The Bayer Chiron 865 Blood Gas Analyzer open system uses sensor technology and can calculate standard or actual bicarbonate (HCO3), estimated oxygen content (O2 CT), base excess in vivo or in vitro (BEvv or BEvt), base excess of blood [BE(B)] and of extracellular fluid [BE(ecf)], temperature corrected arterial-alveolar oxygen tension ratio, temperature corrected pH, pCO2, and O2, temperature corrected alveolar-arterial oxygen tension difference, temperature corrected respiratory index, and more. The Chiron 865 has the features and capabilities of automatic calibration at chosen intervals, patient reference ranges, QC ranges, customized printing options, quality control tracking, advanced on-board data management, waste system designed for bio-safety, automatic, reagent-path cleaning cycle, on-board roll printer with paper take-up spool, archive and backup capabilities, and more. Moreover, the analyzer can store around 1500 patient sample reports. Return Policy Items are sold as-is with no returns or refunds available unless explicitly stated.