Aspect Medical to Report First Quarter 2002 Results April 17, 2002; Conference Call Scheduled...

Business Editors

NEWTON, Mass.--(BUSINESS WIRE)--April 9, 2002

Aspect Medical Systems, Inc. (Nasdaq:ASPM) will report earnings results for the 2002 first quarter on Wednesday, April 17, 2002. Following the earnings announcement on Wednesday morning, the Company will host a conference

call and live webcast at 10:00 a.m. Eastern Time for all interested parties, including financial analysts, portfolio managers, individual investors and members of the press. To participate in the call, dial 888/413-4411 or 703/871-3795, or access the webcast at http://www.aspectmedical.com on the Investor page or http://www.StreetEvents.com. Telephone replays will be available by dialing 888/266-2086 or 703/925-2435, access code 5924863. The replay and the webcast will be available from April 17, 2002 until April 24, 2002.

Aspect Medical Systems (Nasdaq:ASPM) is a global market leader in brain monitoring technology. To date, the company's Bispectral Index (BIS) technology has been used to assess more than four and a half million patients and has been the subject of more than 850 published articles and abstracts. BIS is currently in use in the ORs and ICUs of more than 60 percent of the best-ranked hospitals in the U.S. (based on a U.S. News & World Report ranking of best hospitals) and is available in more than 160 countries. Aspect Medical Systems has recently secured OEM agreements with the six largest manufacturers of patient monitoring systems and partnerships with six of the largest group purchasing organizations in the United States. Based in Newton, Mass., Aspect employs more than 220 people worldwide. For more information, visit the company's web site at http://www.aspectmedical.com