Breaking Study: Masimo Pleth Variability Index (PVI) Shown Effective in Noninvasive Detection of Changes in Ventricular Preload and Fl...( Most recent addition to Masimo R...),Health

Most recent addition to Masimo Rainbow SET platform seen as having potential clinical application for the noninvasive detection of hypovolemia

and fluid responsiveness monitoring

SAN FRANCISCO, Oct. 15 /PRNewswire-FirstCall/ -- Masimo, the inventor of Pulse CO-Oximetry and Read-Through Motion and Low Perfusion pulse oximetry, reported that a new independent and objective clinical study presented today at the 2007 American Society of Anesthesiologists (ASA) Meeting in San Francisco demonstrated the ability of Pleth Variability Index (PVI) to accurately and noninvasively detect changes in ventricular preload. The newest addition to the Masimo Rainbow SET technology platform, PVI is a continuous and noninvasive quantified measurement of changes in the perfusion index, capturing volume changes that may compromise cardiac function and affect systemic circulation.

The study entitled "New Algorithm for Automatic Estimation of the Respiratory Variations in the Pulse Oximeter Waveform", was conducted at the Louis Pradel Hospital in Lyon, France, by a research team headed by Dr. Maxime Cannesson. The research team indicated that while respiratory variations in the pulse oximeter plethysmography waveform amplitude are sensitive to changes in preload and can predict fluid responsiveness in mechanically ventilated patients, they previously were not easily measured noninvasively from a bedside monitor. However, a new algorithm, PVI, available in the Masimo Rainbow SET technology platform may provide a new method for noninvasively predicting fluid responsiveness.

In this study, Dr. Cannesson and the research team tested the ability of PVI to detect changes in ventricular preload in 20 vascular surgery patients under mechanical ventilation. Mean arterial pressure (MAP) and central venous pressure (CVP) via arterial catheter and central venous catheter were recorded along with PVI at baseline and while patients were in head-down and h
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