Ekos Corp. (Bothell, WA) developer of drug delivery catheters leveraging ultrasound technology for peripheral arterial occlusions and administration of contrast media, closed a $5M Series C financing. Participants include ARCH Venture Partners, Bessemer Venture Partners, Merrill Lynch, Mitsui & Co., Spray Venture Partners, MedVenture Associates, Protostar, Technology Partners and Morgan Stanley Venture Partners.