IRVINE, Calif., Jan. 14 /PRNewswire-FirstCall/ -- Masimo , the inventor of Pulse CO-Oximetry(TM) and Measure-Through Motion and Low Perfusion pulse oximetry, today announced that a new study published in the January 2010 issue of the European Journal of Anaesthesiology found that Masimo PVI predicts fluid responsiveness as accurately as invasive stroke volume variation (SVV) and more accurately than invasive central venous pressure (CVP) in mechanically-ventilated patients undergoing major surgery.(1)
In the study, Dr. Zimmermann and colleagues at University Hospital Regensburg in Germany simultaneously measured PVI (obtained noninvasively using the Masimo Radical-7 Pulse CO-Oximeter), arterial pressure-based SVV (obtained invasively via radial arterial line using the Edwards Lifesciences FloTrac/Vigileo system), and CVP (obtained invasively via central venous catheter), in 20 patients immediately after induction of anesthesia and again after volume administration (6% hydroxyl-ethyl starch). Patients were classified as responders if stroke volume index (SVI), the amount of blood the heart pumps in each heartbeat, increased by 15% or more, and as non-responders if SVI did not increase 15%.
The researchers concluded that both PVI and SVV "can serve as valid indicators of fluid responsiveness in mechanically-ventilated patients undergoing major surgery," but only PVI "seems to provide a simple alternative for accurate, noninvasive, and continuous preload monitoring."
(1) Markus Zimmermann, Thomas Feibicke, Cornelius Keyl, Christopher Prasser, Stefan Moritz, Bernhard M. Graf, and Christoph Wiesenack. "Accuracy of Stroke Volume Variation Compared with Pleth Variability Index to Predict Fluid Responsiveness in Mechanically-ventilated Patients Undergoing Major Surgery." European Journal of Anaesthesiology 2010; Vol 27, No 00.
Forward Looking Statements
This press release includes forward-looking statements as defined in Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, in connection with the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on current expectations about future events affecting us and are subject to risks and uncertainties, all of which are difficult to predict and many of which are beyond our control and could cause our actual results to differ materially and adversely from those expressed in our forward-looking statements as a result of various risk factors, including, but not limited to: risks related to our assumptions regarding the repeatability of clinical results, risks related to our belief that Masimo PI provides unique clinical advantages as an automatic noninvasive measurement of low SVC and intraventricular hemorrhage in very low birth weight, preterm infants, risks related to our assumptions that Masimo PI is a useful noninvasive indicator of perfusion, an early predictor of high illness severity in neonates, and an early detection tool for left heart obstruction, and risks related to our assumptions that Masimo PI represents a more rapid, reliable and cost-effective clinical alternative for assessing perfusion and circulatory status, as well as other factors discussed in the "Risk Factors" section of our most recent reports filed with the Securities and Exchange Commission ("SEC"), which may be obtained for free at the SEC's website at www.sec.gov. Although we believe that the expectations reflected in our forward-looking statements are reasonable, we do not know whether our expectations will prove correct. All forward-looking statements included in this press release are expressly qualified in their entirety by the foregoing cautionary statements. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of today's date. We do not undertake any obligation to update, amend or clarify these forward-looking statements or the "Risk Factors" contained in our most recent reports filed with the SEC, whether as a result of new information, future events or otherwise, except as may be required under the applicable securities laws.
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