REperfusion With Cooling in CerebraL Acute IscheMia II
试验速览
- 阶段
- 2 期
- 状态
- 撤回
- 试验地点
- 2
- 主要终点
- Hemorrhagic Conversion
研究概览
简要总结
The purpose of this study is to determine whether reducing a patient's body temperature (mild hypothermia of 33 degrees Centigrade) will significantly reduce the risk of brain injury (notably reperfusion injury and hemorrhagic conversion) in patients who have suffered a significant interruption of blood flow to an area of brain (occlusion of large proximal cerebral artery) and have undergone successful removal of that interruption (revascularization).This will be achieved by comparing patients who have undergone hypothermia to those who have not.
详细描述
This study is designed to examine the safety and proof of concept of therapeutic hypothermia prior to conventional revascularization in subjects experiencing acute ischemic stroke by comparing the results to subjects who remain at normal body temperature (normothermic) and proceed directly to reperfusion via conventional reperfusion intervention.
The investigational plan also examines the following outcomes in 85 subjects randomized to either hypothermia or normothermia:
- Regulation of biomarkers indicative of ischemia-reperfusion injury
- Changes in blood brain injury using the Hyperintense Acute Reperfusion Marker (HARM) protocol MRI as a surrogate imaging biomarker
- Incidence of hemorrhagic conversion post reperfusion
- Neurologic function at 90 days post acute ischemic stroke.
The results of this study will be used to power a definitive phase III clinical trial evaluating the combination of hypothermia and revascularization versus reperfusion alone.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 79 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Male or female subjects of any ethnicity and age >/=18 but </= 79 years;
- •Symptom onset </=8 hours;
- •Symptoms consistent with an ischemic stroke with a large vessel occlusion (Middle Cerebral Artery (MCA), Internal Carotid Artery (ICA) terminus) as determined by CT imaging of the brain;
- •Alberta Stroke Program Early CT Score (ASPECTS) of 5-10 on non-contrast CT of the brain;
- •Ability to undergo endovascular reperfusion therapy;
- •No contraindications to general anesthesia, conscious sedation, or allergies to any components associated with the anticipated diagnostic or treatment procedures that cannot be treated;
- •A pre-treatment modified Rankin Scale (mRS) of 0 or 1;
- •Baseline CT scan shows no hemorrhage;
- •National Institutes of Health Stroke Scale (NIHSS) 14-29;
- •Subject has either 1) failed iv tissue plasminogen activator (tPA) therapy or 2) contradicted for iv tPA therapy;
- •Subject is capable of complying with study procedures and agrees to complete all required study procedures, study visits and associated activities.
- •Subject or legally authorized representative must be able to understand and give written informed consent.
排除标准
- •Females of childbearing potential who are pregnant or not using adequate contraception;
- •Bleeding diathesis with a platelet count < 50,000 or International Normalized Ratio (INR) >1.7 or any active or recent (within 10 to 30 days) hemorrhage;
- •History of genetically confirmed hypercoagulable syndrome;
- •Any condition that excludes MRI imaging;
- •History of dementia, currently on Aricept or Namenda, or other Alzheimer's-like symptoms;
- •End stage renal disease on hemodialysis;
- •History of cardiac arrest;
- •Presence of an inferior vena cava (IVC) filter;
- •Contrast dye allergy with history of anaphylaxis, known serious sensitivity to contrast agents or any condition in which angiography is contraindicated;
- •Known allergy to meperidine or buspar;
- •Prior neurologic event that would obscure interpretation of the signal and current presenting neurologic deficits;
- •Sustained hypertension (systolic blood pressure (SBP) > 185 or diastolic blood pressure (DBP) > 110 refractory to treatment);
- •Baseline CT/MRI of head showing evidence of mass effect with mid-line shift, hemorrhage, intracranial tumor, arterial vasculitis or dissection, or bilateral stroke;
- •Presence of any other serious comorbidity that would be likely to impact life expectancy to less than 6 months or limit subject cooperation or study compliance;
- •Concurrent participation in an investigational clinical study that has not completed the follow-up period or planned participation in another study within the next 3 months;
- •Any other condition or personal circumstance that, in the judgment of the investigator, might interfere with the collection of complete, good quality data or the completion of the research study.
结局指标
主要结局
Hemorrhagic Conversion
时间窗: 48 hours
Acute bleeding into the area of the original stroke based on CT or MRI of the head.
次要结局
- Hyperintense Acute Reperfusion Marker (HARM)(48 +/- 24 hours)
- National Institutes of Health Stroke Scale (NIHSS)(Baseline, 24 +/- 6 hours, 48 +/- 24 hours, 8 +/- 2 days, 90 +/- 15 days)
- Modified Rankin Scale (mRS)(Basline, 48 +/- 24 hours, 90 +/- 15 days)
- Number of participants with adverse events(90 days)