Capnography basically monitors-
Capnography monitores end tidal CO2 levels ( CO2 in Exhaled gas ) It is based on the principle of absorption spectrophotometry . Normal levels of EtCO2 is 35-45mmg
Central venous pressure
Blood pressure during anesthesia
Concentration of exhaled CO2
Concentration of inhaled O2
Preoperative assessment and monitoring in anaesthesia