Press Release March 08, 2006

Atritech Announces Completion of $22.5 Million Equity Financing

BOSTON, March 8, 2006 — Atritech, Inc., a clinical stage medical device company, has completed a $22.5 million round of financing.  It is the largest venture capital raise in the Minnesota medical device industry in the last 20 months. Prism Venture Partners led the round and substantial commitments were received from the existing investors and Tullis-Dickerson, a new investor.

Goodwin Procter LLP attorneys Lawrence Wittenberg and Gerhard Lubitz represented Prism Venture Partners in this transaction.