Search results for " stent"

showing 10 items of 159 documents

Coronarografia diagnostica e conseguenti scelte terapeutiche dopo l’avvento degli stent alla rapamicina: approccio attuale ed evoluzione degli ultimi…

2003

Coronarografia diagnostica stent rapamicina terapia
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Endovascular Aneurysm Repair

2002

Background — The purpose of the present study was to systematically analyze the histopathologic organization processes in excluded aneurysms after endovascular stenting and to develop a noninvasive monitoring method for these processes using MRI. Methods and Results — In 36 mongrel dogs, autologous aortic aneurysms were created. Endovascular treatment was performed using covered stents. Follow-up was after 1 week, 6 weeks, and 6 months. MRI was performed with T 2 -weighted turbo-spin-echo sequences and T 1 -weighted spin-echo sequences and was repeated after contrast bolus with gadolinium. Histopathologic findings were correlated to signal intensities (SIs) of MRI images. SIs of distinct a…

Dense connective tissuemedicine.medical_specialtymedicine.medical_treatmentConnective tissueEndovascular aneurysm repairDogsAneurysmPhysiology (medical)medicine.arterymedicineAnimalsCovered stentAortamedicine.diagnostic_testEcho-Planar ImagingVascular diseasebusiness.industryMagnetic resonance imagingmedicine.diseaseAortic AneurysmSurgerymedicine.anatomical_structureStentsRadiologyCardiology and Cardiovascular MedicinebusinessMagnetic Resonance AngiographyCirculation
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Long-term outcomes comparison of different types of des in elderly patients from a real-world experience

2009

OBJECTIVE: We sought to evaluate the impact on long-term clinical outcomes of different types of drug-eluting stents (DES) in elderly patients. BACKGROUND: Elderly patients constitute a fast-growing portion of cardiovascular patients, however, they are not adequately represented in clinical trials. Moreover, few data comparing different type of DES in elderly patients are available. METHODS: From a total of 2,330 consecutive patients treated at our institution with DES, we selected 207 elderly patients (≥ 75 years of age) who underwent, from May 2002 to December 2006, sirolimus-eluting stent (SES group, 116 patients [pts], 56%) or paclitaxel-eluting stent (PES group, 91 pts, 43.9%) implanta…

ElderlyDrug-eluting stentPaclitaxel-eluting stentSirolimus-eluting stent.
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Efficacy of lumen-apposing metal stents or self-expandable metal stents for endoscopic ultrasound-guided choledochoduodenostomy: a systematic review …

2020

Abstract Background Endoscopic ultrasound (EUS)-guided biliary drainage is becoming an option for palliation of malignant biliary obstruction. Lumen-apposing metal stents (LAMS) are replacing self-expandable metal stents (SEMS). The aim of this meta-analysis was to evaluate the efficacy and safety of LAMS and SEMS for EUS-guided choledochoduodenostomy (EUS-CDS). Methods A meta-analysis was performed using PRISMA protocols. Electronic databases were searched for studies on EUS-CDS. The primary outcome was clinical success. Secondary outcomes were technical success, reintervention, and adverse events. We used the random effects model with the DerSimonian–Laird estimation, and the results were…

Endoscopic ultrasoundmedicine.medical_specialtySelf Expandable Metallic StentsLumen (anatomy)EndosonographySelf Expandable Metallic Stents.StentForest plotmedicineHumansAdverse effectUltrasonography Interventionalmedicine.diagnostic_testbusiness.industryGastroenterologyConfidence intervalSurgerySelf Expandable Metal StentsClinical trialTreatment OutcomeCholedochostomyMeta-analysisDrainageStentsbusinessHumanEndoscopy
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Multi-objective optimization of nitinol stent design.

