Pilot, Randomized, Controlled, Staggered Start, Feasibility Trial of Ischemic Preconditioning, a Promising Novel Treatment for Stroke Prevention
试验速览
- 阶段
- 不适用
- 状态
- 终止
- 入组人数
- 6
- 试验地点
- 1
- 主要终点
- Duration of Adherence to Ischemic Preconditioning Procedure
研究概览
简要总结
Previous studies in animals and humans has shown that brief periods of reduced blood flow to one organ or tissue in the body can help protect other tissues from subsequent injury caused by reduced blood flow such as a stroke. This phenomenon is known as remote ischemic preconditioning and may help protect brain cells after a stroke. The investigators are studying a specific stroke type called subcortical stroke that is very common and has a high rate of recurrent stroke and cognition problems despite intensive prevention measures.
详细描述
In this study, the investigators will enroll 60 patients. All patients will receive best standard medical therapy for 2 years. In addition, the investigators will randomly assign 40 patients to undergo daily active remote ischemic preconditioning for 1 year, and 20 patients to 1 year of standard medical therapy followed by 1 year of daily active remote ischemic preconditioning. Patient structured interviews will be performed to assess if the treatment is well tolerated and easy for stroke patients to use. Magnetic resonance (MR) pictures of the brain will be used to determine if the active treatment stops the progression of brain injury. Cognitive tests and wireless sensor technology measures will used to learn what happens to the patient's brain and body during the active treatment.
After a subject consents to participate in the study, he/she will first participate in a study screening phase to ensure a basic level of tolerability of Remote Ischemic Conditioning (autoRIC™) device. The subject will undergo one full cycle of treatment under observation of the study team, including 4 cycles of alternating 5 minute inflation and 5 minute off periods
If the subject indicates willingness to continue receiving such treatment (screening success), she/she will enter the randomized trial phase, and be randomly allocated to the treatment or control group.
If subject indicates unwillingness to continue receiving such treatment (screening failure), he/she will not advance to the randomized phase of the trial. Screen failure subjects will be followed up with a 3-day post-device screening phone call to ensure safety and obtain information regarding any adverse events.
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
- Single (Outcomes Assessor)
入排标准
- 年龄范围
- 40 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •I. Clinical
- •Clinical lacunar stroke syndrome within the past 6 months
- •Absence of signs or symptoms of cortical dysfunction
- •No proximal large vessel atherosclerosis, intracranial atherosclerosis or cerebellar stroke.
- •No major cardioembolic source requiring anticoagulation or other specific therapy
- •II. Imaging
- •Magnetic Resonance Imaging (MRI) presence of a small subcortical ischemic, any 1 or more of:
- •Diffusion-weighted imaging (DWI) lesion < 2.0cm in size at largest dimension and corresponding to the clinical syndrome.
- •Well delineated focal hyperintensity <2.0 cm in size at largest dimension (including rostro-caudal extent) on FLAIR or T2 and clearly corresponding to the clinical syndrome. If other focal hyperintensities are present, the case will be discussed with the principal investigator prior to randomization
- •Multiple (at least 2) hypointense lesions of size 0.3-1.5 cm at largest dimension (including rostro-caudal extent) only in the cerebral hemispheres on FLAIR or T1 in patients whose qualifying event is clinically hemispheric
- •Well delinated hypointense lesion <1.5 cm in size at the largest dimension (including rostro-caudal extent) on FLAIR or T1 corresponding to the clinical syndrome. MRI must be done at least 1 months after the qualifying stroke
- •Absence of cortical stroke and large (> 1.5cm) subcortical stroke, recent or remote
- •White matter hyperintensity score of 2 (moderate) or 3 (severe) on the European Scale of Age-Related White Matter Change
- •Absence of cerebral amyloid antipathy (CAA) as per Boston Criteria.
排除标准
- •Disabling stroke (Rankin Scale ≥4)
- •Previous intracranial hemorrhage (excluding traumatic) or hemorrhagic stroke
- •Age under 40 years
- •High risk of bleeding (e.g. recurrent GI or GU bleeding, active peptic ulcer disease, etc.)
- •Anticipated requirement for long term use of anticoagulants (e.g. recurrent deep venous thrombosis (DVT)
- •Prior cortical or retinal stroke (diagnosed either clinically or by neuroimaging), or other prior cortical or retinal transient ischemic attack (TIA)
- •Prior ipsilateral carotid endarterectomy
- •Impaired renal function: estimated GFR <40
- •Intolerance or contraindications to aspirin or clopidogrel (including thrombocytopenia, prolonged INR)
- •Mini Mental Status Exam score < 24 (adjusted for age and education)
- •Medical contraindication to MRI
- •Pregnancy or women of child-bearing age who are not following an effective method of contraception
- •Pre-existing neurologic, psychiatric, or advanced systemic disease that would confound the neurological or functional outcome evaluations
- •SBP <90 or > 200
- •Known history of limb vascular disease, limb vascular bypass surgery, or limb deep venous thrombosis
- •Homeless individuals
- •Patient unable to give informed consent and no available legally authorized representative to provide informed consent
- •Patient unlikely to be compliant with therapy/ unwilling to return for follow up visits
- •Concurrent participation in another study with investigational drug or device treatment
- •Other likely specific cause of stroke (e.g. dissection, vasculitis, prothrombotic diathesis, drug abuse)
研究组 & 干预措施
Medical therapy only
Intensive standard medical secondary prevention stroke treatment as per the recommendations of the American Heart Association/American Stroke Association national guidelines.
Ischemic Preconditioning + Medical
Patients will receive treatment with Cell Aegis remote ischemic preconditioning device once or twice daily for one year. The procedure will consist of up to four 5-minute cycles of bilateral upper extremity ischemia separated by five minutes of reperfusion. Patients will also receive intensive standard medical secondary prevention stroke treatment as per the American Heart Association/American Stroke Association national guidelines.
干预措施: Ischemic Preconditioning (Device)
结局指标
主要结局
Duration of Adherence to Ischemic Preconditioning Procedure
时间窗: 12 months
次要结局
- Limb Ischemia as Assessed by the Preconditioning Device(12 months)
- Patient Self-reported Comfort-discomfort on a Scale of 1-5, With Lowest Score = "Very Comfortable" and 5 = "Very Uncomfortable"(12 months)
研究者
Latisha Sharma, MD
Principal Investigator
University of California, Los Angeles