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https://www.readbyqxmd.com/read/28329198/long-term-serial-non-invasive-multislice-computed-tomography-angiography-with-functional-evaluation-after-coronary-implantation-of-a-bioresorbable-everolimus-eluting-scaffold-the-absorb-cohort-b-msct-substudy
#1
Yoshinobu Onuma, Carlos Collet, Robert-Jan van Geuns, Bernard de Bruyne, Evald Christiansen, Jacques Koolen, Pieter Smits, Bernard Chevalier, Dougal McClean, Dariusz Dudek, Stephan Windecker, Ian Meredith, Koen Nieman, Susan Veldhof, John Ormiston, Patrick W Serruys
Aims: Multimodality invasive imaging of the first-in-man cohort demonstrated at 5 years stable lumen dimensions and a low rate of major adverse cardiac events (MACE). However, the long-term non-invasive assessment of this device remains to be documented. The objective was to describe the 72-month multislice computed tomography (MSCT) angiographic and functional findings after the implantation of the second iteration of the fully resorbable everolimus-eluting polymeric scaffold. Methods and results: In the ABSORB Cohort B trial patients with non-complex de novo lesions were treated with second iteration bioresobable vascular scaffold (BVS)...
March 16, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28329070/paclitaxel-crystals-on-the-surface-of-a-bioresorbable-vascular-scaffold-visualized-by-optical-coherence-tomography-after-drug-eluting-balloon-angioplasty
#2
María López-Benito, Armando Pérez de Prado, Carlos Cuellas, Rodrigo Estévez, Felipe Fernández-Vázquez
No abstract text is available yet for this article.
February 27, 2017: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28320687/12-months-outcomes-after-bioresorbable-vascular-scaffold-implantation-in-patients-with-acute-coronary-syndromes-data-from-the-european-multicentre-ghost-eu-extended-registry
#3
Boris Schnorbus, Jens Wiebe, Davide Capodanno, Salvatore Brugaletta, Salvatore Geraci, Julinda Mehilli, Azeem Latib, Maciej Lesiak, Christoph Jensen, Alessio Mattesini, Thomas Münzel, Piera Capranzano, Carlo Di Mario, Christoph Naber, Aleksander Araszkiewicz, Antonio Colombo, Giuseppe Caramanno, Manel Sabate, Corrado Tamburino, Holger Nef, Tommaso Gori
AIMS: We report on the mid-term outcomes of patients undergoing percutaneous coronary intervention with bioresorbable vascular scaffolds (BVS) for the treatment of acute coronary syndromes (ACS) and compare with those of patients with stable coronary artery disease (sCAD). METHODS AND RESULTS: 1477 patients underwent implantation of one or more BVS (Absorb BVS; Abbott Vascular, Santa Clara, CA, USA) at 11 European centers and were included in the GHOST-EU registry...
March 21, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28317791/neoatherosclerosis-an-emerging-and-conceptually-unexpected-cause-of-very-late-bioresorbable-vascular-scaffold-failure
#4
Nick Hiltrop, Walter Desmet, Tom Adriaenssens, Johan Bennett
No abstract text is available yet for this article.
March 20, 2017: EuroIntervention
https://www.readbyqxmd.com/read/28315815/self-assembled-photoadditives-in-polyester-films-allow-stop-and-go-chemical-release
#5
Ting Cheng, Richard O'Rorke, Raphael Francois Ortiz, Tay Yee Yan, Eva Hemmer, Fiorenzo Vetrone, Robert S Marks, Terry W J Steele
Near-infrared (NIR) triggered chemical delivery allows on-demand release with the advantage of external tissue stimulation. Bioresorbable polyester poly-L-lactic acid (PLLA) was compounded with photoadditives of neat zinc oxide (ZnO) nanoparticles and 980 → 365 nm LiYF4:Tm(3+), Yb(3+) upconverting nanoparticles (UCNP). Subsequently, neat ZnO and UCNP blended PLLA films of sub-50 μm thickness were knife casted with a hydrophobic small molecule drug mimic, fluorescein diacetate. The PLLA films displayed a 500 times increase in fluorescein diacetate release from the 50 mW NIR irradiated PLLA/photoadditive film compared to non-irradiated PLLA control films...
