Masimo to Report First Quarter 2008 Financial Results on April 29, 2008

April 18, 2008

Conference call and webcast with Masimo CEO and CFO to begin after markets close at 2:00 p.m. PT (5:00 p.m. ET)

IRVINE, Calif., April 18 /PRNewswire-FirstCall/ -- Masimo Corporation (Nasdaq: MASI), the inventor of Pulse CO-Oximetry and Measure-Through-Motion-and-Low-Perfusion pulse oximetry, today announced it will release first quarter financial results for the period ended March 29, 2008 after the market closes on Tuesday, April 29, 2008.

A conference call to review the results will begin at 2:00 p.m. PT (5:00 p.m. ET) and will be hosted by Joe E. Kiani, Chairman and Chief Executive Officer, and Mark P. de Raad, Executive Vice President & Chief Financial Officer.

A live webcast of the conference call will be available online from the investor relations page of the Company's corporate web site at http://www.masimo.com. The dial-in numbers are (866) 831-6247 for domestic callers and (617) 213-8856 for international callers. The reservation number for both dial-in numbers is 82345350. After the live webcast, the call will remain available on Masimo's web site through May 29, 2008. In addition, a telephonic replay of the call will be available until May 13, 2008. The replay dial-in numbers are (888) 286-8010 for domestic callers and (617) 801-6888 for international callers. Please use reservation code 71776300.

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, 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, a breakthrough noninvasive blood constituent monitoring platform that can measure many blood constituents that previously required invasive procedures. Rainbow SET continuously and noninvasively measures total hemoglobin (SpHbTM) and oxygen content (SpOCTM) (both pending regulatory clearances), carboxyhemoglobin (SpCO(R)), methemoglobin (SpMet(R)), and PVITM, in addition to oxyhemoglobin (SpO2), pulse rate (PR), and perfusion index (PI), allowing early detection and treatment of potentially life-threatening conditions. 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 http://www.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, Pulse CO-Oximetry and Pulse CO-Oximeter are trademarks or registered trademarks of Masimo Corporation.

SOURCE Masimo Corporation

CONTACT: investors, Mark P. de Raad, Executive Vice President and Chief Financial Officer, +1-949-297-7080, mderaad@masimo.com, or Dana Banks, +1-949-297-7348, dbanks@masimo.com, both of Masimo Corporation

Web site: http://www.masimo.com