NxStage Announces Supply Agreement With Kawasumi Laboratories for Blood Tubing Sets

Wednesday May 7, 2008

LAWRENCE, Mass., May 7 /PRNewswire-FirstCall/ — NxStage Medical, Inc. (Nasdaq: NXTM), a leading manufacturer of innovative dialysis products, today announced that its wholly-owned subsidiary, Medisystems Corporation, has entered into a new supply and distribution agreement with Kawasumi Laboratories, Inc. regarding Kawasumi’s continued supply of blood tubing sets to Medisystems through January 31, 2010.

We are pleased to extend our long-standing relationship with Kawasumi for blood tubing sets, said Jeffrey H. Burbank, President and Chief Executive Officer of NxStage Medical. I believe NxStage is well positioned to preserve and build upon Medisystems’ reputation for high quality and to grow the business further with new and innovative products for our customers. This is another significant agreement that we have successfully renewed since acquiring the company. I am pleased with the progress that we continue to see in this business.

Headquartered in Tokyo, Japan, Kawasumi Laboratories, Inc. has been providing high quality medical supplies worldwide since 1957. Kawasumi has been a pioneer in plastic molding technologies in Japan and has grown its proprietary manufacturing know-how in the markets of medical devices and pharmaceuticals.

About NxStage Medical

NxStage Medical, Inc. (Nasdaq: NXTM) is a medical device company, headquartered in Lawrence, Massachusetts, USA, that develops, manufactures and markets innovative products for the treatment of end-stage renal disease, or ESRD, and acute kidney failure. For more information on NxStage and its products, please visit the Company’s website at http://www.nxstage.com.

Forward-Looking Statements

This release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. All statements contained in this release that are not clearly historical in nature are forward-looking, and the words anticipate, believe, expect, estimate, plan, and similar expressions are generally intended to identify forward-looking statements. Examples of these forward-looking statements include statements as to the anticipated benefits of the Company’s new agreement with Kawasumi, the expected performance of the Medisystems’ business, and the development of new and innovative products. All forward-looking statements involve risks, uncertainties and contingencies, many of which are beyond NxStage’s control, which may cause actual results, performance, or achievements to differ materially from anticipated results, performance or achievements. Certain factors which may affect future operating results are detailed in NxStage’s filings with the Securities and Exchange Commission, including the Annual Report on Form 10-K for the year ended December 31, 2007. In addition, the statements in this press release represent NxStage’s expectations and beliefs as of the date of this press release. NxStage anticipates that subsequent events and developments may cause these expectations and beliefs to change. However, while NxStage may elect to update these forward-looking statements at some point in the future, it specifically disclaims any obligation to do so, whether as a result of new information, future events, or otherwise. These forward-looking statements should not be relied upon as representing NxStage’s expectations or beliefs as of any date subsequent to the date of this press release.

SOURCE NxStage Medical, Inc.

Contact:
Kristen K. Sheppard, Esq.
Vice President, Investor Relations
NxStage Medical Inc. (NXTM)
978/332-5923
Web site: http://www.nxstage.com