Bench test and in-vivo evaluation of longitudinal stent deformation during proximal optimisation

While radial stent deformation has been thoroughly investigated, data on longitudinal deformation are scarce.The aim of the study was to describe longitudinal stent deformation associated with the proximal optimisation technique (POT).Longitudinal stent deformation was assessed by bench testing and...

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Bibliographic Details
Main Authors: Tóth Gábor G.
Achim Alexandru
Kafka Marcel
Wu Xinlei
Lunardi Mattia
Biswas Sinjini
Shahzad Atif
Thury Attila
Ruzsa Zoltán
Johnson Thomas W.
Wijns William
Format: Article
Published: 2022
Series:EUROINTERVENTION 18 No. 1
Subjects:
doi:10.4244/EIJ-D-21-00824

mtmt:32612160
Online Access:http://publicatio.bibl.u-szeged.hu/24206
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520 3 |a While radial stent deformation has been thoroughly investigated, data on longitudinal deformation are scarce.The aim of the study was to describe longitudinal stent deformation associated with the proximal optimisation technique (POT).Longitudinal stent deformation was assessed by bench testing and by clinical evaluation. Bench testing was performed in silicone models using 3.00 (n=15) and 3.50 mm (n=14) stent platforms. After deployment, stents were sequentially post-dilated in the proximal main branch up to 5.50 mm, in increments of 0.50 mm, in order to simulate a spectrum of overexpansion. Stent length was redefined by optical coherence tomography (OCT) after each step. Clinical data were collected retrospectively from OCT-guided bifurcation PCI cases.In bench tests, POT has led to significant stent elongation in all cases. The magnitude of elongation was comparable between the 3.00 and the 3.50 mm stent platforms, with 0.86±0.74 mm vs 0.86±0.73 mm, respectively (p=0.71), per 0.5 mm overexpansion. For 3.00 mm stent platform, maximal elongation was 4.31±1.47 mm after up to 5.5 mm overexpansion. For 3.50 mm platform, maximal elongation was 2.87±0.94 mm after up to 5.5 mm overexpansion. Thirty-six clinical cases were analysed, of which 22 (61%) were performed in the distal left main. Post-dilation was performed with 0.98±0.36 mm absolute overexpansion, resulting in 2.22±1.35 mm elongation, as compared to nominal stent length.Overexpansion by POT results in proximal stent elongation. This has to be considered once the stent length is selected and the stent is positioned, especially in the left main stem, where proximal overexpansion is marked and accurate ostial landing is critical. 
650 4 |a Klinikai orvostan 
700 0 1 |a Achim Alexandru  |e aut 
700 0 1 |a Kafka Marcel  |e aut 
700 0 1 |a Wu Xinlei  |e aut 
700 0 1 |a Lunardi Mattia  |e aut 
700 0 1 |a Biswas Sinjini  |e aut 
700 0 1 |a Shahzad Atif  |e aut 
700 0 1 |a Thury Attila  |e aut 
700 0 1 |a Ruzsa Zoltán  |e aut 
700 0 1 |a Johnson Thomas W.  |e aut 
700 0 1 |a Wijns William  |e aut 
856 4 0 |u http://publicatio.bibl.u-szeged.hu/24206/1/Toth2022.pdf  |z Dokumentum-elérés