March 15, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28315492/long-term-in-vivo-corrosion-behavior-biocompatibility-and-bioresorption-mechanism-of-a-bioresorbable-nitrided-iron-scaffold
#6
Wenjiao Lin, Li Qin, Haiping Qi, Deyuan Zhang, Gui Zhang, Runlin Gao, Hong Qiu, Ying Xia, Ping Cao, Xiang Wang, Wei Zheng
Pure iron as a potential bioresorbable material for bioresorbable coronary scaffold has major disadvantages of slow corrosion and bioresorption. However, so far, there are neither quantitative data of long-term in vivo corrosion nor direct experimental evidence for bioresorption of pure iron and its alloys, which are fundamental and vital for developing novel Fe-based alloys overcoming the intrinsic drawbacks of pure iron. This work systemically investigated scaffold performance, long-term in vivo corrosion behavior and biocompatibility of a nitrided iron coronary scaffold and explored its bioresorption mechanism...
March 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28314675/a-hybrid-strategy-with-bioresorbable-vascular-scaffolds-and-drug-eluting-stents-for-treating-complex-coronary-lesions
#7
Richard J Jabbour, Alfonso Ielasi, Akihito Tanaka, Massimo Leoncini, Bernado Cortese, Giulietta Grigis, Satoru Mitomo, Damiano Regazzoli, Gaetano Di Palma, Claudio Rapetto, Maurizio Tespili, Antonio Colombo, Azeem Latib
BACKGROUND: Due to the inherent limitations of current generation BVSs, complex coronary artery disease often contains BVS unsuitable segments. Our aim was to assess the feasibility of a hybrid approach using bioresorbable vascular scaffolds (BVSs) and drug-eluting stents (DESs) for the treatment of complex coronary artery lesions not suitable for a scaffolding only approach. METHODS: A retrospective multicenter cohort analysis was performed on patients with complex de novo or in-stent restenosis lesions treated with a hybrid BVS (Absorb BVS, Abbott Vascular, Santa Clara, CA) and DES strategy...
March 8, 2017: Cardiovascular Revascularization Medicine: Including Molecular Interventions
https://www.readbyqxmd.com/read/28299676/bioresorbable-scaffolds-for-coronary-stenosis-when-and-how-based-upon-current-studies
#8
REVIEW
Alexandre Abizaid, J Ribamar Costa
PURPOSE OF REVIEW: First-generation bioresorbable scaffolds (BRS), largely represented by the poly-l-lactic acid (PLLA) ABSORB (Abbott Vascular, Temecula, Illinois, US), have demonstrated, in low to moderate lesion complexity, similar efficacy to current generation metallic drug-eluting stents. However, a trend toward more device thrombosis has been observed, especially when the scaffolds are used in off-label situations. In this review, we address the most relevant drawbacks of these devices and, based on the available scientific data, we visit the scenarios where there is more uncertainty about their indication, trying to identify the lesions/patients to whom this technology should be voided at its current stage of development...
March 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28295999/fracture-with-the-newer-bioresorbable-vascular-scaffolds
#9
Mostafa Elwany, Gaetano Di Palma, Bernardo Cortese
Bioresorbable vascular scaffolds (BVS) are being increasingly used in complex, real-world lesions. The possibility of strut fractures is a rare entity with the use of drug eluting stents (DES), but has not yet been adequately described for the BVS technology. In this report, we present a case of scaffold fracture of DEsolve BVS (Elixir Medical Corporation, USA) that was diagnosed both angiographically and by optical coherence tomography(OCT). Scaffold fracture with the newer BVS is a new Achilles' heel in the BVS technology...
