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Biodegradable stents

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https://www.readbyqxmd.com/read/28716610/current-status-and-future-direction-of-biodegradable-metallic-and-polymeric-vascular-scaffolds-for-next-generation-stents
#1
REVIEW
Seung Hyuk Im, Youngmee Jung, Soo Hyun Kim
Because of the increasing incidence of coronary artery disease, the importance of cardiovascular stents has continuously increased as a treatment of this disease. Biodegradable scaffolds fabricated from polymers and metals have emerged as promising materials for vascular stents because of their biodegradability. Although such stent framework materials have shown good clinical efficacy, it is difficult to decide whether polymers or metals are better vascular scaffolds because their properties are different. Therefore, there are still obstacles in the development of biodegradable vascular scaffolds in terms of improving clinical efficacy...
July 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28700502/adverse-cardiovascular-events-associated-with-biodegradable-polymer-drug-eluting-stents-and-durable-polymer-everolimus-eluting-stents-a-systematic-review-and-meta-analysis-of-10-randomized-controlled-trials
#2
REVIEW
Pravesh Kumar Bundhun, Girish Janoo, Chandra Mouli Yanamala, Feng Huang
BACKGROUND: Controversies have been observed among network meta-analyses comparing biodegradable polymer drug-eluting stents (BP-DES) with durable polymer drug-eluting stents (DP-DES). We aimed to compare the adverse cardiovascular events associated with BP-DES and durable polymer everolimus-eluting stents (DP-EES) using a large number of patients obtained from randomized controlled trials (RCTs). METHODS: Electronic databases were searched for randomized trials comparing BP-DES with DP-EES...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28690770/utility-of-the-balloon-overtube-assisted-modified-over-the-wire-stenting-technique-to-treat-post-sleeve-gastrectomy-complications
#3
Ana Ponte, Rolando Pinho, Luísa Proença, Joana Silva, Jaime Rodrigues, Mafalda Sousa, João Carlos Silva, João Carvalho
AIM: To describe a modified technique of deployment of stents using the overtube developed for balloon-assisted enteroscopy in post-sleeve gastrectomy (SG) complications. METHODS: Between January 2010 and December 2015, all patients submitted to an endoscopic stenting procedure to treat a post-SG stenosis or leakage were retrospectively collected. Procedures from patients in which the stent was deployed using the balloon-overtube-assisted modified over-the-wire (OTW) stenting technique were described...
June 16, 2017: World Journal of Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28675279/-benign-esophageal-strictures-endoscopic-treatment-options
#4
Michael Drepper, Philippe Bichard, Jean-Louis Frossard
Bening strictures of the esophagus are a frequently encountered problem in endoscopy. Dilation by Savary-Gilliard dilators or balloon dilators is the first line treatment and relieves dysphagia in about 75 % of cases. Complex strictures are at higher risk of treatment failure than simple ones and are considered as refractory after repetitive unsuccessful dilations. Adjunction of locally injected corticoids favors outcome in strictures of peptic origin. Further treatment options of refractory strictures are endoscopic incision therapy in short ones and temporary self expandable metallic (SEMS), plastic (SEPS) or biodegradable stent insertion in complex ones...
August 31, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28664637/author-s-response-endoscopic-biodegradable-biliary-stents-in-the-treatment-of-benign-biliary-strictures-the-first-report-in-clinical-use-in-patients-antti-siiki-irina-rinta-kiikka-and-johanna-laukkarinen
#5
Antti Siiki, Irina Rinta-Kiikka, Johanna Laukkarinen
We appreciate the comments of Dr. Koksal and co-workers on our recent article. In brief, we reported on two first patients with benign biliary strictures treated with self-expanding poly-dioxanone biodegradable biliary stents (BDBS) inserted in endoscopic retrograde cholangiography (ERC). The authors underline that BDBS may cause epithelial hyperplasia in the bile duct similarly to oesophageal use. This article is protected by copyright. All rights reserved.
June 30, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28647315/safety-and-efficacy-of-new-biodegradable-polymer-based-sirolimus-eluting-stents-in-a-preclinical-model
#6
Armando Pérez de Prado, Claudia Pérez Martínez, Carlos Cuellas Ramón, Marta Regueiro Purriños, María López Benito, José Manuel Gonzalo Orden, José Antonio Rodríguez Altónaga, Rodrigo Estévez Loureiro, Tomás Benito González, David Viñuela Baragaño, María Molina Crisol, Marc Amorós Aguilar, Isabel Pérez Serranos, Arnau Vidal Parreu, Ana Benavides Montegordo, Luis Duocastella Codina, Felipe Fernández Vázquez
INTRODUCTION AND OBJECTIVES: New drug-eluting stents (DES) designed to overcome the limitations of existing devices should initially be tested in preclinical studies. Our objective was to analyze the safety and efficacy of new biodegradable polymer-based DES compared with bare-metal stents (BMS) and commercially available DES in a model of normal porcine coronary arteries. METHODS: We randomly implanted 101 stents (BMS and biodegradable polymer-based sirolimus-eluting stents: 3 test stent iterations [BD1, BD2, and BD3], Orsiro, Biomime and Biomatrix) in the coronary arteries of 34 domestic pigs...
