high voltage transients - using a unified multi-functional architecture that combines various filtering and protection mechanisms in one unit.
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 protection device effectively suppresses induced currents, protecting cardiac stimulators and pacing devices from high voltage noise, ensuring reliable operation and reducing the risk of device malfunction during pulsed electric field ablation.
Implementation Method 1
The protection device may include one or more transformers configured to reduce the common mode currents or the differential mode currents
Implementation Method 2
The protection device may include one or more capacitors configured to shunt currents above a predetermined frequency to reduce the currents induced in the first electronic device
Implementation Method 3
The protection device includes one or more diodes configured to shunt high voltages away from the second electronic device
Implementation Method 4
The one or more inductors includes a first inductor coupled to a first lead of the first electronic device and a second inductor coupled to a second lead of the first electronic device. The first and second inductors may be configured to reduce alternating currents induced in the first and second leads
Data Source
AI summary
Systems, apparatuses, and methods for electroporation ablation therapy are disclosed, with a protection device for protecting electronic circuitry, devices, and/or other components from induced currents and voltages generated during a cardiac ablation procedure. A system can include an ablation device near cardiac tissue of a heart. The system can further include a signal generator configured to generate a pulse waveform, where the signal generator coupled to the ablation device and configured to repeatedly deliver the pulse waveform to the ablation device in synchrony with a set of cardiac cycles of the heart. The system can further include a protection device configured to suppress induced current and voltage in an electronic device coupled to the protection device.