Identifying the Hemodynamically Significant PDA
Not all PDAs require closure, and careful patient selection remains critical. At Cincinnati Children’s, cardiology and neonatology teams collaborate to assess clinical status alongside echocardiographic markers of hemodynamic significance. Key factors include PDA size, evidence of heart chamber dilation, abnormal blood flow patterns and the infant’s clinical trajectory—particularly prolonged mechanical ventilation, feeding intolerance , abnormal kidney function or poor weight gain.
Infants with hemodynamically significant PDA derive the greatest benefit from device closure. In this population, intervention is associated with earlier respiratory improvement, improved feeding tolerance and more consistent growth compared with conservative management.
Device Closure in the Smallest Patients
Historically, catheter‑based PDA closure was reserved for older infants and children. Advances in device design and catheter technology now allow safe intervention in neonates weighing as little as 750 grams, typically after the first two weeks of life. These minimally invasive procedures avoid thoracotomy and the risks associated with surgical ligation, while providing durable closure.
Devices, most commonly nitinol-made plugs, are delivered via extremely small catheters and confirmed by echocardiography and fluoroscopy. Once endothelialized (covered by tissue), the device becomes incorporated into the vessel wall and does not require replacement as the child grows.
Procedural Course and Recovery
For infants referred from outside NICUs, Cincinnati Children’s prioritizes rapid access to care. Following transfer, PDA closure is typically performed within one to two days. Post‑procedure monitoring includes serial echocardiography and imaging over the first 48 hours, the period with the highest, though still rare, risk of device‑related issues.
Recovery is generally straightforward. Because the procedure does not involve surgical incision, infants experience minimal procedural discomfort. After 48 hours of stability, many patients can return safely to their referring NICU to continue care closer to home, reducing family disruption without compromising outcomes.
Why Volume and Multidisciplinary Care Matter
Cincinnati Children’s cardiac catheterization team has excelled transcatheter device closure of PDA in premature infants for years and is supported by a highly specialized Level IV NICU, experienced anesthesia and transport teams, and a full spectrum of pediatric subspecialty services. This procedural expertise, consistent outcomes and seamless coordination should infants require additional medical or surgical care.
Equally important is the collaborative referral model. Referring neonatologists and cardiologists remain closely involved throughout evaluation, decision‑making and post‑procedure planning. When needed, interventional cardiologists are readily available to speak directly with families before transfer.
When to Refer
Early consultation may be appropriate for premature infants with:
- Persistent PDA and escalating respiratory support
- Feeding intolerance or poor weight gain attributed to shunting
- Echocardiographic findings consistent with hemodynamic significance
- Limited local access to transcatheter closure in very low birth weight infants
Rapid evaluation and timely intervention can shorten prolonged ventilatory courses and support more predictable recovery.
Partnering for Complex Neonatal Cardiac Care
As transcatheter PDA closure becomes standard practice for select premature infants, experience, coordination and speed to care increasingly differentiate outcomes. Cincinnati Children’s continues to advance care through multidisciplinary expertise, high procedural volume and a referral‑friendly model designed to support both patients and referring subspecialists.
To discuss a potential referral or request consultation, please contact the Cincinnati Children’s Heart Institute via the physician referral line at 513-636-4432.
(Published May 2026)
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