June 21, 2017: Revista Española de Cardiología
https://www.readbyqxmd.com/read/28641838/dual-antiplatelet-therapy-for-6-versus-18%C3%A2-months-after-biodegradable-polymer-drug-eluting-stent-implantation
#7
Masato Nakamura, Raisuke Iijima, Junya Ako, Toshiro Shinke, Hisayuki Okada, Yoshiaki Ito, Kenji Ando, Hitoshi Anzai, Hiroyuki Tanaka, Yasunori Ueda, Shin Takiuchi, Yasunori Nishida, Hiroshi Ohira, Katsuhiro Kawaguchi, Makoto Kadotani, Hiroyuki Niinuma, Kazuto Omiya, Takashi Morita, Kan Zen, Yoshinori Yasaka, Kenji Inoue, Sugao Ishiwata, Masahiko Ochiai, Toshimitsu Hamasaki, Hiroyoshi Yokoi
OBJECTIVES: The NIPPON (Nobori Dual Antiplatelet Therapy as Appropriate Duration) study was a multicenter randomized investigation of the noninferiority of short-term versus long-term dual antiplatelet therapy (DAPT) in patients with implantation of the Nobori drug-eluting stent (DES) (Terumo, Tokyo, Japan), which has a biodegradable abluminal coating. BACKGROUND: The optimum duration of DAPT for patients with a biodegradable polymer-coated DES is unclear. METHODS: The subjects were 3,773 patients with stable or acute coronary syndromes undergoing Nobori stent implantation...
June 26, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28636091/biodegradable-stents-in-the-treatment-of-benign-biliary-strictures-does-one-size-fit-all
#8
Aydin Seref Koksal, Ahmet Tarik Eminler, Erkan Parlak
We read the article entitled 'Endoscopic biodegradable biliary stents in the treatment of benign biliary strictures: First report on clinical use in patients' by Siiki et al with great interest (1). The authors successfully treated two patients with benign biliary strictures, possibly due to choledocholithiasis, with endoscopic insertion of polydioxanone biodegradable biliary stents. They reported that the treatment was uneventful and the stents were completely dissolved between 3 and 6 months without leaving a sequela in the bile ducts...
June 21, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28616399/management-of-strictures-after-endoscopic-submucosal-dissection-for-superficial-esophageal-cancer
#9
REVIEW
Koichiro Kawaguchi, Hiroki Kurumi, Yohei Takeda, Kazuo Yashima, Hajime Isomoto
Endoscopic resection of early esophageal cancer has a high therapeutic effect while being minimally invasive. Especially, the establishment of the endoscopic submucosal dissection (ESD) procedure has made it possible to resect large lesions in an en-bloc manner. As a result, accurate pathology evaluation became possible, and the risk of local recurrence was extremely low. On the other hand, esophageal strictures after endoscopic treatment of an extensive circumferential lesion are a potential problem. Previously, for the prevention and treatment of esophageal strictures, patients had to undergo painful endoscopic balloon dilation (EBD) many times...
April 2017: Annals of Translational Medicine
https://www.readbyqxmd.com/read/28597804/effect-of-biodegradable-polymer-drug-eluting-stents-versus-biocompatible-polymer-everolimus-eluting-stents-a-meta-analysis
#10
Yong-Zhi Shang, Bao-Yin Li, Yan Feng, Jie-Yun Liu, Xiu-Ling Yang, Lei Qin
OBJECTIVE: Biocompatible polymer everolimus-eluting stents (EES) are associated with risk of stent thrombosis (ST); biodegradable polymer drug-eluting stents (BP-DES) were designed to reduce these risks. However, the long-term benefits are not completely clear. METHOD: We undertook a meta-analysis of randomized studies identified in systematic searches of MEDLINE, EMBASE, and the Cochrane Database. Primary outcome was the risk of ST. RESULTS: Twelve studies (11,692 patients) were included...
