Oxygen Delivery System Using Metabolic Consumption Feedback
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Solution Overview
Problem
Current oxygen delivery systems for patients with respiratory issues, such as COPD and lung diseases, face inaccuracies in oxygen saturation measurement due to perfusion dependence and motion artifacts, leading to inadequate oxygen delivery despite normal SpO2 levels, especially during increased oxygen demand.
Innovation Solution
An oxygen delivery system equipped with sensors to measure respiration and heart rates, using computer processors to determine metabolic oxygen consumption and adjust oxygen flow, volume, and pressure dynamically based on these metrics, ensuring precise oxygen delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pulse oximeters are used to monitor oxygen saturation, then oxygen levels can be monitored, but measurement accuracy deteriorates due to perfusion dependence and motion artifacts
Solution Approach 1:
The patent introduces an intermediary computational model that processes multiple sensor inputs (heart rate, respiration rate, activity level) to estimate oxygen consumption. This intermediary layer translates unreliable single-point SpO2 measurements into a more robust metabolic oxygen consumption estimate, resolving the contradiction between measurement availability and measurement accuracy.
Solution Approach 2:
The system implements feedback control by continuously monitoring heart rate, respiration rate, and activity level, then adjusting oxygen delivery based on the calculated metabolic oxygen consumption. This closed-loop feedback mechanism compensates for measurement inaccuracies by using multiple physiological parameters to dynamically adjust therapy, improving both measurement reliability and delivery accuracy.
2Quantity of substance
If oxygen delivery is increased to meet potential demand, then oxygen availability improves, but oxygen waste increases when demand is low
Solution Approach 1:
The patent applies dynamics by making oxygen delivery adjustable and responsive rather than fixed. The system dynamically modifies oxygen flow based on real-time estimation of metabolic oxygen consumption derived from heart rate, respiration rate, and activity level. This dynamic adjustment ensures oxygen availability matches actual demand, preventing both deficiency and waste.
Solution Approach 2:
The system changes delivery parameters (flow rate, concentration) based on calculated metabolic oxygen consumption. By continuously adjusting these parameters according to physiological demand indicators, the system optimizes the balance between oxygen availability and oxygen waste, delivering precisely what is needed without excess.
3Device complexity
If fixed oxygen flow is delivered, then system simplicity is maintained, but adaptability to changing oxygen demand deteriorates
Solution Approach 1:
The system implements self-service by automatically adjusting oxygen delivery based on physiological parameters without requiring manual intervention. The computational model autonomously calculates metabolic oxygen consumption from sensor data and controls delivery accordingly, maintaining simplicity for the user while achieving high adaptability through automated physiological responsiveness.
Data Source
AI summary
An oxygen delivery system provides controlled flow of oxygen-enriched gas to a patient. The system includes one or more sensors configured to measure respiration rate information and heart rate information of the patient. A computer system including one or more physical processors is operatively connected with the sensors. The physical processors are programmed with computer program instructions which, when executed cause the computer system to determine a metabolic oxygen consumption information of the patient from the respiration rate information and the heart rate information from the one or more sensors, and continuously adjust flow, volume and/or pressure of the oxygen-enriched gas delivered from an oxygen source of the oxygen delivery system to the patient based on the determined metabolic oxygen consumption information of the patient.