adaptatiVe Endovascular Strategy to the CloT MRI in Large Intracranial Vessel Occlusion (VECTOR)
In the VECTOR trial, the aim is to analyze, in case of SVS+ occlusions, a first line Embotrap II added to CA combined strategy compare to CA alone strategy.
Many practitioners are convinced that a first line strategy with CA alone is easy, safe, rapid and efficient. Maybe, after two, three, four ... passes and with the secondary help of a combined strategy, a high rate of eTICI 2b/3 could be reached with a CA first line strategy. But this could go with a higher number of passes, a waste of time and a suboptimal angiographic results (eTICI 2b) due to distal emboli, especially in case of friable, non-well organized, red blood cell rich (RBC) i.e. SVS + thrombi (25-28). This could, be related to worst clinical outcome at 3 months. VECTOR asks a relevant question: Do the invetigators have to add the use of an Embotrap II or III to the CA, from the first passes, in case of SVS+ clots?
研究概览
地位
条件
详细说明
Sudden occlusion of an intracranial artery by a thrombus represents the initial and pivotal event of large vessel occlusion acute ischemic stroke (AIS). The primary goal of AIS treatment is to re-open this artery with intravenous tissue-type plasminogen activator infusion (IV t-PA) and/or endovascular therapy (EVT). Thrombus characterization could be useful to predict AIS etiology, IV t-PA response and to adapt the device or technique for EVT. Especially, approaching the red blood cell (RBC) content of the thrombus would be helpful to plan a treatment strategy or identify specific EVT approaches in order to maximize the rate of early successful reperfusion .
The susceptibility vessel sign (SVS) on T2*-MRI sequence is defined as a hypo-intense signal exceeding the diameter of the contralateral artery located at the site of the thrombus. Several studies have demonstrated SVS to be a negative predictor of early reperfusion after IV t-PA and an incentive to EVT . Two studies identified a correlation between the SVS and the thrombus composition (specifically the RBC composition). In the ASTER trial, the presence of SVS impacted the success rate of the EVT strategy. In the SVS (+) sub-population of this study, compared to contact aspiration (CA), patients treated with stent retrievers achieved higher rates of complete reperfusion within fewer passes, which translated into a better functional outcome. In the absence of SVS, no differences were observed between the two techniques. Furthermore; based on the ASTER and THRACE trial populations treated with stent retriever as a first line strategy, a higher rate of favorable clinical outcome at 3 months in SVS (+) patients was recently found . Hence, that differences in terms of reperfusion results are thought to be related to different clot compositions between SVS + and SVS - occlusions.
In the VECTOR trial, the aim is to analyze, in case of SVS+ occlusions, a first line Embotrap II added to CA combined strategy compare to CA alone strategy.
Many practitioners are convinced that a first line strategy with CA alone is easy, safe, rapid and efficient. Maybe, after two, three, four passes and with the secondary help of a combined strategy, a high rate of eTICI 2b/3 could be reached with a CA first line strategy. But this could go with a higher number of passes, a waste of time and a suboptimal angiographic results (eTICI 2b) due to distal emboli, especially in case of friable, non-well organized, red blood cell rich (RBC) i.e. SVS + thrombi. This could, be related to worst clinical outcome at 3 months.
VECTOR asks a relevant question: Do the investigators have to add the use of an Embotrap II or III to the CA, from the first passes, in case of SVS+ clots? The hypothesis in the VECTOR trial is that the Embotrap II or III, thanks to its dedicated design will help to the stabilization of friable clots and allow better retrieving of SVS + thrombi in a lower number of passes.
研究类型
注册 (实际的)
阶段
- 不适用
联系人和位置
学习地点
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-
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Amiens、法国
- CHU Amiens-Picardie
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Angers、法国
- CH Angers
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Bayonne、法国、64109
- CH Côte Basque
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Bordeaux、法国
- Hôpital Pellegrin - CHU Bordeaux
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Brest、法国
- CHRU Brest
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Le Kremlin-Bicêtre、法国
- Hôpital Bicêtre
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Lille、法国
- Hôpital Roger Salengro - CHR Lille
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Limoges、法国
- CHU Limoges
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Lyon、法国
- Hospices Civils Lyon
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Marseille、法国、13385
- CHU Marseille - Hôpital la Timone
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Montpellier、法国
- CHU Gui de Chauliac
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Nancy、法国
- CHU Nancy
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Nantes、法国
- CHU de Nantes
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Paris、法国、75019
- Fondation Ophtalmologique Adolphe de Rothschild
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Paris、法国
- La Pitié Salpétrière
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Paris、法国
- Hôpital Ste Anne
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Pau、法国、64000
- CH Pau
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Reims、法国
- Hôpital Maison Blanche - CHU Reims
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Rennes、法国
- Hôpital Pontchaillou - CHU Rennes
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Strasbourg、法国、67000
- CHU Strasbourg
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Suresnes、法国
- Hôpital Foch
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Tours、法国
- Hôpital Bretonneau - CHU Tours
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Vannes、法国
- CH Bretagne Atlantique
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-
参与标准
资格标准
适合学习的年龄
接受健康志愿者
描述
Inclusion Criteria:
- Age 18 and older (i.e., candidates must have had their 18th birthday)
- Puncture carried out within 24 hours of first symptoms
- Suitable 1.5T MRI T2 * Gradient echo that shows a clear susceptibility vessel sign facing the occlusion
- Neuroimaging demonstrates large vessel proximal occlusion (distal ICA through MCA bifurcation, M1 or proximal M2)
- Patient or trustworthy person informed about the study and having orally consented to participation in the study. If the patient is unable to receive information and no trustworthy person can be contacted during screening for the study, trial inclusion will be completed as an emergency procedure by the investigator, in compliance with the French laws
- With or without intravenous thrombolysis
Exclusion Criteria:
- Absence of large vessel occlusion on non-invasive imaging
- Known or suspected pre-existing (chronic) large vessel occlusion in the symptomatic territory
