High-Frequency Ventilator Tidal Volume Regulation
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Solution Overview
Problem
Existing high-frequency ventilation devices for patients require continuous manual adjustment of parameters such as oscillation frequency and pressure amplitude to maintain desired tidal volume, which is indirect and prone to errors due to changes in patient conditions, leading to inefficiencies and potential for hypoventilation or hyperventilation.
Innovation Solution
A device with a high-frequency generator and a flow sensor to directly measure and set tidal volume, allowing for automated regulation of pressure amplitude and oscillation frequency to maintain a constant tidal volume, reducing the need for continuous physician intervention and improving monitoring efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If manual adjustment of parameters (oscillation frequency and pressure amplitude) is used to set tidal volume, then the device can be operated with simpler control mechanisms, but the tidal volume delivery becomes indirect and requires continuous physician intervention
Solution Approach 1:
The device incorporates a flow sensor that continuously measures the actual tidal volume delivered to the patient and feeds this information back to the control system. The controller automatically adjusts the pressure amplitude based on the difference between the desired and actual tidal volume, eliminating the need for continuous manual intervention while maintaining precise control
Solution Approach 2:
The system performs self-regulation by automatically adjusting its own operating parameters (pressure amplitude) based on real-time feedback from the flow sensor. The device monitors its own performance and makes corrections without external intervention, enabling autonomous maintenance of target tidal volume
2Measurement precision
If indirect parameter setting (via oscillation frequency and pressure amplitude) is used, then the device structure can be simpler, but the precision and reliability of tidal volume delivery deteriorates due to changes in patient conditions
Solution Approach 1:
The patent replaces indirect mechanical parameter setting with direct electronic measurement and control. A flow sensor electronically measures actual tidal volume delivery, and an electronic controller automatically adjusts parameters based on this measurement, providing precise and reliable control that adapts to changing patient conditions
Solution Approach 2:
The flow sensor acts as an intermediary that directly measures the tidal volume delivered to the patient, providing accurate real-time data to the control system. This intermediary measurement mechanism enables precise monitoring and adjustment without requiring complex direct manipulation of the breathing circuit
3Reliability
If continuous manual monitoring of tidal volume is performed, then the reliability of ventilation can be maintained, but the monitoring effort and time required increases significantly
Solution Approach 1:
The automated feedback system continuously monitors tidal volume delivery and immediately detects deviations from the target value. The control system responds automatically by adjusting the pressure amplitude, ensuring reliable ventilation without requiring the physician to continuously monitor and manually adjust parameters
Solution Approach 2:
The device performs self-monitoring and self-correction of tidal volume delivery. The flow sensor continuously measures actual delivery, and the controller automatically adjusts parameters to maintain target tidal volume, freeing the physician from continuous monitoring tasks while maintaining high reliability
Data Source
AI summary
A device is provided for respirating a patient by means of high-frequency ventilation, which has at least one device for setting a desired tidal volume by a user, and which has at least one regulating device for regulating an amplitude of the respiration pressure and/or at least one regulating device for regulating the oscillation frequency on the basis of the tidal volume determined. A corresponding method is provided for regulating a device for respirating a patient by high-frequency ventilation and a method is provided for respirating a patient.