Humidity Control Liquid Maximization Pressure Support
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Solution Overview
Problem
Conventional pressure support systems fail to account for usage time and liquid levels in humidifiers, leading to potential dry gas delivery, which can cause sore mucus membranes and other medical issues.
Innovation Solution
A pressure support system that includes a humidifier, usage time sensors, and processors to estimate usage time and control the humidifier's heating based on liquid levels, ensuring sufficient liquid remains for the duration of the therapy session.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional humidifiers continuously heat liquid to maintain target humidity, then consistent humidity level is achieved, but liquid depletes before therapy ends causing dry gas delivery
Solution Approach 1:
The system performs preliminary calculations of liquid consumption based on estimated usage time and adjusts heating parameters before liquid depletion occurs. The processor estimates how long the current liquid level will last and proactively modifies humidifier operation to ensure sufficient liquid remains for the complete therapy duration.
Solution Approach 2:
The humidifier operation is made dynamic by continuously adjusting heating power based on real-time liquid level monitoring and estimated usage time. The system transitions from static target humidity control to adaptive control that responds to changing liquid reserves and predicted therapy duration.
2Duration of action of moving object
If humidifier heating power is increased to extend liquid duration, then liquid supply duration is improved, but humidity level consistency deteriorates
Solution Approach 1:
The system dynamically adjusts heating power in response to liquid level and estimated usage time, creating a flexible control strategy that optimizes both liquid duration and humidity consistency through real-time adaptation rather than fixed power levels.
Solution Approach 2:
The system changes operational parameters (heating power, temperature setpoints) based on calculated liquid consumption rates and estimated usage time. By adjusting these parameters dynamically, the system extends liquid supply duration while maintaining adequate humidity levels through coordinated parameter modification.
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 consistent humidity levels during pressure support therapy, preventing dry gas delivery and associated medical issues by dynamically adjusting the humidifier's operation based on estimated usage time and liquid availability.
Implementation Method 1
humidifier configured to hold a volume of liquid and controllably elevate the temperature of the liquid such that vapor formed from the heated liquid humidifies the pressurized flow of breathable gas
Data Source
AI summary
A pressure support system configured to provide pressure support therapy to a subject is described. The pressure support system comprises a humidifier configured to control the humidity of gas provided to the subject during a sleep cycle to ensure an amount of liquid will remain in the humidifier at the conclusion of an estimated usage time. The pressure support system is configured to ensure humidified breathing gas is delivered to a subject during a usage time within a pressure support usage period. During times when the subject's moisture demand is greater than amount of moisture available in the humidifier, the pressure support system may decrease the amount moisture in the breathing gas so humidified therapy is available during the entire time the user is asleep.