Clear Catheter Systems Inc. said it raised $3.8 million in an equity round.

The Bend, Ore.-based company’s goal is to raise $4 million from the sale, according to a regulatory filing.

Three unnamed investors participated in the round, according to the filing.

Clear Catheter makes the PleuraFlow active tube-clearance system, which is designed to keep catheters clear while draining blood and other fluids from the chest after heart or lung surgery. The device won CE Mark approval in the European Union in July 2010 and 510(k) clearance from the FDA in December of that year.

The Cleveland Clinic offshoot raised $4 million from venture capital firms like Aphelion Capital and California Technology Ventures in January 2012.