April 2017: Acta Cardiologica
https://www.readbyqxmd.com/read/28593785/endoscopically-placed-stents-a-useful-alternative-for-the-management-of-refractory-benign-cervical-esophageal-stenosis
#11
Óscar Nogales, Ana Clemente, Aránzazu Caballero-Marcos, Javier García-Lledó, Leticia Pérez-Carazo, Beatriz Merino, María López-Ibáñez, María Dolores Pérez Valderas, Rafael Bañares, Cecilia González-Asanza
INTRODUCTION: Benign esophageal strictures are relatively frequent and can severely affect the quality of life of a patient. Stenting has been proposed for the treatment of refractory cases. Lesions affecting the cervical esophagus are more difficult to treat, and the placement of stents in this location has traditionally been restricted due to potential adverse events. The aim of this study was to describe the efficacy and safety of endoscopic stenting in the management of refractory benign cervical esophageal strictures (RBCES) in a single-center cohort study...
July 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28589916/design-and-fabrication-of-novel-polymeric-biodegradable-stents-for-small-caliber-blood-vessels-by-computer-aided-wet-spinning
#12
D Puppi, A Pirosa, G Lupi, P A Erba, G Giachi, F Chiellini
Biodegradable stents have emerged as one of the most promising approaches in obstructive cardiovascular disease treatment due to their potential in providing mechanical support while it is needed and then leaving behind only the healed natural vessel. The aim of this study was to develop polymeric biodegradable stents for application in small caliber blood vessels. Poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoate] (PHBHHx), a renewable microbial aliphatic polyester, and poly(ε-caprolactone), a synthetic polyester approved by the US Food and Drug Administration for different biomedical applications, were investigated as suitable polymers for stent development...
June 7, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28579236/biodegradable-polymer-biolimus-eluting-stents-versus-durable-polymer-everolimus-eluting-stents-in-patients-with%C3%A2-coronary-artery-disease-final-5-year-report-from-the-compare-ii-trial-abluminal%C3%A2-biodegradable-polymer-biolimus-eluting-stent-versus-durable-polymer
#13
Georgios J Vlachojannis, Pieter C Smits, Sjoerd H Hofma, Mario Togni, Nicolás Vázquez, Mariano Valdés, Vassilis Voudris, Ton Slagboom, Jean-Jaques Goy, Peter den Heijer, Martin van der Ent
OBJECTIVES: This analysis investigates the 5-year outcomes of the biodegradable polymer biolimus-eluting stent (BP-BES) and durable polymer everolimus-eluting stent (DP-EES) in an all-comers population undergoing percutaneous coronary intervention. BACKGROUND: Recent 1- and 3-year results from randomized trials have indicated similar safety and efficacy outcomes of BP-BES and DP-EES. Whether benefits of the biodegradable polymer device arise over longer follow-up is unknown...
May 24, 2017: JACC. Cardiovascular Interventions
https://www.readbyqxmd.com/read/28576000/the-effect-of-solvents-and-hydrophilic-additive-on-stable-coating-and-controllable-sirolimus-release-system-for-drug-eluting-stent
#14
Seong Min Kim, Sung-Bin Park, Tarek M Bedair, Man-Ho Kim, Bang Ju Park, Yoon Ki Joung, Dong Keun Han
Various drug-eluting stents (DESs) have been developed to prevent restenosis after stent implantation. However, DES still needs to improve the drug-in-polymer coating stability and control of drug release for effective clinical treatment. In this study, the cobalt-chromium (CoCr) alloy surface was coated with biodegradable poly(D,L-lactide) (PDLLA) and sirolimus (SRL) mixed with hydrophilic Pluronic F127 additive by using ultrasonic spray coating system in order to achieve a stable coating surface and control SRL release...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28570687/intervention-using-a-novel-biodegradable-hollow-stent-containing-polylactic-acid-polyprolactone-polyethylene-glycol-complexes-against-lacrimal-duct-obstruction-disease
#15
Xinyuan Zhan, Xin Guo, Rong Liu, Weikun Hu, Lei Zhang, Nan Xiang
Lacrimal duct obstruction disease (LDOD) is a common ophthalmologic disease. Stent implantation surgery is one of the most effective therapies. In this study, we intended to find out the satisfactory biodegradable stents containing poly-L-lactic acid-polycaprolactone-polyethylene glycol (PLLA- PCL- PEG) complexes for therapeutic application in LDOD. Stents made of PLLA- PCL- PEG complexes in various ratios, were prepared and used in vitro to determine stents with appropriate mechanical properties and shorter range of bio-degradation for study in vivo...
