PDA Iowa score Calculator
If you are looking to estimate significance of the left to right PDA - one of the most used score has been the Iowa PDA score. Here is the calculator below. A value ≥ 6 is considered indicating echocardiographic signs of hemodynamics significance.
Important references / publications outlining the score:
Rios DR, Martins FF, El-Khuffash A, Weisz DE, Giesinger RE, McNamara PJ. Early Role of the Atrial-Level Communication in Premature Infants with Patent Ductus Arteriosus. J Am Soc Echocardiogr. 2021 Apr;34(4):423-432.e1. doi: 10.1016/j.echo.2020.11.008. Epub 2020 Nov 20. PMID: 33227390; PMCID: PMC8026594.
Giesinger RE, Hobson AA, Bischoff AR, Klein JM, McNamara PJ. Impact of early screening echocardiography and targeted PDA treatment on neonatal outcomes in "22-23" week and "24-26" infants. Semin Perinatol. 2023 Mar 5:151721. doi: 10.1016/j.semperi.2023.151721. Epub ahead of print. PMID: 36882362.
Of note, according to this publication, the authors will use Acetaminophen as their primary intention for acceleration of ductal closure. Followed by NSAIDs if remains significant.
Pulmonary vein D wave
Mitral E wave
Isovolumetric relaxation time
Doppler flow reversal
Significant retrograde flow in diastole (middle cerebral artery) in an infant with a large ductus arteriosus (left to right) and diastolic steal.
Retrograde holodiastolic flow in the post-ductal descending aorta by PW Doppler from the suprasternal view.
Retrograde holodiastolic flow in the post-ductal descending aorta by PW Doppler from the subcostal view.
Retrograde holodiastolic flow in the celiac artery by PW Doppler from the subcostal view.
Retrograde holodiastolic flow in the anterior cerebral artery by PW Doppler from the transfontanelar view.
Retrograde holodiastolic flow in the middle cerebral artery by PW Doppler from the transfontanelar view.