| PACO2 | partial pressure of carbon dioxide in alveolar gas |
|---|---|
| RGC | radio-gas chromatography; remnant gastric cancer; retinal ganglion cell; right giant cell |
| RGE | relative gas expansion |
| SAO2 | oxygen saturation in alveolar gas |
| STPD | a volume of gas at standard temperature and pressure that contains no water vapor |