Respiratory Humidification Control for Condensation-Free Gas Delivery
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Solution Overview
Problem
Conventional humidification systems face issues with condensation formation in respiratory circuits due to temperature gradients, leading to safety concerns and disruptions in gas delivery to patients, as manual removal of condensation is time-consuming and can cause respiratory distress.
Innovation Solution
A humidification system that employs a pulsed delivery of a humidifying agent during inhalation cycles and a reduced delivery during exhalation cycles to vaporize condensation in the respiratory circuit, using a flow controller and heated elements to maintain the humidifying agent in a vapor state and control the gas temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a respiratory circuit is used to deliver humidified gas to the patient, then the patient receives humidified gas and the evaporating components are located away from the patient, but condensation forms in the respiratory circuit due to temperature gradients
Solution Approach 1:
The system uses periodic heating cycles where the heating element is activated at specific intervals to maintain the temperature of the respiratory circuit above the dewpoint, preventing condensation formation. This periodic action addresses the temperature gradient issue by intermittently compensating for heat loss to the environment.
Solution Approach 2:
The system changes the temperature parameter of the respiratory circuit by applying controlled heating. The heating element adjusts the thermal state of the circuit to maintain conditions where condensation does not occur, specifically keeping the circuit temperature above the dewpoint of the humidified gas.
2Object-generated harmful factors
If heating elements are added to the respiratory circuit to reduce condensation, then condensation is minimized, but the device complexity increases
Solution Approach 1:
The heating element is integrated into the respiratory circuit in a way that it serves dual purposes: it prevents condensation while being controlled by the existing system infrastructure. The heating element works autonomously to maintain temperature conditions, reducing the need for additional complex control mechanisms.
3Object-generated harmful factors
If manual removal of condensation is performed, then the respiratory circuit can be cleared, but the continuity of gas delivery is broken and respiratory distress may occur
Solution Approach 1:
The heating element proactively prevents condensation formation by maintaining the respiratory circuit temperature above the dewpoint throughout operation. This preliminary anti-action eliminates the need for subsequent condensation removal activities, ensuring continuous gas delivery without interruptions or risks of respiratory distress.
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 effectively reduces condensation in the respiratory circuit, ensuring continuous and safe delivery of humidified gas to patients by precisely controlling the humidifying agent flow and temperature, thereby minimizing disruptions and risks associated with condensation.
Implementation Method 1
a heated element of the humidifier portion for vaporizing the first amount of the humidifying agent and maintaining the first amount of the humidifying agent in a vapor state
Implementation Method 2
a heated element of the humidifier portion for vaporizing the first amount of the humidifying agent and maintaining the first amount of the humidifying agent in a vapor state when the first amount of the humidifying agent is combined with the first volume of gas
Data Source
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AI summary
The present invention provides a method and apparatus for reducing condensed humidifying agent in a humidification system by pulsing a delivery of humidifying agent into a respiratory circuit. During a non-pulsed interval, gas flowing through the respiratory circuit will evaporate the condensed humidifying agent present in the respiratory circuit. The present invention also provides a method and apparatus for delivering humidified gas to a patient, wherein the delivery avoids the problems associated with a stationary water humidifier. In the method, the delivery of humidifying agent is precisely controlled to deliver a flow of humidifying agent to a volume of gas.