Aspect Medical to Report Second Quarter 2008 Results on July 24, 2008 Conference Call Scheduled for Same Day

Business Wire, July 11, 2008

NORWOOD, Mass. -- Aspect Medical Systems, Inc. (NASDAQ: ASPM) will report earnings results for the 2008 second quarter on Thursday, July 24, 2008. Following the earnings announcement on Thursday 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, please dial 1-800-762-8908 (domestic), 1-480-629-9039 (international), or access the webcast at www.aspectmedical.com on the Investor page, or at www.earnings.com. Telephone replays will be available by dialing 1-800-406-7325 (domestic), or 1-303-590-3030 (international), access code 3900884. The webcast replay will be available from July 24, 2008 to July 31, 2008.

About Aspect Medical Systems, Inc.

Aspect Medical Systems, Inc. (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 approximately 26 million patients and has been the subject of more than 3,300 published articles and abstracts. BIS technology is installed in approximately 80 percent of hospitals listed in the July 2007 U.S News and World Report ranking of America's Best Hospitals and in approximately 60 percent of all U.S. operating rooms. In the last twelve months BIS technology was used in approximately 19 percent of all U.S. surgical procedures requiring general anesthesia or deep sedation. BIS technology is available in more than 160 countries. Aspect Medical Systems has OEM agreements with nine leading manufacturers of patient monitoring systems. The company is also investigating how other methods of analyzing brain waves may aid in the diagnosis and management of neurological diseases, including depression and Alzheimer's disease. For more information, visit Aspect's Web site at http://www.aspectmedical.com.