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Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
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Carbon dioxide (CO2) transport in the blood is critical to human physiology. On average, our body cells produce around 200 mL of CO2 per minute, precisely the quantity expelled by the lungs. This process involves the transportation of CO2 from the tissue cells to the lungs in three primary forms.
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Blood studies are critical in the medical field, enabling healthcare professionals to assess a patient's health status accurately. This page will focus on two significant blood studies: Arterial Blood Gas (ABG) and Venous Blood Gas (VBG).
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Updated: Oct 7, 2025

Expired CO2 Measurement in Intubated or Spontaneously Breathing Patients from the Emergency Department
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Carbon Dioxide Sensing-Biomedical Applications to Human Subjects.

Emmanuel Dervieux1, Michaël Théron2, Wilfried Uhring3

  • 1BiOSENCY, 1137a Avenue des Champs Blancs, 35510 Cesson-Sévigné, France.

Sensors (Basel, Switzerland)
|January 11, 2022
PubMed
Summary
This summary is machine-generated.

Continuous carbon dioxide (CO2) monitoring is vital in medicine. This review explores alternatives to current transcutaneous CO2 monitors, highlighting dye-based fluorescence sensing as a promising non-invasive option.

Keywords:
CO2carbon dioxidepaCO2ptCO2tcpCO2transcutaneous monitoring

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Area of Science:

  • Medical Devices
  • Biomedical Engineering
  • Analytical Chemistry

Background:

  • Transcutaneous carbon dioxide (CO2) monitoring is crucial for human subjects in medical practice.
  • Current Stow-Severinghaus electrode-based monitors are expensive, bulky, and prone to drift, necessitating frequent recalibration.

Purpose of the Study:

  • To thoroughly review existing CO2 measurement techniques.
  • To identify potential alternatives for developing future non-invasive clinical CO2 monitors.

Main Methods:

  • Comprehensive review of various CO2 sensing techniques.
  • Analysis of physicochemical working principles, merit criteria, advantages, and drawbacks.
  • Evaluation of clinical constraints and specificities of current monitoring methods.

Main Results:

  • Existing transcutaneous CO2 monitors have significant limitations.
  • Dye-based fluorescence CO2 sensing demonstrates potential for non-invasive monitoring.

Conclusions:

  • Transcutaneous sensing combined with dye-based fluorescence CO2 sensing shows the most promise for future non-invasive clinical CO2 monitoring.
  • This approach could overcome the limitations of current technologies.