AI generated podcast from Tonya Piehl's lecture notes. This document details methods for analyzing and monitoring gas exchange in patients. **Analysis** techniques include invasive procedures like arterial punctures and noninvasive methods such as pulse oximetry. **Oxygen analyzers**, both galvanic and polarographic, measure inspired oxygen concentration. **Blood gas analyzers** measure pH, PO2, and PCO2, with other values calculated. **Capnometry** measures CO2 in the airway. The text also covers critical aspects like choosing arterial puncture sites, equipment, troubleshooting, and quality assurance.