March 15, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28293518/the-use-of-a-hyaluronic-acid-carboxymethylcellulose-membrane-as-an-adhesion-barrier-during-nipple-delay-before-nipple-preserving-mastectomy
#10
Andreas M Lamelas, Eric M Jablonka, Marco A Harmaty, Philip J Torina
The desire for nipple-preserving mastectomies has increased over the past decade as studies have proven that the procedure has comparable oncologic risk as a traditional mastectomy in both therapeutic and prophylactic cases. Partial or complete nipple necrosis is a well-known complication of this procedure with rates in the literature ranging between 1% and 9%. In high-risk patients, surgeons are performing a delay procedure before the mastectomy to help improve nipple vascularity and decrease necrosis rates...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28291900/study-of-mesenchymal-stem-cells-cultured-on-a-poly-lactic-co-glycolic-acid-scaffold-containing-simvastatin-for-bone-healing
#11
Dario Mendes Junior, Juliana A Domingues, Moema A Hausen, Silvia M M Cattani, Aguedo Aragones, Alexandre L R Oliveira, Rodrigo F Inácio, Maria L P Barbo, Eliana A R Duek
BACKGROUND: Tissue engineering is a promising alternative for the development of bone substitutes; for this purpose, three things are necessary: stem cells, a scaffold to allow tissue growth and factors that induce tissue regeneration. METHODS: To congregate such efforts, we used the bioresorbable and biocompatible polymer poly(lactic-co-glycolic acid) (PLGA) as scaffold. For the osteoinductive factor, we used simvastatin (SIM), a drug with a pleiotropic effect on bone growth...
March 8, 2017: Journal of Applied Biomaterials & Functional Materials
https://www.readbyqxmd.com/read/28287223/bioresorbable-polypeptide-based-comb-polymers-efficiently-improves-the-stability-and-pharmacokinetics-of-proteins-in-vivo
#12
Md Hasan Turabee, Thavasyappan Thambi, Jae Seung Lym, Doo Sung Lee
Stimuli-responsive polypeptides are a promising class of biomaterials due to their tunable physicochemical and biological properties. Herein, a series of novel pH- and thermo-responsive block copolymers based on polypeptides were synthesized by ring-opening polymerization of γ-benzyl-l-glutamate-N-carboxyanhydride in the presence of poly(ethylene glycol)-diamine macroinitiator followed by aminolysis. The resulting polypeptide-based triblock copolymer, poly[(2-(dibutylamino)ethyl-l-glutamate)-co-(γ-benzyl-l-glutamate)]-poly(ethylene glycol)-b-poly[(2-(dibutylamino)ethyl-l-glutamate)-co-(γ-benzyl-l-glutamate)] (PNLG-co-PBLG-b-PEG-b-PBLG-co-PNLG), exists as a low viscous sol at low pH and temperature (≤pH 6...
March 13, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28285939/restenosis-of-coronary-bioresorbable-vascular-scaffolds
#13
Fernando Alfonso, Marcos García-Guimaraes
No abstract text is available yet for this article.
March 9, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28280451/effects-of-terminal-sterilization-on-peg-based-bioresorbable-polymers-used-in-biomedical-applications
#14
Divya Bhatnagar, Koustubh Dube, Vinod B Damodaran, Ganesan Subramanian, Kenneth Aston, Frederick Halperin, Meiyu Mao, Kurt Pricer, N Sanjeeva Murthy, Joachim Kohn
The effects of ethylene oxide (EO), vaporized hydrogen peroxide (VHP), gamma (γ) radiation, and electron-beam (E-beam) on the physiochemical and morphological properties of medical device polymers are investigated. Polymers with ether, carbonate, carboxylic acid, amide and ester functionalities are selected from a family of poly(ethylene glycol) (PEG) containing tyrosine-derived polycarbonates (TyrPCs) to include slow, medium, fast, and ultrafast degrading polymers. Poly(lactic acid) (PLA) is used for comparison...
October 2016: Macromolecular Materials and Engineering
https://www.readbyqxmd.com/read/28279311/antiplatelet-therapy-after-implantation-of%C3%A2-bioresorbable-vascular-scaffolds-a-review-of-the-published-data-practical-recommendations-and%C3%A2-future-directions
#15
REVIEW
Davide Capodanno, Dominick J Angiolillo
The introduction of bioresorbable vascular scaffolds (BVS) for clinical use has raised a number of questions on whether current dual-antiplatelet therapy (DAPT) recommendations after drug-eluting stent (DES) implantation, mostly deriving from data on second-generation DES, are also applicable to this completely different technology. This article aims to review the technical shortcomings of BVS-the most extensively studied fully bioresorbable coronary stent-and its contemporary rates of scaffold thrombosis, with a focus on recommendations for DAPT duration...
