Case Report: Percutaneous closure of patent ductus arteriosus with the KONAR-MF™ device: initial experience and results at 6 months in a tertiary center - Summary - MDSpire

Case Report: Percutaneous closure of patent ductus arteriosus with the KONAR-MF™ device: initial experience and results at 6 months in a tertiary center

  • By

  • Alex Ismael Catalán Cabrera

  • Mónica Karem Medina Durand

  • Karen del Rosario Condori Alvino

  • Cesar Augusto Puma Laura

  • Norma Maribel Portilla Marroquin

  • June 1, 2026

  • 0 min

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Objective:

To evaluate the clinical and epidemiological characteristics of patients in whom PDA was closed using the off-label KONAR-MF™ device and to report outcomes at 6 months postprocedure, highlighting its significance compared to existing treatments.

Key Findings:
  • Seventeen patients were analyzed with a median age of 1 year and median weight of 11 kg.
  • 58.8% of patients were female, and 58.8% presented with functional class III.
  • Severe pneumonia was the admission reason for 23.5% of patients, and 17.6% had Down syndrome.
  • 47.1% of PDAs were classified as type C, with a median minimum ductal diameter of 5 mm and median ductal length of 8 mm.
  • The median pulmonary artery pressure was 25 mmHg, median fluoroscopy time was 9.7 min, and median radiation dose was 46 mGy/cm2.
  • A residual shunt was detected in 23.5% of patients, resolving in all by 6 months.
  • 11.7% of patients had associated ventricular septal defects.
Interpretation:

The findings suggest that the KONAR-MF™ device may be a valid alternative for PDA closure in complex anatomies or underweight patients, warranting further investigation into its clinical implications.

Limitations:
  • Small sample size limits generalizability.
  • Retrospective design may introduce bias, affecting data accuracy.
Conclusion:

The KONAR-MF™ device shows promise for PDA closure in selected patients, indicating a need for further studies to validate these findings.

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