Biphasic Waveform Generator With Independent Energy Reservoirs
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Solution Overview
Problem
Current defibrillators, including manual, implantable, and wearable devices, face limitations in delivering biphasic pulses due to a single high-energy reservoir, leading to high energy levels required for efficacy, which result in skin and organ damage, and restrict device size and longevity, as well as patient discomfort.
Innovation Solution
A novel biphasic or multiphasic waveform generator system with multiple independent energy reservoirs and sources, allowing for dynamically adjustable pulse waveforms with varying timings, phase tilts, and amplitudes, including scenarios where the second phase has a larger amplitude than the first phase, enabling lower energy delivery and wider waveform variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single high-energy reservoir is used to deliver biphasic pulses, then the device structure is simple and convenient, but the energy required for defibrillation is excessively high causing tissue damage
Solution Approach 1:
The single high-energy reservoir is divided into multiple independent energy reservoirs (first energy reservoir and second energy reservoir). Each reservoir can be independently charged and discharged to generate separate pulse phases, enabling precise control over energy delivery to reduce tissue damage while maintaining device functionality.
Solution Approach 2:
The system enables independent adjustment of amplitude, duration, and energy parameters for each pulse phase through separate control circuits. This allows optimization of defibrillation efficacy while minimizing harmful effects by delivering lower energy in the second phase compared to traditional single-reservoir systems.
2Reliability
If high energy levels are delivered for defibrillation efficacy, then the therapeutic effect is achieved, but skin and organ damage occurs
Solution Approach 1:
The defibrillation pulse is segmented into multiple phases from different energy reservoirs. The first phase delivers high energy for immediate defibrillation efficacy, while subsequent phases deliver reduced energy to maintain therapeutic effect without causing excessive tissue damage.
Solution Approach 2:
The system converts the potentially harmful high energy delivery into a beneficial multi-phase waveform where the first phase provides the necessary high energy shock, and the second phase uses residual or reduced energy to stabilize the cardiac rhythm without causing additional tissue damage.
3Device complexity
If a single energy reservoir is used, then the device is simple, but the device size cannot be reduced further
Solution Approach 1:
Multiple energy reservoirs are integrated into a unified control system with shared charging and discharge circuits. This merging approach allows the system to achieve reduced device size through efficient space utilization while maintaining the benefits of multiple independent energy sources for waveform variability.
4Ease of operation
If high energy reservoir is partially drained during first phase, then the first phase is delivered, but the second phase has lower amplitude constraining waveform design
Solution Approach 1:
The energy storage system is segmented into independent reservoirs where the first reservoir handles the first phase and the second reservoir handles the second phase. This segmentation ensures that each phase has access to full energy capacity, enabling flexible waveform design with varying amplitudes and durations for both phases without being constrained by partial draining of a single reservoir.
Data Source
AI summary
A therapeutic signal delivery system and method that delivers a dynamically adjustable biphasic or multiphasic pulse are provided. The dynamically adjustable biphasic or multiphasic therapeutic pulse may be used for a variety of therapeutic treatments.