Systems and methods for active power management in a medical device
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Solution Overview
Problem
Current respiratory treatment devices face challenges in comfort, efficacy, ease of use, and power management, particularly in delivering pressurized and humidified air for extended periods, which can lead to patient non-compliance due to discomfort and inefficiencies in power distribution among device components.
Innovation Solution
The implementation of adaptive power management systems in respiratory treatment devices that include a power supply, pressure generators, heating elements, and sensors to dynamically control the operation of these components, ensuring efficient power distribution and optimizing the delivery of pressurized and humidified air based on real-time sensor data and respiratory cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is continuously supplied to all components at maximum capacity, then treatment efficacy and comfort are improved, but power supply overload and energy waste occur
Solution Approach 1:
The system dynamically adjusts power distribution to components based on real-time operational needs and patient respiratory patterns, transitioning from static maximum power supply to adaptive power management that matches actual demand while ensuring treatment consistency
Solution Approach 2:
The controller modifies power delivery parameters (voltage, current, timing) to various components including the pressure generator, humidifier, and heating elements based on detected respiratory events and treatment requirements, optimizing energy usage while maintaining therapeutic efficacy
2Ease of operation
If multiple components operate simultaneously at high power, then treatment comfort and efficacy are enhanced, but device reliability decreases due to power supply limitations
Solution Approach 1:
The system implements periodic power delivery cycles to different components, activating heating elements and humidifiers in alternating phases rather than simultaneously, ensuring patient comfort through consistent temperature and humidity while preventing power supply overload
Solution Approach 2:
The controller pre-cools or pre-heats components and anticipates power needs based on detected respiratory patterns, preparing components before peak demand periods to maintain comfort without requiring simultaneous high-power operation of all components
3Loss of energy
If power is reduced to conserve energy, then energy efficiency improves, but treatment consistency and patient comfort deteriorate
Solution Approach 1:
The system continuously monitors patient respiratory patterns, comfort indicators, and component performance, using this feedback to adjust power delivery in real-time, ensuring treatment consistency while minimizing energy consumption by delivering power only when and where needed
Solution Approach 2:
The device autonomously manages its own power distribution without external intervention, using onboard sensors and controllers to detect when treatment is needed and automatically adjusting component power levels to balance energy conservation with therapeutic requirements
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 approach enhances patient compliance by improving comfort and efficacy while optimizing power usage, reducing the risk of overloading the power supply and ensuring consistent treatment delivery, thus addressing the limitations of existing devices.
Implementation Method 1
a pressure generator configured to generate a flow of breathable gas
Implementation Method 2
one or more heating elements; a first control signal for controlling a first heating element disposed in a humidifier configured to store a supply of water to humidify the breathable gas, and a second control signal for controlling a second heating element configured to heat the humidified breathable gas
Data Source
AI summary
A respiratory treatment device includes a blower for providing flow of breathable gas to a patient and one or more accessory devices. The respiratory treatment device includes active power management to distribute power from a power source that does not have sufficient power to simultaneously power the blower and the accessory devices. The active power management prioritizes power to the blower and limits, based on current measurements of the blower and the accessory devices, the power supplied to the accessory devices to keep the sum of the power drawn at or below the capacity of the power supply. When additional power is available, due reduced power consumption of the blower, the power to one or more accessory devices is raised beyond a target in order to compensate for when power was not supplied to the one or more accessory devices.