FORM OF UNDERWRITING AGREEMENT NXSTAGE MEDICAL, INC. (a Delaware corporation) 5,613,371 Shares of Common Stock UNDERWRITING AGREEMENT Dated: June [ ], 2006 NXSTAGE MEDICAL, INC. (a Delaware corporation) 5,613,371 Shares of Common Stock (Par Value...Underwriting Agreement • June 8th, 2006 • NxStage Medical, Inc. • Electromedical & electrotherapeutic apparatus • New York
