Which technology does capnography utilize to measure carbon dioxide levels?

Capnography measures carbon dioxide levels using infrared light. This technology operates based on the principle that carbon dioxide molecules absorb infrared light at specific wavelengths. A capnometer emits infrared light and measures the amount of light that passes through a gas sample. As CO2 concentration increases, it absorbs more infrared light, resulting in a lower amount of light detected on the other side. This transmission data is then used to produce a waveform and numerical reading of carbon dioxide levels, which is crucial for assessing ventilation in patients.

This method is widely used in clinical settings to monitor ventilation and can detect issues such as hypoventilation or malfunctioning breathing apparatuses. By effectively measuring CO2 levels in this way, capnography provides essential information regarding a patient's respiratory status.