Masimo Initiates Limited Release of First-ever Noninvasive and Continuous Hemoglobin Monitors

Irvine, California – September 15, 2008 – Masimo (NASDAQ: MASI), the inventor of Pulse CO-Oximetry and Measure-Through-Motion-and-Low-Perfusion pulse oximetry, today announced limited release of its noninvasive and continuous hemoglobin (SpHb™) and oxygen content (SpOC™) monitors, Radical-7 and Rad-87. Masimo also announced the FDA 510(k) clearance of its latest Rainbow family of adhesive sensors capable of noninvasively measuring total hemoglobin and oxygen content, along with oxygen saturation (SpO2), pulse rate, pleth variability index (PVI), and methemoglobin (SpMet®), for use with Masimo Rainbow SET-enabled devices.

The limited release of Masimo Radical-7 and Rad-87 Pulse CO-Oximeters with noninvasive and continuous total hemoglobin technology will allow select hospitals around the world to be the first to pioneer a breakthrough technology that may make it safer, faster, and easier for healthcare professionals to measure hemoglobin—without removing a drop of blood. Hospitals purchasing noninvasive hemoglobin devices and selected for the limited product release will work closely with Masimo to implement the technology in their facilities and provide data on its impact on patient care.