- Suspected pregnancy; if, in a woman is of child-bearing potential, a urine or serum beta HCG test is positive
- Severe contrast medium allergy or absolute contraindication to use of iodinated products
- Clinical history, past imaging or clinical judgment suggests that the intracranial occlusion is chronic
- Patient has severe or fatal comorbidities that will likely prevent improvement or follow-up or that will render the procedure unlikely to benefit the patient
- Acute ischemic stroke involving posterior circulation (vertebro-basilar occlusion)
- Angiographic evidence of carotid dissection or tandem cervical occlusion or stenosis requiring treatment
- Pregnant or breast-feeding women
- Patient benefiting from a legal protection
- Non-membership of a national insurance scheme
- Opposition of the patient or (in case of inclusion as a matter of urgency) of the trustworthy person
- Patient with modified Rankin score > 3 before qualifying stroke
学习计划
研究是如何设计的？
设计细节
- 主要用途：治疗
- 分配：随机化
- 介入模型：并行分配
- 屏蔽：单身的
武器和干预
参与者组/臂 |
干预/治疗 |
|---|---|
|
实验性的：combined EMBOTRAP II or III and Contact Aspiration
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refer to title
|
|
有源比较器：Contact Aspiration alone
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refer to title
|
研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
|
The rate of near to complete reperfusion after 3 passes of the device defined by a modified treatment in cerebral infarction (eTICI) score of 2c/3
大体时间：At Day 0 immediately after 3 passes
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Preliminary data suggested in case of SVS+ occlusions a superiority of the first line SR strategy in terms of eTICI2c/3 after 3 passes compared to first line CA alone.The first pass (FPE) is an ambitious technical endpoint defined as a successful reperfusion obtained after the first pass that has been recently associated with an increased probability of favorable clinical outcome, a reduced mortality rate and procedural adverse events.However, this constitutes a "very technical" endpoint and the external validity in daily practice would be reduced compared to the three passes cut-off.Even if a FPE eTICI 2b, 2c or 3 has shown better clinical outcome compared to a final eTICI 2b, 2c or 3,there is no study that has proved the better clinical outcome when compared FPE eTICI 2b,2c or 3 to three passes eTICI 2b,2c or 3.Last, there was no preliminary data that suggests in case of SVS+ occlusions, a superiority of the first pass SR strategy in terms eTICI2c/3 compared to first pass CA alone.
|
At Day 0 immediately after 3 passes
|
次要结果测量
结果测量 |
措施说明 |
大体时间 |
|---|---|---|
|
Near to complete first-pass effect
大体时间：Day 0 immediately after first pass
|
Defined as a eTICI 2c/3 after first pass device
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Day 0 immediately after first pass
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Complete first-pass effect
大体时间：Day 0 immediately after first pass
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Defined as a eTICI 3 after first pass device
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Day 0 immediately after first pass
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Complete reperfusion
大体时间：Day 0 immediately after three passes
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Defined as eTICI 3 after three passes
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Day 0 immediately after three passes
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Final near to complete reperfusion
大体时间：Day 0 at the end of the intervention
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Defined as eTICI 2c/3 final
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Day 0 at the end of the intervention
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Final complete reperfusion
大体时间：Day 0 at the end of the intervention
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Defined as eTICI 3
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Day 0 at the end of the intervention
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Time to achieve eTICI 2c or better revascularization
大体时间：Day 0
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Time to achieve eTICI 2c or better revascularization
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Day 0
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Time between groin puncture to clot contact
大体时间：Day 0
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Time between groin puncture to clot contact
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Day 0
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Rate of functional independence
大体时间：At 90days
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Defined as a modified Rankin scale (mRS) 0-2
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At 90days
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Rate of excellent functional outcome
大体时间：At 90days
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Defined as a mRS 0-1
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At 90days
|
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The distribution of mRs scores
大体时间：At 90days
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Combining scores of 9 and 10
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At 90days
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Change in NIHSS from baseline to 24 hours
大体时间：Baseline and 24hours
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Change in NIHSS
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Baseline and 24hours
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Rate of symptomatic and asymptomatic intracerebral hemorrhage
大体时间：At 24hrs
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Assessment of symptomatic and asymptomatic intracerebral hemorrhage at MRI or CT scan 24h after thrombectomy
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At 24hrs
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Rate of parenchymal hematoma type 1 and 2
大体时间：At 24hrs
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Assessment of parenchymal hematoma type 1 and 2
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At 24hrs
|
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Rate of all-cause mortality at 90 days
大体时间：At 90days
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Assessment of all-cause mortality at 90 days
|
At 90days
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Rate of periprocedural complications
大体时间：At 90days
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Occurrence of emboli to new territory, vasospasm, dissection, perforation and subarachnoid hemorrhage
|
At 90days
|
合作者和调查者
调查人员
- 首席研究员：Romain Bourcier、Nantes university hospital
出版物和有用的链接
研究记录日期
研究主要日期
学习开始 (实际的)
初级完成 (实际的)
研究完成 (实际的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (实际的)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
与本研究相关的术语
其他研究编号
- RC19_0174
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研究美国 FDA 监管的设备产品
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