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New Clinical Studies Demonstrate the Accuracy of Masimo Noninvasive and Continuous Hemoglobin Monitoring Technology
Date:10/21/2009

and analyzed for total hemoglobin by laboratory CO-Oximeter. Masimo SpHb had a bias of 0.15 g/dL and precision of 0.92 g/dL, leading researchers to conclude that SpHb "measurement accuracy was unaffected by perfusion index levels" and offers an "acceptable alternative to invasive hemoglobin tests in many clinical scenarios."

Validation of a New Noninvasive Hemoglobin Algorithm in Patients Undergoing Liver Transplantation (A751)(2), a clinical study led by Dr. Klaus D. Torp at the Mayo Clinic in Jacksonville, Florida, compared SpHb measurements to 55 invasive laboratory measurements in five patients undergoing liver transplantation and found significant agreement between the two methods. The study showed that SpHb--using the new Masimo ReSposable(TM) Sensor that helps to reduce medical waste and costs----had a bias of 0.2 g/dL and precision of 0.8 g/dL. Researchers concluded that "the accuracy of noninvasive SpHb measurements obtained by the Pulse CO-Oximeter with new ReSposable sensors was high."

Additionally, two studies presented at the ASA highlight the importance of understanding the variation in invasive arterial and venous hemoglobin measurements. A study (A937) of 471 paired invasive hemoglobin measurements from 33 patients on two different invasive laboratory devices (Beckman Coulter® hematology analyzer and Nova Biomedical® CO-Oximeter) showed a bias of -0.97 g/dL and a precision of 0.58 g/dL. The authors noted that "different devices using different principles of operation can produce consistent differences in the absolute value of measurement."(3) Another '/>"/>

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