Dynamic Temperature Offset for Pressure Support Condensation
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Solution Overview
Problem
Current pressure support systems for treating sleep disordered breathing often result in condensation within the patient breathing circuit due to temperature differences, as they maintain a constant heat level, which can lead to discomfort and airway dryness.
Innovation Solution
A pressure support system that includes a subject interface heater capable of controllably heating a pressurized breathable gas flow to a target temperature offset from a baseline temperature, using sensors and processors to dynamically adjust the temperature based on user input and environmental conditions, thereby maintaining comfort and preventing condensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a constant amount of heat is provided to the patient circuit to maintain a constant temperature, then condensation formation is reduced, but the system cannot adapt to changing environmental conditions or user comfort requirements
Solution Approach 1:
The system transitions from static constant temperature heating to dynamic temperature control. The target temperature is calculated by adding an offset value to the baseline temperature, allowing the heating system to adapt dynamically to changing environmental conditions and user comfort requirements while preventing condensation
Solution Approach 2:
The system changes the temperature parameter dynamically by introducing a temperature offset that can be adjusted based on environmental conditions and user preferences. The target temperature = baseline temperature + offset, allowing flexible adaptation while maintaining condensation prevention
2Quantity of substance
If the gas stream temperature is increased to provide more humidity to the user, then humidity delivery is improved, but condensation forms on the patient breathing circuit when ambient temperature is below gas stream temperature
Solution Approach 1:
The system optimizes the temperature parameter by establishing a target temperature that balances humidity delivery and condensation prevention. By dynamically adjusting the temperature offset, the system maintains sufficient heat for humidification while preventing the gas temperature from exceeding the ambient temperature threshold that causes condensation
3Stability of the object's composition
If the target temperature is fixed after initialization, then system stability is improved, but the system cannot respond to environmental changes or user comfort adjustments during operation
Solution Approach 1:
The system implements dynamic temperature control where the target temperature can be updated during operation. The processor recalculates the target temperature based on current environmental conditions and user input, allowing the system to respond to changes while maintaining stability through controlled adjustments
Solution Approach 2:
The system incorporates feedback mechanisms where environmental sensors continuously monitor conditions and user input is processed to adjust the temperature offset. This feedback loop allows the system to adapt to changing conditions while maintaining stable operation through gradual, controlled temperature adjustments
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 solution ensures the gas delivered to the subject is at a comfortable temperature and humidity level, reducing airway dryness and condensation, thereby enhancing the effectiveness of pressure support therapy.
Implementation Method 1
one or more baseline temperature sensors configured to generate one or more output signals conveying information related to a baseline temperature
Implementation Method 2
The subject interface heater is configured to controllably heat the pressurized flow of breathable gas to a target temperature
Data Source
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Figure 2
AI summary
The present disclosure pertains to a pressure support system configured to provide pressure support therapy to a subject, wherein the pressure support system comprises a subject interface heater configured to controllably heat a pressurized flow of breathable gas to a target temperature that is offset from a baseline temperature. The breathable gas baseline temperature target offset ensures the gas delivered to the subject is delivered at a comfortable temperature and/or humidity level that does not cause airway dryness or result in condensed water in the subject interface. In one embodiment, the pressure support system comprises one or more of a pressure generator, a subject interface, a subject interface heater, one or more subject interface temperature sensors, one or more baseline temperature sensors, one or more general sensors, a humidifier, a user interface, a processor, electronic storage, and/or other components.