Comparison of overexpansion capabilities and thrombogenicity at the side branch ostia after implantation of four different drug eluting stents

Interventions in bifurcation lesions often requires aggressive overexpansion of stent diameter in the setting of long tapering vessel segment. Overhanging struts in front of the side branch (SB) ostium are thought to act as a focal point for thrombi formation and consequently possible stent thrombos...

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Veröffentlicht in:Scientific reports 2020-11, Vol.10 (1), p.20791-20791, Article 20791
Hauptverfasser: Gasior, Pawel, Lu, Shengjie, Ng, Chen Koon Jaryl, Toong, Wee Yee Daniel, Wong, En Hou Philip, Foin, Nicolas, Kedhi, Elvin, Wojakowski, Wojciech, Ang, Hui Ying
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creator Gasior, Pawel
Lu, Shengjie
Ng, Chen Koon Jaryl
Toong, Wee Yee Daniel
Wong, En Hou Philip
Foin, Nicolas
Kedhi, Elvin
Wojakowski, Wojciech
Ang, Hui Ying
description Interventions in bifurcation lesions often requires aggressive overexpansion of stent diameter in the setting of long tapering vessel segment. Overhanging struts in front of the side branch (SB) ostium are thought to act as a focal point for thrombi formation and consequently possible stent thrombosis. This study aimed to evaluate the overexpansion capabilities and thrombogenicity at the SB ostia after implantation of four latest generation drug-eluting stents (DES) in an in-vitro bifurcation model. Four clinically available modern DES were utilized: one bifurcation dedicated DES (Bioss LIM C) and three conventional DES (Ultimaster, Xience Sierra, Biomime). All devices were implanted in bifurcation models with proximal optimization ensuring expansion before perfusing with porcine blood. Optical coherence tomography (OCT), immunofluorescence (IF) and scanning electron microscope analysis were done to determine thrombogenicity and polymer coating integrity at the over-expanded part of the stents. Computational fluid dynamics (CFD) was performed to study the flow disruption. OCT ( p  = 0.113) and IF analysis ( p  = 0.007) demonstrated lowest thrombus area at SB ostia in bifurcation dedicated DES with favorable biomechanical properties compared to conventional DES. The bifurcated DES also resulted in reduced area of high shear rate and maximum shear rate in the CFD analysis. This study demonstrated numerical differences in terms of mechanical properties and acute thrombogenicity at SB ostia between tested devices.
doi_str_mv 10.1038/s41598-020-75836-6
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Overhanging struts in front of the side branch (SB) ostium are thought to act as a focal point for thrombi formation and consequently possible stent thrombosis. This study aimed to evaluate the overexpansion capabilities and thrombogenicity at the SB ostia after implantation of four latest generation drug-eluting stents (DES) in an in-vitro bifurcation model. Four clinically available modern DES were utilized: one bifurcation dedicated DES (Bioss LIM C) and three conventional DES (Ultimaster, Xience Sierra, Biomime). All devices were implanted in bifurcation models with proximal optimization ensuring expansion before perfusing with porcine blood. Optical coherence tomography (OCT), immunofluorescence (IF) and scanning electron microscope analysis were done to determine thrombogenicity and polymer coating integrity at the over-expanded part of the stents. Computational fluid dynamics (CFD) was performed to study the flow disruption. OCT ( p  = 0.113) and IF analysis ( p  = 0.007) demonstrated lowest thrombus area at SB ostia in bifurcation dedicated DES with favorable biomechanical properties compared to conventional DES. The bifurcated DES also resulted in reduced area of high shear rate and maximum shear rate in the CFD analysis. 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OCT ( p  = 0.113) and IF analysis ( p  = 0.007) demonstrated lowest thrombus area at SB ostia in bifurcation dedicated DES with favorable biomechanical properties compared to conventional DES. The bifurcated DES also resulted in reduced area of high shear rate and maximum shear rate in the CFD analysis. This study demonstrated numerical differences in terms of mechanical properties and acute thrombogenicity at SB ostia between tested devices.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>33247219</pmid><doi>10.1038/s41598-020-75836-6</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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subjects 692/4019
692/4019/2776
Angioplasty, Balloon, Coronary - adverse effects
Angioplasty, Balloon, Coronary - instrumentation
Animals
Biomechanical Phenomena
Computer applications
Coronary Stenosis - pathology
Coronary Stenosis - surgery
Coronary Thrombosis - etiology
Coronary Vessels - pathology
Coronary Vessels - surgery
Drug delivery
Drug-Eluting Stents - adverse effects
Fluid dynamics
Fluorescent Antibody Technique
Hemodynamics
Humanities and Social Sciences
Humans
Hydrodynamics
Immunofluorescence
Implants
In Vitro Techniques
Mechanical properties
Microscopy, Electron, Scanning
Models, Cardiovascular
multidisciplinary
Multidisciplinary Sciences
Polymers
Prosthesis Design
Scanning electron microscopy
Science
Science & Technology
Science & Technology - Other Topics
Science (multidisciplinary)
Self Expandable Metallic Stents - adverse effects
Stents
Swine
Thromboembolism
Thrombosis
Thrombosis - etiology
Tomography, Optical Coherence
title Comparison of overexpansion capabilities and thrombogenicity at the side branch ostia after implantation of four different drug eluting stents
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