Preliminary testing and evaluation of the renata minima stent, an infant stent capable of achieving adult dimensions
Open Access
- 4 May 2021
- journal article
- research article
- Published by Wiley in Catheterization and Cardiovascular Interventions
- Vol. 98 (1), 117-127
- https://doi.org/10.1002/ccd.29706
Abstract
Objectives This study sought to obtain in vivo data on a new stent and delivery system specifically designed for implantation in infants with the ability to be enlarged to adult dimensions. Background There are no endovascular stents designed for or approved for use in infants, nor is there a stent capable of being implanted at infant vessel diameters and achieving adult size while maintaining structural integrity. The Minima stent was designed to address these needs. Methods This study was performed in 6 piglets who underwent implantation of 22 Minima stents into the following locations: aorta (n = 11), branch pulmonary arteries (n = 6), and central veins (n = 5). Results Successful deployment occurred in 21/22 attempts. Two instances of post‐deployment migration occurred. Stents were re‐expanded at 1, 2, 3 and 5 months after implant. All stents regardless of location could be re‐dilated to the intended diameter to keep pace with somatic growth (implant diameter 6.9 +/− 1.2 mm; final diameter 16.1 mm +/− 1.4 mm). Histopathology at 1 and 5 months demonstrated widely patent vessel lumens with stent apposition to vessel wall, early mild inflammatory response surrounding stent struts, typical vascular damage and healing response to acute dilation and a progressive smooth neointimal growth covering stent struts over time. Conclusions In this in vivo study of the Minima stent, there was high implant success, predictable re‐dilatability to adult diameters and favorable histopathology. Further study is warranted.Keywords
This publication has 19 references indexed in Scilit:
- Premounted stents for branch pulmonary artery stenosis in children: A short term solutionCatheterization and Cardiovascular Interventions, 2018
- Early catheterization after initiation of extracorporeal membrane oxygenation support in children is associated with improved survivalCatheterization and Cardiovascular Interventions, 2016
- Transcatheter interventions across fresh suture lines in infants and children: An 8‐year experienceCatheterization and Cardiovascular Interventions, 2015
- The Edwards Valeo lifestents in the treatment and palliation of congenital heart disease in infants and small childrenCatheterization and Cardiovascular Interventions, 2015
- Hybrid aortic reconstruction for treatment of recurrent aortic obstruction after stage 1 single ventricle palliation: Medium term outcomes and results of redilationCatheterization and Cardiovascular Interventions, 2011
- A premounted stent that can be implanted in infants and re‐dilated to 20 mm: Introducing the Edwards Valeo LifestentCatheterization and Cardiovascular Interventions, 2009
- Stent implantation is effective treatment of vascular stenosis in young infants with congenital heart disease: Acute implantation and long‐term follow‐up resultsCatheterization and Cardiovascular Interventions, 2008
- Interventional catheterization performed in the early postoperative period after congenital heart surgery in childrenJournal of Invasive Cardiology, 2004
- Endovascular stents in children under 1 year of age: acute impact and late results.Heart, 1995
- Implantation of balloon-expandable intravascular grafts by catheterization in pulmonary arteries and systemic veins.Journal of the American College of Cardiology, 1988