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Sinus Superflex DS© early collapse in systemic arterial duct.

Pedro Betrián-Blasco1, Gerard Marti-Aguasca1, Gemma Giralt-Garcia2

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Two sinus Superflex DS© stents collapsed in a newborn with hypoplastic left heart syndrome. This raises concerns about the stent's radial force for systemic ducts.

Keywords:
Self-expandable stentductal stentinghybrid procedurehypoplastic left heart syndrome

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Area of Science:

  • Cardiology
  • Pediatric Cardiology
  • Medical Device Engineering

Background:

  • Hypoplastic left heart syndrome (HLHS) is a complex congenital heart defect requiring intervention for systemic blood flow.
  • The patent ductus arteriosus (PDA) is critical for systemic circulation in newborns with HLHS.
  • Stent implantation in the PDA is a therapeutic option for HLHS management.

Observation:

  • Two sinus Superflex DS© stents were implanted in a non-stenotic systemic arterial duct in a neonate with HLHS.
  • A significant stent collapse was observed 48 hours post-implantation.
  • The collapsed stent required treatment with a balloon-expandable stent.

Findings:

  • The sinus Superflex DS© stent, designed for systemic ducts, demonstrated collapse under physiological conditions.
  • The radial force of the sinus Superflex DS© stent may be insufficient for maintaining patency in the systemic arterial duct in this context.
  • Secondary stenting with a balloon-expandable stent was successful in restoring ductal patency.

Implications:

  • The findings question the suitability of the sinus Superflex DS© stent for systemic ductal applications in neonates with HLHS.
  • Further investigation into the radial force and long-term performance of this stent in pediatric cardiovascular interventions is warranted.
  • This case highlights the importance of device selection and monitoring in complex congenital heart disease interventions.