SonoSite Announces Resignation from Board of Directors

May 15, 2003

BOTHELL, WA, May 15, 2003 - SonoSite, Inc. (Nasdaq: SONO), a leader in point-of-care ultrasound, today announced the resignation of Ernest Mario, Ph.D., from SonoSite's board of directors. Dr. Mario, who has served on the board since December 1999, plans to focus his time and energy on his recent appointment as chairman and chief executive officer of Reliant Pharmaceuticals, a privately held pharmaceutical company located in New Jersey."Dr. Mario has been a trusted advisor and highly respected member of our board," said Kirby L. Cramer, SonoSite's chairman of the board. "We thank him for his service and leadership, and wish him well.""Ernie has contributed to SonoSite's development since 1997, before our spin off from ATL Ultrasound, while he was a board member for ATL," said Kevin M. Goodwin, president and CEO. "With Ernie's departure we now have eight board members, and we have no immediate plans to fill the position." Under SonoSite's bylaws, the board can elect a director to fill a vacancy resulting from a resignation."It has been a pleasure to be involved with SonoSite's development, and I believe the Company has a solid, long-term future as its technology and business model continue to evolve," said Dr. Mario.About SonoSiteSonoSite, Inc. (www.sonosite.com) is the innovator and world leader in hand-carried ultrasound, with an installed base of more than 20,000 systems. The Company, headquartered near Seattle, Washington is represented by eight subsidiaries and a global distribution netwok in over 75 countries. SonoSite's small, lightweight systems are expanding the use of ultrasound across the clinical spectrum by cost-effectively bringing high performance ultrasound to the point of patient care. The Company employs approximately 450 people worldwide.

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