Masimo to Present at William Blair & Company 30th Annual Growth Stock Conference

June 4, 2010

IRVINE, Calif., June 4, 2010 /PRNewswire via COMTEX/ --Masimo (Nasdaq: MASI), the inventor of Pulse CO-Oximetry(TM) and Measure-Through Motion and Low Perfusion pulse oximetry, today announced that its management is scheduled to present at the William Blair & Company 30th Annual Growth Stock Conference at The Four Seasons Hotel in Chicago on Wednesday, June 16, at 10:00 a.m. Central Time. A live audiocast of the presentation will be available on the Masimo website at www.masimo.com. A replay of the audiocast will be available following the live presentation.

About Masimo

Masimo (NASDAQ: MASI) develops innovative monitoring technologies that significantly improve patient care--helping solve "unsolvable" problems. In 1995, the company debuted Measure-Through Motion and Low Perfusion pulse oximetry, known as Masimo SET(R), which virtually eliminated false alarms and increased pulse oximetry's ability to detect life-threatening events. More than 100 independent and objective studies demonstrate Masimo SET provides the most reliable SpO2 and pulse rate measurements even under the most challenging clinical conditions, including patient motion and low peripheral perfusion. In 2005, Masimo introduced Masimo Rainbow SET(R) Pulse CO-Oximetry(TM), allowing noninvasive and continuous monitoring of blood constituents that previously required invasive procedures, including total hemoglobin (SpHb(R)), oxygen content (SpOC(TM)), carboxyhemoglobin (SpCO(R)), methemoglobin (SpMet(R)), and PVI(R), in addition to SpO2, pulse rate, and perfusion index (PI). In 2009, Masimo introduced Masimo Rainbow SET(R) Acoustic Monitoring(TM), the first-ever noninvasive and continuous monitoring of acoustic respiration rate (RRa(TM)). Masimo's Rainbow platform offers a breakthrough in patient safety by helping clinicians detect life-threatening conditions and helping guide treatment options. Founded in 1989, Masimo has the mission of "Improving Patient Outcomes and Reducing Cost of Care by Taking Noninvasive Monitoring to New Sites and Applications." Additional information about Masimo and its products may be found at www.masimo.com.

    Investor Contact:                    Media Contact:
    Sheree Aronson                       Dana Banks
    Vice President, Investor Relations   Manager, Public Relations
    Masimo Corporation                   Masimo Corporation
    (949) 297-7043                       (949) 297-7348
    saronson@masimo.com                  dbanks@masimo.com


Masimo, SET, Signal Extraction Technology, Improving Outcomes and Reducing Cost of Care by Taking Noninvasive Monitoring to New Sites and Applications, Rainbow, SpHb, SpOC, SpCO, SpMet, PVI, RRa, Radical-7, Rad-87, Rad-57, Rad-9, Rad-8, Rad-5, Pulse CO-Oximetry and Pulse CO-Oximeter are trademarks or registered trademarks of Masimo Corporation.

SOURCE Masimo Corporation