Implantable Electro-Medical Device Battery Life Optimization
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Solution Overview
Problem
Existing electro-medical devices for electrical stimulation have limited operational life due to the service life of their energy sources, which is influenced by various parameters in the stimulation regimen, necessitating a solution to optimize these parameters for extended device functionality.
Innovation Solution
A programmable electro-medical device with a microprocessor that adjusts therapy protocol parameters, such as pulse width, frequency, and duty cycle, to optimize the operational life of the power source, using equations like LBAT=CAPBAT·effUSE·IBAT, where IBAT incorporates terms for stimulation and overhead currents, voltage, and telemetry, to extend battery life and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrical stimulation parameters (current, voltage, frequency, pulse width) are increased to improve therapeutic effectiveness, then the treatment efficacy is improved, but the power source service life is reduced
Solution Approach 1:
The device dynamically adjusts stimulation parameters (current, voltage, frequency, pulse width, duty cycle) based on real-time battery status. The microprocessor monitors battery voltage and current draw, then modifies therapy protocol parameters accordingly to extend battery life while maintaining therapeutic effectiveness when possible.
Solution Approach 2:
The system changes physical parameters of the electrical stimulation (amplitude, frequency, pulse width, duty cycle) to optimize between therapeutic effectiveness and power consumption. The microprocessor varies these parameters based on battery status, allowing the device to operate effectively at high power when battery is strong and at reduced power when battery is depleted.
2Power
If the stimulation current and voltage are increased to enhance therapeutic effect, then the treatment intensity is improved, but the power source current draw increases reducing operational life
Solution Approach 1:
The device uses pulsed electrical stimulation rather than continuous stimulation. The microprocessor controls pulse repetition frequency, pulse width, and duty cycle to deliver therapeutic effects intermittently, allowing the battery to recharge or recover between pulses and reducing overall power consumption while maintaining treatment effectiveness.
Solution Approach 2:
The system maintains continuous therapeutic monitoring and adjustment, continuously adapting stimulation parameters to battery status. The microprocessor ensures uninterrupted therapy delivery by smoothly transitioning between different parameter sets based on real-time power availability, preventing treatment gaps while optimizing energy use.
Data Source
AI summary
A device for electrically stimulating one or more anatomical target sites in a patient and for use in the treatment of a plurality of biological conditions of the patient. The device has a pulse generator providing electrical stimulation to the anatomical target sites; a power source for powering the pulse generator; stimulator electrodes connected to the pulse generator for stimulating the anatomical target sites; one or more optional sensing electrodes for monitoring physiological parameters with reference to the anatomical target sites; and a microprocessor programmed to vary a plurality of therapy protocol parameters governing the electrical stimulation to thereby modify operational life parameters of the power source.