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This is a prospective, multicenter, cohort study aiming to compare the safety and efficacy of Embotrap stent retriever to other stent retrievers without inner channel for acute middle cerebral artery occlusion (MCAO). All enrolled patients will be followed up at 90 days after randomization.
AIS due to large vessel occlusion (LVO) remains a substantial cause of mortality and morbidity. Recent guidelines have recommended MT as the first-line therapy for AIS-LVO in the anterior circulation. Thrombectomy using a stent retriever is safe and effective in the treatment of AIS. As a new generation of stent retriever, Embotrap stent retriever has a unique design including an open outer cage for clot capture and a closed inner channel for clot stabilization. Previous studies showed Embotrap stent retriever can achieve a successful recanalization of 88% and favorable outcome of 51%. Also, the Multicenter ARISE II Study showed the first-pass effect of EmboTrap stent retriever was 40.1%, higher than other stent retrievers, such as Solitaire FR and Trevo device. But most studies were single-armed without direct comparison. Thus, this prospective cohort study is designed to compare the safety and efficacy of Embotrap stent retriever with other stent retrievers without inner channel.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Embotrap stent retriever | Experimental |
| |
| Other stent retriever without endochannel | Active Comparator |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Embotrap stent retriever | Device | Embotrap has a novel design of an open outer cage for clot capture and a closed inner channel for clot stabilization, with great thrombus fixation and anti-escape ability, to improve the successful recanalization rate and good prognosis of patients. |
| Measure | Description | Time Frame |
|---|---|---|
| First-pass complete recanalization rate | FPE, eTICI≥2c | intraoperative (After first-pass thrombectomy) |
| Measure | Description | Time Frame |
|---|---|---|
| First-pass successful recanalization rate | mFPE, eTICI≥2b50 | intraoperative (After first-pass thrombectomy) |
| Final successful recanalization rate | mFPE, eTICI≥2b50 |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Liqun Jiao, Dr. | Contact | 13911224991 | liqunjiao@sina.cn | |
| Bin Yang, Dr. | Contact | 18519271163 | yangbin_81@163.com |
| Name | Affiliation | Role |
|---|---|---|
| Liqun Jiao, Dr. | Xuanwu Hospital, Beijing | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Xuanwu Hospital, Capital Medical University. | Recruiting | Beijing | 100053 | China |
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| ID | Term |
|---|---|
| D020521 | Stroke |
| D000083242 | Ischemic Stroke |
| ID | Term |
|---|---|
| D002561 | Cerebrovascular Disorders |
| D001927 | Brain Diseases |
| D002493 | Central Nervous System Diseases |
| D009422 | Nervous System Diseases |
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This study is a multicenter, parallel cohort study. The patients with acute middle cerebral artery occlusion were divided into Embotrap group and control group at a ratio of 1:1 to receive mechanical thrombectomy. The patients in control group will receive thrombectomy using stent retriever without inner channel approved by FDA or NMPA. Several aspects such as first-pass recanalization rate, the successful recanalization rate, and mRS score at 90 days will be compared between the two groups.
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| Solitaire FR, Trevo stent retriever without inner channel | Device | Other stent retriever without inner channel, such as Solitaire FR, Trevo, and other stent retrievers approved by FDA or NMPA. |
|
| intraoperative (Final Digital Subtraction Angiography (DSA) during operation) |
| Final complete recanalization rate | FPE, eTICI≥2c | intraoperative (Final Digital Subtraction Angiography (DSA) during operation) |
| 90-day favorable outcome rate | Modified Rankin scale (mRS), the scale runs from 0 to 6, running from perfect health without symptoms to death. 90-day favorable outcome is identified as mRS 0-2. | 90-days (±14days) |
| The improvement of the NIHSS scores 24 hours after surgery | National Institutes of Health Stroke Scale (NIHSS) | 24 hours after surgery |
| The improvement of the NIHSS scores 5-7 days after surgery or at discharge | National Institutes of Health Stroke Scale (NIHSS) | 5-7 days after surgery or at discharge, whichever came first |
| The rescue therapy rate | The rate of rescue therapy, such as balloon dilation, stent implantation, and intra-arterial thrombolysis. | During procedure time |
| FFR after 5 minutes of mechanical thrombectomy | Fractional flow reserve (FFR) | 5 minutes after successful vessel recanalization. |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |