Patent Ductus Arteriosus (PDA) Occlusion by ADO

What is Patent Ductus Arteriosus?

A patent ductus arteriosus (PDA) is an open vessel that courses between the aorta and the pulmonary artery present in all babies before birth, which helps to distribute oxygen from the mother to the baby's organs and allows blood flow to avoid the lungs. When the baby is born, the lungs expand, their blood vessels relax to accept more flow, and the ductus arteriosus usually closes on its own within the first hours or days of life.
When, the ductus arteriosus does not close on its own, the condition is referred to as a patent (open) ductus arteriosus and is commonly seen in premature babies and sometimes in infants.

What is an ADO?

The AMPLATZER Duct Occluder is a percutaneous, transcatheter occlusion device, intended for the non-surgical closure of patent ductus arteriosus (PDA).It is is a self-expandable device made from a Nitinol wire mesh. As the occluder is implanted, it expands outward and the wires push against the wall of the ductus. Polyester fabric is sewn into the occluder with polyester thread. The fabric induces thrombosis that closes the communication.

How is PDA corrected by occlusion using an ADO?

Transcatheter procedure

  • The transcatheter, a long, thin tube, is inserted into the body, usually in the groin area, and is guided through an artery to the defect.
  • Once the catheter is in place, a tiny device on the tip of the catheter (called an intravascular coil or occluder) is used to block the passageway.


Panel Of Specialist

Dr. Zainal Hamid

Dr. N. Arunachalam
MBBS, FRCS (Edin), AM (Mal)