In Situ Partial Pressure Sensor Calibration for Medical Ventilation
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Solution Overview
Problem
Conventional systems for calibrating gaseous analyte sensors in medical ventilation systems are cumbersome, often requiring disengagement from patients and additional equipment, leading to inconvenience and impracticality, and are susceptible to drift due to component deterioration and environmental factors.
Innovation Solution
A system comprising a partial pressure sensor, total pressure monitor, and calibration module that determines the partial pressure function in situ during normal operation, using samples of output signals and total pressure measurements to maintain target analyte concentrations, thereby reducing downtime and equipment needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional calibration methods are used, then sensor accuracy can be maintained, but patient treatment must be interrupted and additional equipment is required
Solution Approach 1:
The system performs self-calibration using its own sensors and existing gas delivery infrastructure. The calibration module utilizes the partial pressure sensor, total pressure sensor, and known gas delivery parameters to automatically determine calibration factors without external intervention or additional equipment.
Solution Approach 2:
The calibration system leverages the existing ventilator gas delivery mechanism and sensors for dual purposes: both calibration and patient treatment monitoring. The same partial pressure sensor and pressure sensors used for clinical monitoring are utilized for calibration, eliminating the need for separate calibration equipment.
2Reliability
If conventional calibration methods are used, then sensor drift can be corrected, but downtime increases and productivity decreases
Solution Approach 1:
The calibration process occurs continuously during normal ventilator operation rather than requiring discrete downtime. The calibration module continuously monitors sensor outputs and updates calibration factors in real-time, ensuring the system remains operational and productive throughout the calibration process.
Solution Approach 2:
The system performs preliminary calibration actions continuously in the background during normal operation. By initiating and maintaining calibration processes during routine ventilator function, the system prevents calibration-related downtime and maintains continuous productivity.
3Measurement precision
If conventional calibration methods are used, then measurement accuracy is maintained, but additional equipment and resources are required
Solution Approach 1:
The system uses its own existing sensors and processing capabilities to perform calibration without requiring external calibration equipment. The partial pressure sensor, total pressure sensor, and calibration module work together to self-calibrate using the ventilator's inherent gas delivery system.
Solution Approach 2:
The calibration function is merged with the existing ventilator monitoring system. The calibration module integrates with the partial pressure sensor and total pressure sensor, combining calibration operations with routine clinical monitoring to eliminate separate calibration equipment requirements.
Data Source
AI summary
One aspect of the invention relates to a system adapted to calibrate a determination of information related to one or more gaseous analytes in a body of gas being delivered to an objective by a gas source. In one embodiment the system comprises a partial pressure sensor, a total pressure monitor, a partial pressure module, and a calibration module. The partial pressure sensor generates an output signal related to the partial pressure of the one or more gaseous analytes in the body of gas. The total pressure monitor determines the total pressure of the body of gas. The partial pressure module determines the partial pressure of the one or more gaseous analytes in the body of gas according to a partial pressure function, wherein the partial pressure function describes the partial pressure of the one or more gaseous analytes in the body of gas as a function of the output signal generated by the partial pressure sensor. The calibration module that calibrates the partial pressure module by determining the partial pressure function.