March 13, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28275974/early-disarticulation-of-a-bioresorbable-vascular-scaffold-an-underreported-consequence-of-repeat-imaging
#16
Joel P Giblett, Adam J Brown, Stephen P Hoole, Nick E J West
No abstract text is available yet for this article.
March 8, 2017: Cardiovascular Intervention and Therapeutics
https://www.readbyqxmd.com/read/28275942/bioresorbable-polymers-and-stent-devices
#17
REVIEW
Payam Dehghani
Percutaneous coronary interventions will never become obsolete, as evolution is inherent to interventional cardiology. Current drug-eluting platforms have appreciably improved their safety and efficacy profiles in different clinical settings compared to first-generation devices such that it is difficult to consider other alternatives. However, there is definite biological plausibility to consider devices with bioabsorbable polymers and/or scaffolds. It is also an undeniable fact that many patients, based on variety of belief systems, would prefer not to have a permanently implanted device...
February 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28268550/surgical-fiducial-segmentation-and-tracking-for-pose-estimation-based-on-ultrasound-b-mode-images
#18
Lei Chen, Nathanael Kuo, Fereshteh Aalamifar, David Narrow, Devin Coon, Jerry Prince, Emad M Boctor
Doppler ultrasound is a non-invasive diagnostic tool for the quantitative measurement of blood flow. However, given that it provides velocity data that is dependent on the location and angle of measurement, repeat measurements to detect problems over time may require an expert to return to the same location. We therefore developed an image-guidance system based on ultrasound B-mode images that enables an inexperienced user to position the ultrasound probe at the same site repeatedly in order to acquire a comparable time series of Doppler readings...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28266206/characterization-of-calcium-phosphate-nanoparticles-based-on-a-pegylated-chelator-for-gene-delivery
#19
Xiangang Huang, Diana Andina, Jingshui Ge, Anne Labarre, Jean-Christophe Leroux, Bastien Castagner
Calcium phosphate (CaP) nanoparticles are promising gene delivery carriers due to their bioresorbability, ease of preparation, high gene loading efficacy, and endosomal escape properties. However, the rapid aggregation of the particles needs to be addressed in order to have potential in vivo. In addition, there is a need to better understand the relationship between CaP nanoparticle properties and their interactions with cells. Here, a new synthesis route involving click chemistry was developed to prepare the PEGylated chelator PEG-inositol 1,3,4,5,6-pentakisphosphate (PEG-IP5) that can coat and stabilize CaP nanoparticles...
March 14, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28262625/is-quantitative-coronary-angiography-reliable-in-assessing-the-late-lumen-loss-of-the-everolimus-eluting-bioresorbable-polylactide-scaffold-in-comparison-with-the-cobalt-chromium-metallic-stent
#20
Yohei Sotomi, Yoshinobu Onuma, Yosuke Miyazaki, Taku Asano, Yuki Katagiri, Erhan Tenekecioglu, Hans Jonker, Jouke Dijkstra, Robbert J de Winter, Joanna J Wykrzykowska, Gregg W Stone, Jeffrey J Popma, Ken Kozuma, Kengo Tanabe, Patrick W Serruys, Takeshi Kimura
AIMS: Immediately after stent/scaffold implantation, quantitative coronary angiography (QCA) with respect to optical coherence tomography (OCT) more severely underestimates the lumen diameter (LD) in Absorb than in XIENCE. This OCT-QCA discrepancy has not been evaluated at long-term follow-up. The present study aimed to assess the accuracy of QCA with reference to OCT in Absorb as compared to XIENCE. METHODS AND RESULTS: We assessed 2-year QCA and OCT in the ABSORB Japan randomized trial (Absorb n=87, XIENCE n=44)...
March 7, 2017: EuroIntervention
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