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New Johns Hopkins School of Medicine Study Shows Masimo Noninvasive Hemoglobin Monitoring is Accurate During Complex Spine Surgeries
Date:1/18/2011

IRVINE, Calif., Jan. 18, 2011 /PRNewswire/ -- Masimo (Nasdaq: MASI) announced today that a new clinical study demonstrating the clinical accuracy of its noninvasive and continuous hemoglobin (SpHb®) monitoring technology breakthrough was presented last week at the Society for Technology in Anesthesia (STA) Annual Meeting.

The study, presented by the Johns Hopkins School of Medicine, evaluated the accuracy of Masimo SpHb—a noninvasive measurement of hemoglobin blood levels obtained using a Masimo Radical-7® Pulse CO-Oximeter™ with a Masimo rainbow® ReSposable Sensor.
SpHb measurements obtained from 28 patients undergoing complex spine surgeries were compared with invasive blood samples drawn simultaneously and analyzed by a central laboratory.  Results showed a mean bias of -0.3 for SpHb, a standard deviation of 1.0 g/dL and limits of agreement from -2.3 to 1.8 g/dL—demonstrating the "clinically acceptable accuracy" of SpHb when compared to a standard laboratory reference device.  Researchers concluded that "continuous noninvasive SpHb monitoring may lead to earlier intervention and improved patient safety and care in the OR setting."(1)

According to lead researcher, Lauren Berkow, MD, Associate Professor of Anesthesiology and Critical Care Medicine at the Johns Hopkins School of Medicine, "The Masimo noninvasive hemoglobin monitor correlated strongly with gold-standard laboratory hemoglobin even during significant blood loss.  The ability to continuously monitor hemoglobin during complex spine surgery may allow for earlier diagnosis and treatment of anemia related to surgical bleeding as well as prevent over-trans
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