Clinical trial NCT05593224: The Efficacy and Safety of Intracranial Stent (Tonbridge) in Endovascular Treatment of Intracranial Atherosclerotic Stenosis
Official title: The Efficacy and Safety of the Intracranial Stent (Tonbridge) in Endovascular Treatment of Intracranial Atherosclerotic Stenosis: A Prospective, Multicenter, Single-Arm Trial
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Intracranial Atherosclerosis
Lead sponsor: Ton-Bridge Medical Tech. Co., Ltd
Sponsor class: INDUSTRY
First posted: 2022-10-25
Enrollment: 156
Sex: ALL
Minimum age (years): 18
Maximum age (years): 75
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The purpose of this study is to verify the efficacy and safety of the Intracranial Stent (Tonbridge) in endovascular treatment of intracranial atherosclerotic stenosis.

Detailed description: This is a prospective, multicenter, single-arm clinical trial carried out in 14 centers throughout China. 156 subjects with intracranial atherosclerotic stenosis will be treated with the Intracranial Stent (Tonbridge) for the expansion of vascular stenosis site. The primary objective of this study is to evaluate the effectiveness and safety of the intracranial stent for endovascular treatment of intracranial atherosclerotic stenosis.

Eligibility criteria: Inclusion Criteria:

* Age 18-75
* Subjects with symptomatic intracranial atherosclerotic stenosis who do not respond to antiplatelet therapy or have poor compensation of collateral circulation and hypoperfusion in the offending vessel blood supply
* The last onset time of TIA is not limited or the last onset of ischemic stroke is more than 2 weeks
* The lesion is confirmed to be located in intracranial large arteries, including intracranial segment of the internal carotid artery, middle cerebral artery, intracranial segment of vertebral artery and the basilar artery
* Target vessel diameter≥2.0mm and ≤4.5mm, lesion length ≤33mm
* Stenosis degree of intracranial arteries≥70% and ≤99% measured by intracranial angiography (WASID method)
* Intracranial artery stenosis which requiring interventional treatment is a single lesion
* Subjects have at least 1 atherosclerotic plaque risk factor including hypertension, diabetes mellitus, hyperlipidemia, hyperhomocysteinemia, coronary heart disease, obesity, and smoking history
* mRS≤2 before enrollment
* Voluntarily participate in this study and sign the informed consent form, can complete examinations and follow-ups in accordance with the requirements of the protocol during the clinical trial

Exclusion Criteria:

* Intracranial arterial stenosis caused by non-atherosclerotic lesions: such as arterial dissection, moyamoya disease, vasculitis, active arteritis, etc.
* Preoperative MRI shows only perforator infarction in the target lesion
* Preoperative CT or MRI indicates the presence of post-infarct hemorrhagic transformation in the target vascular, or a history of subarachnoid, subdural, and epidural hemorrhage within 30 days before procedure, or the presence of untreated chronic subdural hematoma (≥5mm)
* Severe calcification of target vessels; or target vessel tortuosity or other reasons will make experimental device difficult to reach the target lesion position
* There is more than 70% stenosis in the distal intracranial large vessels or proximal intracranial and extracranial large vessels of the target vessels, and the presence of unidentified responsible lesions
* Subjects have a major surgery within 30 days before procedure or intend to be hospitalized for other procedure within 6 months after procedure
* Intracranial tumors or intracranial arteriovenous malformations, or distal and proximal target vessels combined with aneurysms
* The target lesion has a history of stent implantation
* It is suspected that there is severe allergy or contraindication to aspirin, clopidogrel, heparin, contrast media, nitinol and other drugs and devices related to endovascular therapy
* There is an underlying source of cardiac thrombus, such as atrial fibrillation, left ventricular thrombus, myocardial infarction within 30 days
* Subjects with an INR \> 1.5 or the presence of nonmodifiable bleeding factors
* Medically uncontrolled severe hypertension (systolic blood pressure \> 180 mmHg or diastolic blood pressure \> 110 mmHg)
* Severe comorbid conditions or unstable conditions, such as severe heart failure, pulmonary failure, or renal failure (serum creatinine \>3.0 mg/dL (264μmol/L)), severe liver insufficiency (ALT or AST \>3 times normal), and malignancy
* Life expectancy is less than two years
* Women who are pregnant or breastfeeding
* Subjects unable to complete follow-up due to cognitive impairment, mood disorder, or mental illness
* Subjects who are enrolled in other clinical trials of drugs/devices and have not yet met the primary endpoint
* Other circumstances which investigators do not consider are appropriate for intracranial stent treatment

