Fractional exhaled nitric oxide gas concentration measuring system based on multiple gas sensors and method for measuring fractional exhaled nitric oxide gas concentration using the same

A multi-gas sensor system with a concentration correction unit addresses acetone interference in nitric oxide measurements, ensuring accurate diagnosis of asthma by calculating pure nitric oxide concentrations using a correlation-based algorithm.

KR1020260113835APending Publication Date: 2026-07-21KOREA INST OF MACHINERY & MATERIALS
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Applications
Current Assignee / Owner
KOREA INST OF MACHINERY & MATERIALS
Filing Date
2025-01-14
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing nitric oxide concentration measurement systems are inaccurate due to the influence of acetone gas, which affects the sensing results, especially when diagnosing conditions like asthma where nitric oxide concentrations are ultra-low and vary with biological and environmental conditions.

Method used

A multi-gas sensor system that includes a first sensor for nitric oxide and a second sensor for acetone, with a concentration correction unit to derive the pure nitric oxide concentration by applying a correlation-based algorithm to account for acetone's influence, using equations to calculate the accurate nitric oxide concentration.

Benefits of technology

The system accurately measures the concentration of nitric oxide by correcting for acetone interference, enabling precise diagnosis of conditions like asthma by deriving the pure nitric oxide concentration more quickly and accurately.

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Abstract

In a multi-gas sensor-based exhaled nitric oxide concentration measurement system and a method for measuring exhaled nitric oxide concentration using the same, the concentration measurement system includes a sensor unit and a concentration correction unit. The sensor unit measures a first gas concentration and a second gas concentration in the provided exhaled air. Based on the first gas concentration and the second gas concentration measured by the sensor unit, the concentration correction unit derives a pure first gas concentration excluding the influence received by the first gas concentration as the second gas concentration increases.
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