The Canine Duct Occluder (ACDO) is a self-expanding device made from a Nitinol wire mesh and is used to close patent ductus arteriosus (PDA) in dogs. A distal flat disk on the pulmonary artery side of the ductal ostium provides secure positioning in the pulmonary artery. As the device is implanted, the proximal cupped disk expands to conform to the shape of the ductal ampulla. The waist of the device spans the pulmonic ostium of the ductus and the dense nitinol mesh occludes the communication.
The device is available in several waist diameters as listed in the Sizes tab. The device should be sized relative to the true diameter of the pulmonic ostium of the ductus as measured by arteriography in a ratio between 1.5 and 2. Appropriate sizing is crucial to the success of the procedure and can be accomplished only by arteriography.