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Screening Methanol Poisoning with a Portable Breath Detector
Jan van den Broek1, Dario Bischof1, Nina Derron2
1Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland.
Analytical Chemistry
|December 14, 2020
Summary
A new handheld breath detector offers rapid, noninvasive diagnosis for methanol poisoning. This low-cost device accurately measures methanol in breath, aiding timely treatment decisions and distinguishing it from ethanol poisoning.
Area of Science:
- * Biomedical Engineering
- * Analytical Chemistry
- * Toxicology
Background:
- * Methanol poisoning outbreaks are a significant public health concern, particularly in developing nations, often overwhelming healthcare systems.
- * Current diagnostic methods for methanol poisoning can be invasive, time-consuming, or require specialized laboratory equipment, delaying critical treatment.
- * Distinguishing methanol from ethanol poisoning is crucial for appropriate medical intervention.
Purpose of the Study:
- * To introduce and validate a novel, low-cost, handheld breath detector for the rapid, noninvasive diagnosis of methanol poisoning.
- * To assess the accuracy and reliability of the breath detector compared to established methods like mass spectrometry.
- * To evaluate the potential of the device for real-time clinical decision-making, including the need for antidote and hemodialysis.
Main Methods:
- * Development of a portable breath detector integrating a separation column and a micromachined chemoresistive gas sensor.
- * Wireless communication capability with a smartphone for data processing and display.
- * Validation study involving 20 volunteers, analyzing 105 methanol-spiked breath samples across a relevant concentration range (10-1000 ppm).
Main Results:
- * The handheld detector accurately quantified breath methanol concentrations within 2 minutes.
- * Results showed excellent agreement (R² = 0.966) with benchtop mass spectrometry measurements.
- * Bland-Altman analysis indicated sufficient limits of agreement for clinical decision-making regarding antidote and hemodialysis.
Conclusions:
- * The developed breath detector is a promising tool for rapid, noninvasive screening and severity assessment of methanol poisoning.
- * Its ease of use and accuracy support its application by first responders and clinicians in diverse healthcare settings.
- * The device can effectively differentiate methanol from ethanol poisoning and facilitate real-time monitoring during treatment.
