Continuous Monitoring of Blood Oxygen Saturation During Extracorporeal Circulation

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Abstract
The Bentley “oxysat” oxygen saturation meier is a small, digital, battery-operated, dual wave length, optical device. Two probes, arterial and venous, are mounted into the extra corporeal blood line during openheart surgery.Correlation tests between van Slyke, Lex O2 con, and calculated saturations, have shown accuracy and repeatability of oxygen saturation values during extracorporeal circulation on twenty cardiac patients.The meter proved useful during extracorporeal circulation by providing access to immediate observation of blood saturation and valuable trend data in the course of perfusion, and allowing better control of gas and blood flow during bypass. It also helped prevent excessive pO2s, gaseous microemboli, effort factor during blood sampling, and blood waste.

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