Portable Oxygen Concentrator Breathing Detection via Pressure Thresholds
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Solution Overview
Problem
Portable oxygen concentrators (POCs) with traditional nasal cannulas that include nostril prongs often compromise user comfort and struggle to accurately detect breathing cycles due to the pressure changes associated with these designs, leading to inefficient oxygen delivery.
Innovation Solution
A POC system with a nasal fitting that does not include nostril prongs, utilizing a pressure sensor and controller to detect inhales and exhales based on relative pressure changes, delivering oxygen pulses during inhales and ceasing during exhales, with thresholds set to identify breathing cycles at lower pressure differentials than traditional systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional nasal cannulas with nostril prongs are used, then oxygen delivery can be established, but user comfort is compromised and breathing cycle detection becomes inaccurate
Solution Approach 1:
The invention removes the nostril prongs from the nasal cannula design, extracting the problematic element that caused both discomfort and inaccurate breathing detection. The fitting is repositioned to rest on the bridge of the nose without entering the nostrils, eliminating the source of the technical contradiction while maintaining oxygen delivery functionality.
2Measurement precision
If traditional pressure thresholds are used for breathing detection, then system simplicity is maintained, but detection accuracy at lower pressure differentials is lost
Solution Approach 1:
The invention changes the pressure threshold parameters from traditional high thresholds to lower thresholds that accurately capture the subtle pressure differentials generated by normal breathing. By adjusting these parameters, the system achieves higher detection accuracy without requiring complex additional hardware, resolving the contradiction between precision and complexity.
3Reliability
If continuous oxygen delivery is used, then patient safety is ensured, but system noise interference with breathing detection increases
Solution Approach 1:
The invention implements periodic oxygen delivery triggered by detected inhalations rather than continuous delivery. The controller delivers oxygen pulses synchronized with the user's breathing cycles, which reduces system noise during exhalation phases when breathing detection occurs, thereby eliminating the contradiction between reliability and noise interference.
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 configuration enhances user comfort and allows for effective and efficient oxygen delivery by accurately detecting breathing cycles at lower pressure differentials, ensuring proper timing of oxygen pulses and reducing system noise interference.
Implementation Method 1
detecting an inhale of a user when a difference between a pressure reading and a baseline value is less than or equal to an inhale threshold
Data Source
AI summary
This disclosure relates to a control system for a portable oxygen concentrator (POC). Specifically, this disclosure relates to a method and a system configured for use with an oxygen delivery system that includes nasal fitting which does not include nostril prongs. Because the nasal fitting does not include nostril prongs, user comfort is dramatically increased relative to prior designs. That said, because the fitting is free of nostril prongs, changes in pressure associated with the user's breathing register less than in oxygen delivery systems with traditional fittings (i.e., those that include nostril prongs). As such, the method and system of this disclosure is configured to associate relatively small changes in pressure with a breathing cycle of a user, thereby permitting effective and efficient POC operation.