Primary outcomes:
measure: Incidence of in-stent restenosis at 6 months
timeFrame: 6 months post-procedure
Secondary outcomes:
measure: Device success rate and procedural success rate
timeFrame: Intraoperation
measure: Incidence of symptomatic in-stent restenosis at 6 months, 1 year, and 2 years
timeFrame: 6 months, 1 year, and 2 years post-procedure
measure: Ratio of mRS 0-2 at 30 days, 6 months, 1 year, and 2 years
timeFrame: 30 days, 6 months, 1 year, and 2 years post-procedure
measure: Incidence of stent restenosis at 1 and 2 years
timeFrame: 1 and 2 years post-procedure
measure: Incidence of any stroke and death within 30 days
timeFrame: Within 30 days post-procedure
measure: Mortality at 31 days to 6 months, 6 to 12 months, and 12 to 24 months
timeFrame: 31 days to 6 months, 6 to 12 months, and 12 to 24 months post-procedure
measure: Incidence of ischemic stroke in the target vessel at 31 days to 6 months, 6 to 12 months, and 12 to 24 months
timeFrame: 31 days to 6 months, 6 to 12 months, and 12 to 24 months post-procedure
measure: Incidence of ischemic stroke in non-target vessel at 31 days to 6 months, 6 to 12 months, and 12 to 24 months
timeFrame: 31 days to 6 months, 6 to 12 months, and 12 to 24 months post-procedure
measure: The incidence of any hemorrhagic stroke at 31 days to 6 months, 6 to 12 months, and 12 to 24 months
timeFrame: 31 days to 6 months, 6 to 12 months, and 12 to 24 months post-procedure
measure: Incidence of device deficiency
timeFrame: After use of device to end of study
measure: Incidence of adverse events (AE) at 30 days, 6 months, 1 year, and 2 years
timeFrame: Through 2 years post-procedure
measure: Incidence of serious adverse events (SAE) at 30 days, 6 months, 1 year, and 2 years
timeFrame: Through 2 years post-procedure
Other outcomes:
Locations:
city: Shijiazhuang
country: China
facility: The First Hospital of Hebei Medical University
state: Hebei
city: Luoyang
country: China
facility: The First Affiliated Hospital of Henan Science ＆ Technology University
state: Henan
city: Wuhan
country: China
facility: Zhongnan Hospital of Wuhan University
state: Hubei
city: Nanjing
country: China
facility: Nanjing Drum Tower Hospital
state: Jiangsu
city: Nanchang
country: China
facility: Jiangxi Provincial People's Hospital
state: Jiangxi
city: Changchun
country: China
facility: The First Hospital of Jilin University
state: Jilin
city: Dalian
country: China
facility: The First Affiliated Hospital of Dalian Medical University
state: Liaoning
city: Baotou
country: China
facility: Baotou City Central Hospital
state: Neimenggu
city: Jining
country: China
facility: Affiliated Hospital of Jining Medical University
state: Shandong
city: Kunming
country: China
facility: First Affiliated Hospital of Kunming Medical University
state: Yunnan
city: Hangzhou
country: China
facility: Hangzhou First People's Hospital
state: Zhejiang
city: Ningbo
country: China
facility: Ningbo First Hospital
state: Zhejiang
city: Shanghai
country: China
facility: Changhai Hospital of Shanghai
city: Shanghai
country: China
facility: Tongji Hospitai of Tongji University
Study officials:
affiliation: Changhai Hospital
name: Jianmin Liu
role: PRINCIPAL_INVESTIGATOR
affiliation: The First Hospital of Jilin University
name: Shouchun Wang
role: PRINCIPAL_INVESTIGATOR
References: