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Real-time Breath Analysis by Using Secondary Nanoelectrospray Ionization Coupled to High Resolution Mass Spectrometry
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Wearable Multimodal Detection System for Real-Time In Situ Analysis of Exhaled Breath Condensate.

Zhifu Yin1,2, Yachuan Qu1, Yang Yang1

  • 1National Key Laboratory of Automotive Chassis Integration and Bionics, School of Mechanical and Aerospace Engineering, Jilin University, Changchun 130022, China.

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Summary

A new wearable system collects and analyzes exhaled breath condensate (EBC) in real-time without power. This noninvasive device monitors respiratory health by detecting key analytes and parameters for early disease screening.

Keywords:
bio-inspired collectorenzyme-free electrochemical sensorexhaled breath condensatein situ real-time analysisnoninvasive respiratory monitoringwearable multimodal detection system

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Area of Science:

  • Biomedical Engineering
  • Wearable Technology
  • Respiratory Diagnostics

Background:

  • Exhaled breath condensate (EBC) analysis is a noninvasive method for respiratory health assessment.
  • Conventional methods struggle with real-time, in situ detection and power-free EBC collection.
  • There is a need for advanced systems for continuous respiratory monitoring.

Purpose of the Study:

  • To develop a wearable multimodal detection system (WMDS) for efficient EBC collection and real-time analysis.
  • To enable power-free, in situ monitoring of EBC analytes and respiratory parameters.
  • To validate the WMDS for both physiological and pathological respiratory condition assessment.

Main Methods:

  • Designed a WMDS integrating a bio-inspired collector, electrochemical sensors, respiratory sensors, and a temperature sensor.
  • The collector mimics cactus spines for efficient, power-free EBC harvesting (4.1 μL/min).
  • Utilized wireless data transmission for real-time monitoring of EBC analytes (H2O2, nitrite, urea) and respiratory parameters (temperature, humidity, rate).

Main Results:

  • The WMDS successfully performed real-time, in situ analysis of EBC and respiratory parameters.
  • Demonstrated dual-range detection capabilities for physiological (low concentration) and pathological (high concentration) conditions.
  • Achieved low detection limits (e.g., 0.209 μmol/L for H2O2) and significant sensitivities for EBC analytes.

Conclusions:

  • The developed WMDS offers an efficient, power-free solution for EBC collection and multimodal analysis.
  • The system enables real-time, on-body respiratory monitoring, suitable for early disease screening and health management.
  • The WMDS shows significant potential for advancing noninvasive respiratory diagnostics and personalized healthcare.