2017

Nitinol stents continuously experience loadings due to pulsatile pressure, thus a given stent design should possess an adequate fatigue strength and, at the same time, it should guarantee a sufficient vessel scaffolding. The present study proposes an optimization framework aiming at increasing the fatigue life reducing the maximum strut strain along the structure through a local modification of the strut profile.The adopted computational framework relies on nonlinear structural finite element analysis combined with a Multi Objective Genetic Algorithm, based on Kriging response surfaces. In particular, such an approach is used to investigate the design optimization of planar stent cell.The r…

EngineeringCompressive Strengthmedicine.medical_treatment02 engineering and technology030204 cardiovascular system & hematologycomputer.software_genreMulti-objective optimization0302 clinical medicineStentComputer Aided DesignFatigueSafety factorStructural engineeringEquipment DesignFatigue limitFinite element methodsurgical procedures operativeComputer-Aided DesignStentsAlgorithms0206 medical engineeringFinite Element AnalysisBiophysicsBiomedical EngineeringFatigue; Multi-objective optimization; Nitinol; Stent; Structural finite element analysis; Tapered strut; Biophysics; Biomedical Engineering03 medical and health sciencesBlood vessel prosthesisElastic ModulusTensile StrengthGenetic algorithmmedicineAlloysPressureComputer Simulationcardiovascular diseasesbusiness.industryStentStructural finite element analysiNitinolModels Theoreticalequipment and supplies020601 biomedical engineeringTapered strutBlood Vessel ProsthesisMulti-objective optimizationEquipment Failure AnalysisBiophysicStress MechanicalbusinesscomputerMedical engineeringphysics
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Clinical strategies for the management of intestinal obstruction and pseudo-obstruction. A Delphi Consensus study of SICUT (Società Italiana di Chiru…

2016

Intestinal obstructions/pseudo-obstruction of the small/large bowel are frequent conditions but their management could be challenging. Moreover, a general agreement in this field is currently lacking, thus SICUT Society designed a consensus study aimed to define their optimal workout.The Delphi methodology was used to reach consensus among 47 Italian surgical experts in two study rounds. Consensus was defined as an agreement of 75.0% or greater. Four main topic areas included nosology, diagnosis, management and treatment.A bowel obstruction was defined as an obstacle to the progression of intestinal contents and fluids generally beginning with a sudden onset. The panel identified four major…

HerniaDelphi TechniqueContrast MediaAcidosis; Conservative Treatment; Contrast Media; Delphi Technique; Diatrizoate Meglumine; Disease Management; Emergencies; Emergency Medicine; General Surgery; Hernia; Humans; Intestinal Obstruction; Intestinal Pseudo-Obstruction; Intubation Gastrointestinal; Laparotomy; Societies Medical; Stents; Symptom Assessment; Tomography X-Ray ComputedConservative TreatmentStentHumansLarge bowel obstructionIntubation GastrointestinalSocieties MedicalDiatrizoate MeglumineEmergencieLaparotomyIntestinal Pseudo-ObstructionDisease ManagementSmall bowelDelphi study Intestinal obstruction Large bowel obstruction Pseudo-obstruction Small bowelDelphi studyAcidosiGeneral SurgeryEmergency MedicineStentsEmergenciesSymptom AssessmentAcidosisTomography X-Ray ComputedPseudo-obstructionIntestinal ObstructionHuman
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SELF-EXPANDABLE METAL STENT PLACEMENT FOR CLOSURE OF A LEAK AFTER TOTAL GASTRECTOMY FOR GASTRIC CANCER: REPORT ON THREE CASES AND REVIEW OF THE LITER…

2014

In the setting of the curative oncological surgery, the gastric surgery is exposed to complicated upper gastrointestinal leaks, and consequently the management of this problem has become more critically focused than was previously possible. We report here three cases of placement of a partially silicone-coated SEMS (Evolution Controlled Release Esophageal Stent System, Cook Medical, Winston-Salem, NC, USA) in patients who underwent total gastrectomy with Roux-en-Y end-to-side esophagojejunostomy for a gastric adenocarcinoma. The promising results of our report, despite the small number of patients, suggest that early stenting (through a partially silicone-coated SEMS) is a feasible alternat…