2017: PloS One
https://www.readbyqxmd.com/read/28544186/safety-and-efficacy-outcomes-of-3rd-generation-des-in-an-all-comer-population-of-patients-undergoing-pci-12-month-and-24-month-results-of-the-e-biomatrix-french-registry
#16
Eric Maupas, Janusz Lipiecki, Raphy Levy, Benjamin Faurie, Bernard Karsenty, Marc Eric Moulichon, François Brunelle, Luc Maillard, Fabien de Poli, Thierry Lefèvre
OBJECTIVES: The French Ebiomatrix registry aimed to confirm the results of the Leaders trial in an all-comer population in France. BACKGROUND: The Leaders trial showed the Biolimus-eluting-sent (BES) to be equivalent to the Cypher stent in terms of safety and efficacy at 1 year and superior regarding stent thrombosis after 1 year. METHODS: BES recipients were enrolled in 42 French centers with up to 24-month clinical follow up. RESULTS: 2365 patients were included...
May 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28544146/real-life-clinical-outcomes-with-everolimus-eluting-platinum-chromium-stent-with-an-abluminal-biodegradable-polymer-in-patients-from-the-swedish-coronary-angiography-and-angioplasty-registry-scaar
#17
Giovanna Sarno, Bo Lagerqvist, Göran Olivecrona, Christoph Varenhorst, Mikael Danielewicz, Kristina Hambraeus, Daniel Lindholm, Truls Råmunddal, Nils Witt, Stefan James
BACKGROUND: No previous studies have evaluated the performance of the Synergy stent in a large real-life population. OBJECTIVES: To describe the initial real-life experience with a novel everolimus eluting platinum chromium stent with abluminal biodegradable polymer (SYNERGY) in unselected patients from a nationwide registry. METHODS: All implanted Synergy stents were compared with other new generation drug eluting stents (n-DES) with >1,000 implantations in Sweden between March 2013 and October 2015...
May 22, 2017: Catheterization and Cardiovascular Interventions
https://www.readbyqxmd.com/read/28536015/two-year-vascular-responses-to-drug-eluting-stents-with-biodegradable-polymer-versus-durable-polymer-an-optical-coherence-tomography-sub-study-of-the-next
#18
Yosuke Katayama, Takashi Kubo, Takashi Akasaka, Yasushi Ino, Kazuo Kimura, Hiroyuki Okura, Toshiro Shinke, Keiichi Igarashi, Kazushige Kadota, Ken Kozuma, Kengo Tanabe, Yoshihisa Nakagawa, Toshiya Muramatsu, Yoshihiro Morino, Takeshi Kimura
BACKGROUND: This study aimed to compare very late vascular response after stent implantation between everolimus-eluting stent (EES) with a thin, non-adhesive, durable, biocompatible fluorinated polymer and biolimus-eluting stent (BES) with a biodegradable polymer by optical coherence tomography (OCT). METHODS AND RESULTS: In the NOBORI-BES Versus XIENCE V/PROMUS-EES Trial (NEXT), a formal OCT substudy investigated 48 patients (27 EES-treated lesions in 23 patients and 28 BES-treated lesions in 25 patients) with 2-year (18-30 months) follow-up imaging at 18 centers...
May 20, 2017: Journal of Cardiology
https://www.readbyqxmd.com/read/28531993/fabrication-mechanical-properties-and-in-vitro-degradation-behavior-of-newly-developed-znag-alloys-for-degradable-implant-applications
#19
M Sikora-Jasinska, E Mostaed, A Mostaed, R Beanland, D Mantovani, M Vedani
Zn and Zn-based alloys have been recognized as highly promising biodegradable materials for orthopedic implants and cardiovascular stents, due to their proved biocompatibility and, more importantly, lower corrosion rates compared to Mg alloys. However, pure Zn has poor mechanical properties. In this study, Ag is used as a promising alloying element to improve the mechanical properties of the Zn matrix as well as its biocompatibility and antibacterial properties. Accordingly, we design three ZnAg alloys with Ag content ranging from 2...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28512069/optical-coherence-tomography-findings-insights-from-the-randomised-multicentre-trial-investigating-angiographic-outcomes-of-hybrid-sirolimus-eluting-stents-with-biodegradable-polymer-compared-with-everolimus-eluting-stents-with-durable-polymer-in-chronic-total
#20
Koen Teeuwen, Eva M Spoormans, Johan Bennett, Christophe Dubois, Walter Desmet, Giovanni J Ughi, Ann Belmans, Johannes C Kelder, Jan G P Tijssen, Pierfrancesco Agostoni, Maarten J Suttorp, Tom Adriaenssens
AIMS: The PRISON IV trial investigated the next-generation sirolimus-eluting stent (SES) with ultra-thin struts and biodegradable polymer against the second-generation everolimus-eluting stent (EES) with thin struts and durable polymer in patients with successfully recanalised chronic total occlusions (CTO). In this study, we examined the secondary optical coherence tomography endpoints. METHODS AND RESULTS: The main PRISON IV trial randomised 330 patients to either SES or EES...
May 18, 2017: EuroIntervention
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