A-Train
A-Train
A-Train (pronounced: /ˈeɪˌtreɪn/) is a term used in medicine to describe a specific pattern observed in capnography, which is the monitoring of the concentration or partial pressure of carbon dioxide in the respiratory gases. The term is derived from the shape of the capnography waveform, which resembles the letter "A" followed by a train of similar shapes.
Etymology
The term "A-Train" is a combination of the English letter "A" and the word "train". The "A" refers to the shape of the waveform in capnography, while "train" refers to the series of similar shapes that follow, resembling a train of cars.
Related Terms
- Capnography: The monitoring of the concentration or partial pressure of carbon dioxide in the respiratory gases. It is a non-invasive technique that provides a graphical representation and measurement of CO2 levels in exhaled breath over time, which can be used to assess a patient's ventilatory status.
- Waveform: A graphical representation of a signal showing how the signal changes over time. In capnography, the waveform represents the concentration of CO2 in exhaled breath over time.
- Carbon Dioxide: A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.
- Respiratory Gases: The gases involved in the process of respiration, which include oxygen and carbon dioxide.
External links
- Medical encyclopedia article on A-Train
- Wikipedia's article - A-Train
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