Historymedicine.medical_specialtyLeakSettore MED/12 - GastroenterologiaPolymers and PlasticsSelf expandablebusiness.industrymedicine.medical_treatmentCancerCase ReportAnastomosismedicine.diseaseIndustrial and Manufacturing EngineeringSurgeryStent placementSettore MED/18 - Chirurgia GeneraleEsophageal stentmedicinelcsh:Diseases of the digestive system. GastroenterologyGastrectomylcsh:RC799-869Business and International ManagementProspective cohort studybusinessGastric cencer self-expandle metal stent palliation endoscopy
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Koronāro artēriju bifurkāciju perkutānās ārtēšanas stratēģija un rezultāti

2018

Ievads. Koronāro bifurkāciju perkutānā ārstēšana vēl joprojām ir izaicinājums invazīvajiem kardiologiem un ir saistīta ar augstākiem nelabvēlīgu intrahospitālu un ilgtermiņa iznākumu rādītājiem salīdzinājumā ar ne-bifurkāciju bojājumiem. Tehniskās grūtības, kas saistītas ar bifurkāciju bojājumu perkutāno ārstēšanau, ir vienmēr bijis intensīvs pētījumu objekts. Darba mērķis. Novērtēt koronāro bifurkāciju perkutānās ārstēšanas intrahospitālos un ilgtermiņa iznākumus Latvijas Kardioloģijas centra Koronāro bifurkāciju ārstēšanas reģistra pacientiem un noskaidrot šo iznākumu saistību ar bifurkāciju bojājuma ārstēšanas tehniskajiem aspektiem. Materiāli un metodes. No 2017.gada janvāra līdz 2018.g…

Iespējamā sānu zara stentēšanas stratēģijailgtermiņa klīniskie iznākumidivu stentu tehnikaintrahospitālie iznākumiMedicīna
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Early and midterm outcomes of bioresorbable vascular scaffolds for ostial coronary lesions: insights from the GHOST-EU registry.

2016

Aims: We aimed to investigate the outcomes of bioresorbable vascular scaffolds (BVS) in coronary ostial lesions. Ostial lesions represent a challenging angiographic subset, with higher event rates compared with non-ostial lesions. BVS might be associated with advantages over the long term, but their safety in this setting remains to be explored. Methods and results: Procedural and 12-month follow-up data from consecutive patients treated with BVS for lesions located at the ostium of the right (RCA), left anterior (LAD) or circumflex (LCX) coronary in 11 European centres were collected. The primary device-oriented endpoint was defined as a combination of cardiovascular death, target vessel m…

