Redwood City-based Emphasys Medical has filed for an IPO, saying in a filing with the SEC Friday that it is looking to raise up to $86.25M in an IPO on the NASDAQ Global Market. Emphasys said that it is looking to trade as "EMPH" on the exchange. The firm's IPO is being underwritten by Morgan Stanley, Thomas Weisel Partners, Leerink Swann, and Canaccord Adams. Emphasys Medical is venture backed by ABS Ventures, Advanced Technology Ventures, OrbiMed, Cargill Inc, Morgan Stanley Venture Partners, Morgenthaler Partners, SPVC, and others. Emphasys develops medical devices for treating emphysema.