NCT01090609已完成4 期
Multicenter, Prospective, Non-randomized Study to Evaluate the Safety of Cronus® Cobalt Chromium Coronary Stent - Study After 9 Months
Scitech Produtos Medicos SA24 个研究点 分布在 1 个国家目标入组 263 人开始时间: 2010年5月1日最近更新:
适应症
干预措施
试验速览
- 阶段
- 4 期
- 状态
- 已完成
- 发起方
- 入组人数
- 263
- 试验地点
- 24
- 主要终点
- Clinical Follow-up
研究概览
简要总结
The objective this study is evaluate the performance and safety of Chronus® cobalt-chromium coronary stent in patients with "de novo" native coronary artery lesions treated with 19-mm-long stents in long-term 9 months.
详细描述
The use of coronary stents has optimized the results of coronary balloon angioplasty for two reasons:
- reduced acute complications, such as acute and subacute occlusion, as well as the need of urgent myocardial revascularization;
- reduced coronary restenosis. STRESS and BENESTENT 1 pivotal clinical trials7,9 laid the foundations for approval and confirmation of the efficacy of coronary stents. These studies showed a reduction in the binary angiographic restenosis rates from 42.1% to 31.6% (p<0.05) and from 32% to 22% (p=0.02), respectively. The efficacy of coronary stents is due to the fact that these devices reduce the acute elastic recoil and late negative remodeling of coronary arteries because of their capacity to maintain the vessel adequately open without reducing vessel diameter.
Cronus® stent is fabricated in cobalt-chromium. This alloy is currently used cardiovascular stents and permanent implants in orthopedic (hips, knees), dental and maxillofacial surgeries. Guidant and Medtronic have conducted clinical evaluations of stents fabricated with a similar cobalt-chromium alloy and demonstrated safety and efficacy of the investigational devices. Both stents are currently available in the European market.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 75 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Age ≥18 years and ≤75 years;
- •Symptomatic cardiac ischemic disease and/or documented evidence of myocardial ischemia;
- •Types B1 and B2 coronary lesions (according to the ACC/AHA classification modified by Ellis);
- •Target lesion located in a native coronary artery;
- •Target lesion in vessel with diameter ranging from 2.5 to 3.5 mm (by visual estimate) amenable to treatment (coverage) with a 19-mm-long stent;
- •Target lesion with >50% diameter stenosis (by visual estimate);
- •Acceptable candidate to myocardial revascularization surgery (coronary artery bypass graft surgery);
- •The subject has been fully informed of the nature of the study, is willing to comply with all study requirements and will provide written informed consent as approved by the Ethics Committee of the respective clinical site.
排除标准
- •Female patients of childbearing potential;
- •Recent Q-wave myocardial infarction occurred within 48 hours prior to the index procedure. Recent Q-wave or non-Q-wave myocardial infarction with still elevated levels of cardiac markers;
- •Documented left ventricular ejection fraction <30%;
- •Renal dysfunction (creatinine > 2.0 mg/dL or 177 µmol/L);
- •Platelet count <100,000 cells/mm³ or >700,000 cells/mm³.;
- •White blood cell count <3,000 cells/mm3;
- •Suspected or documented hepatic disease (including laboratorial evidence of hepatitis);
- •Heart transplant receptor;
- •Known hypersensitivity to cobalt-chromium or to medications such as aspirin, clopidogrel bisulfate (Plavix or ISCOVER), ticlopidine (Ticlid) or heparin.
- •Concurrent medical condition with a life expectancy of less than 12 months;
- •Any major medical condition that, in the Investigator's opinion, may interfere with the optimal participation of the patient in this study;
- •Subject is currently participating in an investigational drug or another device study, including planned participation in an investigational drug or another device study during the course of the present investigation;
- •Coronary angioplasty (with or without stenting) less than 9 months before the index procedure at any site of the target vessel;
- •Previous coronary angioplasty (with or without stenting) at any time (>9 months) in a vessel segment less than 5 mm proximal or distal to the target lesion.
- •Planned coronary angioplasty (with or without stenting) in the first 12 months after the index procedure in any segment of the target vessel;
- •Angiography Exclusion Criteria:
- •Restenotic target lesion;
- •More than one lesion requiring treatment in the same vessel;
- •Target vessel diameter <2.5 mm or >3.5 mm (by visual estimation);
- •Long target lesion not amenable to treatment (coverage) with a 19-mm-long stent;
- •Unprotected coronary artery branch lesion (≥50% diameter stenosis)
- •Target lesion is located in a surgical bypass graft;
- •Total vessel occlusion (TIMI flow grade 0-1);
- •Target lesion with ostial location;
- •Target lesion located in a lateral branch bifurcation >2.5mm or requiring lateral branch stenting;
- •Calcified target lesion that anticipates unsuccessful/impracticable predilation;
- •Target vessel with excessive tortuosity
研究组 & 干预措施
Stent implantation
Experimental
Cronus Stent implantation
干预措施: Stent implantation (Device)
结局指标
主要结局
Clinical Follow-up
时间窗: 30 days after the procedure
All patients are invited to return for a clinical visit at 30 days post-procedure to evaluate possible adverse events and on the continuity of cardiac medication.
次要结局
未报告次要终点
研究者
研究点 (24)
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