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March 16, 2017

Respiratory Therapy Magazine Article: Oximetry Assessment of Intracardiac and Great Vessel Shunts

Accriva's Senior Director of Scientific Affairs, Bruce Toben, RRT-NPS, CPFT, FAARC is featured in the Spring 2017 issue of Respiratory Therapy Magazine for his article on Oximetry Assessment of Intracardiac and Great Vessel Shunts.

Our Avoximeter 1000E system is ideally suited for the Cardiac Catheterization Lab for cardiac shunt detection by providing clinicians with direct oxyhemoglobin measurements. Many POC and blood gas devices report oxyhemoglobin saturation using a calculated value based on an algorithm of an assumed normal oxyhemoglobin dissociation curve, PO2, pH and a preset total hemoglobin value. Some whole blood oximeters use two light emitting diode wavelengths that have the capacity to only measure the hemobglobin species of oxyhemoglobin (%O2Hb) and reduced hemoglobin (%HHb). These systems, which either do not measure hemoglobin directly, or do not detect the full spectrum of hemoglobin species, report functional oxyhemoglobin saturation (SO2). Because they do not account for concentrations of carboxyhemoglobin (%COHb) or methemoglobin (%MetHb), they inherently report oxygen saturation results with a positive bias when correlated to the laboratory's gold standard (CO-Oximetry). In the presence of clinically elevated %COHb and %MetHb, patient management based on functional oxygen saturation may contribute to an erroneous assessment of cardiopulmonary function and the inappropriate interpretation of the step-up calculation.

To view the full article, click here.