How to close a small PDA?

How Is a Small PDA Closed in Children?

A patent ductus arteriosus (PDA) is a small blood vessel that normally connects two major arteries near the heart—the aorta and the pulmonary artery. In most babies, this passage closes shortly after birth. But in some cases, especially in premature infants, it stays open. The good news? A small PDA often closes on its own within the first few months of life, especially if the baby is otherwise healthy.

When the PDA doesn't close naturally, doctors may recommend a minimally invasive procedure to close it. One of the most common and effective methods involves a cardiac catheterization. Here’s how it works: a thin, flexible tube called a catheter is gently inserted into a blood vessel, usually in the leg, and carefully guided up to the heart and into the PDA.

Through the catheter, a small device—often shaped like a tiny plug or mesh coil—is deployed right into the opening of the PDA. This device acts like a stopper, blocking blood flow through the vessel. Over time, the body’s natural healing process takes over, and tissue grows around the device, permanently sealing the gap.

While every case is different, advancements in catheter-based treatments have made PDA closure safer and less invasive than ever. If your child has been diagnosed with a PDA, talk to your pediatric cardiologist about the best timing and method for closure. Early intervention can prevent complications like heart strain or lung issues down the road.