Coronary Artery Plaque Characterization by NIR Spectroscopy in Patients Undergoing Elective Percutaneous Coronary Intervention
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 发起方
- 入组人数
- 106
- 试验地点
- 11
- 主要终点
- Spectral Similarity
研究概览
简要总结
The purpose of this study is to evaluate a near-infrared (NIR) spectroscopy system that has been designed to identify the chemical composition of coronary artery plaques in patients undergoing a percutaneous coronary intervention (PCI).
详细描述
Extensive studies conducted over the past 7 years in autopsy specimens have demonstrated that NIR spectroscopy can identify the plaque structures that are suspected to cause the acute coronary artery syndromes(unstable angina, myocardial infarction, and sudden death).
The application of NIR spectroscopy to identify lipid deposition within coronary arteries has shown promising results in preclinical ex vivo studies (14). Infrared spectra are collected as follows: light of discrete wavelengths from a laser is directed onto the tissue sample via glass fibers. Light scattered from the samples is collected in fibers and launched into a spectrometer. The plot of signal intensity as a function of wavelength can be then used to develop chemometric models to discriminate lipid-rich deposits from non-atherosclerotic tissue, and from atherosclerotic tissue that is predominantly fibrotic and from blood elements. This technique is incorporated into a thin catheter with similar dimensions to an IVUS catheter, and the intracoronary dwell time for analysis is similar to the broad experience with established techniques with proven safety, such as IVUS.
研究设计
- 研究类型
- Interventional
- 分配方式
- Non Randomized
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •>=18yrs and undergoing elective or non-emergent PCI of a de novo native coronary artery lesion
- •Treatment plan (at time of consent and at time of intervention) must be to perform an intervention on no more than 2 lesions, where one is the culprit lesion and the other lesion requires revascularization at the discretion of the treating physician.
- •Target lesion should have "low-risk" characteristics(defined by angiography)
- •Subject must be able to read, understand and sign an approved informed consent form and follow protocol
- •Female subjects of child bearing potential must have a negative serum pregnancy test prior to enrollment
排除标准
- •Evidence of Clinical instability in the 6 hours before the procedure, or at any time during the procedure (72 hours stable post-STEMI)
- •Angiographically Unsuitable Coronary and/or Lesion Morphology in the culprit vessel.
- •A contraindication to anticoagulation or increased risk of bleeding.
- •Clinically significant abnormal laboratory findings
- •Presence of a drug eluting stent in the artery for experimental study prior to NIR measurement, unless all struts are covered by endothelium as documented by IVUS
- •Elective PCI on or through bypass grafts or LIMA grafts
- •Allergy or intolerance to aspirin or clopidogrel
- •Planned use of laser ablation, rotational ablation, brachytherapy, or atherectomy device
- •Enrollment or participation in any other medication trial within the previous 30 days
- •Current enrollment participation or enrolled in another clinical trial
- •Any other factor that the investigator feels would put the patient at increased risk if participating in the protocol
结局指标
主要结局
Spectral Similarity
时间窗: Baseline
Average spectral similarity of the spectra in a complete scan per patient as compared to the autopsy spectral data set.Clinical data was considered similar to autopsy data if average spectral similarity in each scan was \>=67%, on a continuous range of 0%(different) to 100%(identical) similarity.
次要结局
- Review of Lipid Core Plaque of Interest Near Infrared Signals Observed at Baseline in Patients With Stable Angina vs Acute Coronary Syndromes(Baseline)
- Identification of Distinct Near Infrared Spectral Characteristics Associated With Special Coronary Artery Features Identified by Angiography and/or Intravascular Ultrasound and Patient Characteristics(Baseline)
- Clinical Cardiac Events Definitely Attributable to the Study Device That Occur From Enrollment to 7 Days Post Enrollment(Baseline to 7 day)
- Cardiac Events That Occur Within 1 Year Post Enrollment Will be Examined for Link to Lipid Signals.(1 year)