Adaptive Oxygen Mixing With SpO2 Feedback and Manual Override
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current oxygen mixing and delivery systems for patients lack adaptive control mechanisms to precisely regulate oxygen levels based on real-time blood oxygen saturation, leading to suboptimal therapy and potential patient discomfort due to temperature and humidity issues.
Innovation Solution
An adaptive control system integrated with a pulse oximeter and PID controller that adjusts oxygen concentration in a gas blender system, using feedback from a patient's SpO2 levels to maintain target oxygen saturation, while also incorporating heating and humidification to ensure comfortable gas delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If adaptive control mechanisms are added to regulate oxygen levels based on real-time blood oxygen saturation, then oxygen delivery precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system where a pulse oximeter continuously monitors the patient's blood oxygen saturation (SpO2) levels and feeds this information back to a PID controller. The controller adjusts the oxygen concentration delivered to the patient based on the real-time SpO2 measurements, creating a closed-loop adaptive control system that precisely regulates oxygen delivery according to the patient's actual needs.
Solution Approach 2:
The system integrates multiple functions into a unified control architecture: the pulse oximeter serves both as a monitoring device and a control input source, the PID controller manages both oxygen concentration regulation and can coordinate with heating/humidification functions, and the gas delivery system handles both oxygen mixing and conditioned gas delivery. This multi-functional integration improves precision while managing complexity through shared control logic.
2Object-affected harmful factors
If heating and humidification are incorporated into the gas delivery system, then patient comfort is improved, but device complexity increases
Solution Approach 1:
The patent combines heating and humidification functions within the integrated gas delivery system. The controller coordinates these environmental conditioning functions with oxygen concentration regulation, merging multiple gas treatment processes into a unified system that delivers optimally conditioned oxygen therapy while managing complexity through centralized control.
3Reliability
If a PID controller with real-time SpO2 monitoring is implemented, then oxygen therapy effectiveness is improved, but ease of operation decreases
Solution Approach 1:
The PID controller with real-time SpO2 monitoring enables the oxygen therapy system to self-regulate and adapt to the patient's changing oxygen needs automatically. The system monitors the patient's blood oxygen saturation continuously and adjusts the oxygen delivery parameters without requiring manual intervention, making the therapy effective and adaptive while reducing the operational burden on healthcare providers.
Data Source
AI summary
An adaptive gas mixture controller system. A pulse oximeter interface receives pulse oximeter data. A gas blender interface communicates with a separate externally connected gas blender. A processor receives pulse oximeter data via the pulse oximeter interface and outputs data to the gas blender interface for adaptive feedback control of the gas mixture based upon the SpO2 level signals from the pulse oximeter interface. When the processor receives data from the gas blender indicating that the gas mixture has been manually changed, enters a manual override mode and halts sending adaptive feedback control signals to the gas blender. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.