Infrared absorption analyzers are predominantly used to measure what substance?

Infrared absorption analyzers are specifically designed to measure the concentration of certain gases based on their infrared absorption characteristics. In particular, they are extremely effective in assessing the exhaled carbon dioxide content. This is because carbon dioxide strongly absorbs infrared light, allowing the analyzer to detect and quantify its levels in respiratory samples.

The technology relies on the principle that different gases will absorb infrared radiation at specific wavelengths. Since CO2 has a distinctive absorption spectrum in the infrared range, this method provides accurate and reliable measurements of its concentration, which is crucial for monitoring respiratory status and metabolic function.

In contrast, the other options do not align with the primary use of infrared absorption analyzers. Oxygen saturation is typically measured through pulse oximetry, blood glucose levels are assessed using different techniques such as glucometers or continuous glucose monitors, and the amniotic fluid index is evaluated through ultrasound rather than infrared absorption techniques. These differences highlight why exhaled carbon dioxide content is the predominant substance measured by infrared absorption analyzers.