LCX (29Target lesionMale52%). Patients presenting with ostial lesions did not differ from the remaining cohort except for a higher incidence of prior revascularisation. Predilation was performed in 97% of the lesions (vs. 96% in non-ostialp= 0.035)medicine.medical_treatmentMyocardial Infarction304 patients with a mean age of 62 +/- 11years. There were 90 ostial lesions (5.8%) in 84 patients (6.4%) located at the ostial RCA (14Coronary Artery Disease030204 cardiovascular system & hematologyCoronary artery diseasebut their safety in this setting remains to be explored. Methods and results: Procedural and 12-month follow-up data from consecutive patients treated with BVS for lesions located at the ostium of the right (RCA)0302 clinical medicineAbsorbable Implants030212 general & internal medicineMyocardial infarctionCircumflexRegistriesTissue Scaffolds32%)Drug-Eluting StentsMiddle AgedThrombosisCoronary VesselsAims: We aimed to investigate the outcomes of bioresorbable vascular scaffolds (BVS) in coronary ostial lesions. Ostial lesions represent a challenging angiographic subset with higher event rates compared with non-ostial lesions. BVS might be associated with advantages over the long term but their safety in this setting remains to be explored. Methods and results: Procedural and 12-month follow-up data from consecutive patients treated with BVS for lesions located at the ostium of the right (RCA) left anterior (LAD) or circumflex (LCX) coronary in 11 European centres were collected. The primary device-oriented endpoint was defined as a combination of cardiovascular death target vessel myocardial infarction or target lesion revascularisation. The database included a total of 1549 lesions in 1304 patients with a mean age of 62 +/- 11years. There were 90 ostial lesions (5.8%) in 84 patients (6.4%) located at the ostial RCA (14; 16%) LCX (29; 32%) or LAD (47; 52%). Patients presenting with ostial lesions did not differ from the remaining cohort except for a higher incidence of prior revascularisation. Predilation was performed in 97% of the lesions (vs. 96% in non-ostial p= 0.618) post-dilation in 43% (versus 58% in the non-ostial group p= 0.008). At quantitative coronary angiography treatment of ostial lesions was associated with higher residual stenosis (30% [23-41] vs. 26% [20-37] p= 0.035) but no difference in minimum lumen diameter existed (p= 0.447). Follow-up data were available at 385 [362-465] days. The 12-month Kaplan-Meier estimated rates of scaffold thrombosis were 4.9% and 2.0% (ostial and non-ostial lesion groups respectively log-rank p= 0.005). The device-oriented composite endpoint occurred respectively in 12.6% and 4.6% at 12 months (log-rank p= 0.001). Treatment of ostial lesions was an independent predictor of this endpoint (p= 0.0025 HR 2.65 [1.41-4.97]).OstiumAims: We aimed to investigate the outcomes of bioresorbable vascular scaffolds (BVS) in coronary ostial lesions. Ostial lesions represent a challenging angiographic subsetTreatment Outcomein 12.6% and 4.6% at 12 months (log-rank p= 0.001). Treatment of ostial lesions was an independent predictor of this endpoint (p= 0.0025CardiologyFemale549 lesions in 1medicine.symptomCardiology and Cardiovascular MedicineAdultpost-dilation in 43% (versus 58% in the non-ostial groupmedicine.medical_specialtyor LAD (47HR 2.65 [1.41-4.97])but no difference in minimum lumen diameter existed (p= 0.447). Follow-up data were available at 385 [362-465] days. The 12-month Kaplan-Meier estimated rates of scaffold thrombosis were 4.9% and 2.0% (ostial and non-ostial lesion groupsrespectivelyLesion03 medical and health sciencesPercutaneous Coronary Interventionwith higher event rates compared with non-ostial lesions. BVS might be associated with advantages over the long termleft anterior (LAD) or circumflex (LCX) coronary in 11 European centres were collected. The primary device-oriented endpoint was defined as a combination of cardiovascular deathInternal medicinemedicineHumanstarget vessel myocardial infarction or target lesion revascularisation. The database included a total of 1Agedp= 0.008). At quantitative coronary angiographybusiness.industryPercutaneous coronary interventionp= 0.618)treatment of ostial lesions was associated with higher residual stenosis (30% [23-41] vs. 26% [20-37]log-rank p= 0.005). The device-oriented composite endpoint occurredmedicine.diseaseSurgery16%)businessEuroIntervention : journal of EuroPCR in collaboration with the Working Group on Interventional Cardiology of the European Society of Cardiology
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Two-year clinical follow up of coronary drug-eluting stent in patients at high risk for coronary restenosis

2008

OBJECTIVE: To evaluate the long-term follow up of patients at high risk for coronary restenosis. BACKGROUND: Drug-eluting stents (DES) have been proven to reduce restenosis and reintervention compared with bare-metal stents (BMS). Although the safety of DES is not different from that of BMS in the short-to-medium term, concern has arisen about the potential for late stent thrombosis related to delayed endothelialization of the stent struts. METHODS: Among 495 patients who underwent percutaneous coronary intervention between June 2004 and March 2005, we retrospectively identified a subset of 150 patients (30%) at high risk for coronary restenosis on the basis of angiographic characteristics …

Long-term follow up.Drug-eluting stent
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