Date:11/14/2007

t to predict and many of which are beyond our control, including: risks related to our assumption that the results of the PI study will be duplicated in future clinical studies and risks related to our assumptions regarding the correlation between PI and abnormal blood flow from the heart in CHD newborns, as well as changes in a patient's physiologic status, and other factors discussed in the "Risk Factors" section of our quarterly report on Form 10-Q for the quarter ended September 29, 2007, filed with the Securities and Exchange Commission on November 1, 2007. Although we believe that the expectations reflected in our forward-looking statements are reasonable, we do not know whether our expectations will prove correct. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. We do not undertake any obligation to update, amend or clarify these forward-looking statements or the risk factors contained in our quarterly report on Form 10-Q for the quarter ended September 29, 2007, whether as a result of new information, future events or otherwise, except as may be required under the federal securities laws.

(1) Granelli A, Ostman-Smith I. Noninvasive Peripheral Perfusion Index as

a Possible Tool for Screening for Critical Left Heart Obstruction.

Acta Paediatrica 2007;96:1455-1459.

Contact:

Tom McCall

Masimo Corporation

949-297-7075

Masimo, SET, Signal Extraction Technology, Radical, Radical-7, Rad-57, APOD, Improving Outcomes and Reducing Cost of Care by Taking Noninvasive Monitoring to New Sites and Applications, Rainbow, SpCO, SpMet, and Pulse CO-Oximeter are trademarks or registered trademarks of Masimo Corporation.

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SOURCE Masimo Corporation Copyright©2007 PR Newswire. All rights reserved

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