Oxygen Concentrator Ventilation Coupling Control
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Solution Overview
Problem
Oxygen concentrators are not well-suited for direct coupling with mechanical ventilators due to insufficient gas flow rates and lack of patient monitoring capabilities, making it difficult to provide effective ventilation therapy for patients with lung diseases like COPD.
Innovation Solution
An oxygen concentrator system that measures product gas and adjusts its operation to meet the supply gas requirements of a mechanical ventilator, while also monitoring patient status through pressure waveforms and flow rates to ensure effective oxygen and ventilation therapy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If an oxygen concentrator is directly coupled with a mechanical ventilator, then oxygen therapy can be provided to patients, but the gas flow rate is insufficient to meet ventilation requirements
Solution Approach 1:
A flow generator is introduced as an intermediary device between the oxygen concentrator and the patient. The flow generator receives low flow rate oxygen from the concentrator (1-10 LPM) and transforms it into high flow rate gas (up to 100 LPM) through mechanical generation, thereby resolving the flow rate insufficiency while maintaining ventilation effectiveness
Solution Approach 2:
The system merges the oxygen concentrator and flow generator into an integrated therapy system. The concentrator provides oxygen enrichment while the flow generator provides volume amplification, and their combined output meets both oxygen concentration and flow rate requirements for effective ventilation therapy
2Quantity of substance
If an oxygen concentrator is directly coupled with a mechanical ventilator, then oxygen therapy can be provided, but careful titration and oxygen sensor monitoring are required to maintain required oxygen concentration
Solution Approach 1:
The flow generator is designed to automatically maintain appropriate oxygen concentrations without requiring manual titration. The device self-regulates the mixing of oxygen-enriched gas with ambient air or additional oxygen to achieve target concentrations, eliminating the need for complex manual control and continuous sensor monitoring
Solution Approach 2:
The system incorporates oxygen sensors and control algorithms that continuously monitor output oxygen concentration and automatically adjust flow rates and mixing ratios. This closed-loop feedback control maintains precise oxygen concentrations while simplifying operation compared to manual titration methods
3Reliability
If an oxygen concentrator is used for ventilation therapy, then patient monitoring is desirable, but oxygen concentrators lack the ability to detect patient-related issues
Solution Approach 1:
The flow generator is designed to perform multiple functions: generating high flow rates, controlling oxygen concentration, and monitoring patient status. By integrating these functions into a single device, the system achieves comprehensive patient monitoring capability without requiring separate monitoring equipment, thereby improving reliability while managing complexity efficiently
Data Source
AI summary
One embodiment of the present invention sets forth a technique for operating an oxygen concentrator. The technique includes measuring a product gas within an oxygen concentrator to produce a product gas measurement, and determining that an output of the oxygen concentrator is fluidly connected to a respiratory ventilation device based on the product gas measurement. The technique further includes, in response to determining that the oxygen concentrator is fluidly connected to the respiratory ventilation device, determining that the output of the oxygen concentrator does not meet a supply gas requirement of the respiratory ventilation device and, in response to determining that the output of the oxygen concentrator does not meet the supply gas requirement, adjusting a control output in the oxygen concentrator to modify operation of the oxygen concentrator.