High Flow Nasal Therapy Control Using Physiological Feedback
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Solution Overview
Problem
Existing high flow nasal therapy (HFNT) devices fail to adequately adapt to a subject's varying flow and oxygen concentration demands as they go about their day-to-day activities, particularly during transitions between different physical activities.
Innovation Solution
A control system that leverages both physiological and non-physiological sensors to generate a control signal for HFNT devices, adjusting parameters such as flow rate and oxygen concentration based on real-time subject needs, using a closed feedback loop that includes wearable devices and environmental sensors to anticipate and respond to changes in activity and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HFNT devices supply air at constant flow rate and oxygen concentration, then the device structure remains simple, but the therapy cannot adapt to subject's varying needs during different activities
Solution Approach 1:
The patent implements a feedback control system where sensors continuously monitor subject's physiological parameters (heart rate, SpO2, respiration rate) and movement parameters, and this information is fed back to the control unit which automatically adjusts HFNT flow rate and oxygen concentration accordingly. This resolves the contradiction by enabling adaptability through intelligent control rather than complex mechanical adjustments.
Solution Approach 2:
The HFNT device performs self-adjustment based on sensor data without requiring manual intervention. The control unit automatically processes sensor inputs and modifies therapy parameters autonomously, allowing the device to adapt to changing subject needs while maintaining relatively simple overall structure.
2Ease of operation
If manual adjustment of HFNT settings is required, then the device remains simple, but subject comfort and therapy effectiveness decrease due to lag in responding to activity changes
Solution Approach 1:
The device automatically adjusts its own settings based on real-time sensor data, eliminating the need for manual intervention. The control unit processes physiological and movement parameters continuously and autonomously modifies flow rate and oxygen concentration to match subject needs, thereby maintaining therapy effectiveness without compromising ease of operation.
Solution Approach 2:
The closed-loop feedback system continuously monitors subject status and automatically adjusts therapy parameters in real-time, ensuring therapy effectiveness is maintained without manual intervention. The system responds dynamically to activity changes, eliminating the lag associated with manual adjustment.
3Adaptability or versatility
If HFNT settings are not dynamically adjusted, then the device structure remains simple, but subject comfort deteriorates during transitions between activities
Solution Approach 1:
The patent uses feedback from physiological sensors (heart rate, SpO2, respiration rate) and movement sensors to dynamically adjust HFNT settings. The control unit processes this feedback in real-time and automatically modifies therapy parameters to match subject's activity level, enabling dynamic adaptation through intelligent control rather than complex mechanical systems.
Solution Approach 2:
The system anticipates subject needs by monitoring movement parameters and physiological indicators before significant changes occur. The control unit proactively adjusts therapy settings in anticipation of activity transitions, maintaining comfort during transitions rather than reacting after discomfort has occurred.
Data Source
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AI summary
Provided are concepts for controlling a high flow nasal therapy (HFNT) device used by a subject. In particular, physiological and movement parameter values of the subject are leveraged in order to generate a control signal for the HFNT device. These parameters may indicate an activity level of the subject, as well as the condition of the subject, providing information useful for setting appropriate operating conditions of the HFNT device. Thus, a means for automatically controlling a HFNT device based on needs of the subject may be provided, improving subject comfort during therapy, and ease of use of the HFT device.