Atherosclerosis of Artery Clinical Trial
Official title:
Assessment the Safety and Efficacy of Cold Laser Plaque Ablation for Lower Limb Arterial Stenosis and Occlusive Lesions: A Prospective, Multicenter, Randomized Controlled Study.
This study is a prospective, multi-center, randomized controlled study, which evaluates the effectiveness and safety of cold laser plaque ablation for lower limb arterial stenosis and occlusive lesions from intermittent claudication to chronic threatening limb ischemia.
Status | Recruiting |
Enrollment | 110 |
Est. completion date | December 31, 2024 |
Est. primary completion date | June 30, 2024 |
Accepts healthy volunteers | No |
Gender | All |
Age group | 18 Years to 85 Years |
Eligibility | Inclusion Criteria: General selection criteria 1. Age between 18 and 85, gender is not limited; 2. Patients with symptomatic lower extremity arteriosclerosis disease (LEAD), Rutherford grade 2 to 5; 3. The stenosis of lower extremity arteries is greater than 70% or occlusion; 4. The subject is able and willing to comply with all requirements, including 6-month follow-up and evaluation, voluntary participation and informed consent. Intraoperative contrast inclusion criteria 1. The internal diameter of the reference vessel proximal to the target lesion is greater than 1.8mm; 2. The stenosis of target lesion is greater than 70%; Exclusion Criteria: 1. The target lesion is located in the artificial vascular or autologous venous vascular bypass; 2. Endovascular or surgical procedure in the target limb performed less than or equal to 30 days prior to the index procedure OR Planned endovascular or surgical procedure 30 days after the index procedure; 3. Intent to use other atherectomy device in the same procedure; 4. Flow-limiting dissection within, proximal or distal to the target lesion; 5. Evidence or history of aneurysm in the target vessel, intracranial or gastrointestinal bleeding, intracranial aneurysm, myocardial infarction or stroke within the past 2 months; 6. Uncorrected coagulation abnormalities (platelet count = 75*109/ L or INR=2.0), bleeding constitution, and history of heparin-induced thrombocytopenia (HIT); 7. Any thrombolytic therapy was performed within 2 weeks before surgery; 8. History of severe trauma, fracture, major surgery, or parenchymal organ biopsy within 2 weeks before surgery; 9. Known allergy to contrast agents or perioperative drugs; 10. Anticoagulation, antiplatelet or thrombolytic therapy is prohibited; 11. Pregnant or lactating women; 12. Subjects participating in other clinical trials of drugs or medical devices; 13. Other circumstances assessed by the investigator as inappropriate to participate in the trial. |
Country | Name | City | State |
---|---|---|---|
China | Xuanwu Hospital, Capital Medical University | Beijing | Beijing |
Lead Sponsor | Collaborator |
---|---|
Xuanwu Hospital, Beijing | First Affiliated Hospital Xi'an Jiaotong University, Henan Provincial People's Hospital, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University |
China,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | residual diameter stenosis | Reduction from baseline in residual diameter stenosis (measured in percent), prior to any adjunctive therapy, achieved by the laser catheter, as assessed quantitatively by the core laboratory based upon the procedure angiograms. | 1 month, 6 months after surgery | |
Secondary | Secondary effectiveness evaluating indicator:1)Primary patency rate | Proportion of patients with residual vessel diameter greater than 30% within 1 month and 6 months | 1 month, 6 months after surgery | |
Secondary | Secondary effectiveness evaluating indicator:2)Revascularization rate of target vessels | Proportion of patients requiring reoperation for revascularization within 1 month and 6 months due to recurrence or worsening of symptoms caused by the original diseased vessel | 1 month, 6 months after surgery | |
Secondary | Secondary effectiveness evaluating indicator:3)Rutherford grade | Rutherford classification can effectively evaluate the blood supply of patients' lower limbs | 1 month, 6 months after surgery | |
Secondary | Secondary effectiveness evaluating indicator:4)Ankle-brachial index | Ankle-brachial index is generally the ratio of ankle systolic blood pressure to brachial artery systolic blood pressure. Ankle-brachial index is a test method to objectively determine the severity of limb ischemia | 1 month, 6 months after surgery | |
Secondary | Secondary effectiveness evaluating indicator:5)Instrument performance evaluation | Differences in the ablation effects of cold laser and excimer laser on lesions of different nature (thrombus, calcified plaque) | 1 month | |
Secondary | safety evaluating indicator:1) Major Adverse Event (MAE) | Including limb amputation and death due to inversion of diseased blood vessels | 1 month, 6 months after surgery | |
Secondary | safety evaluating indicator:2)Device-associated composite endpoint (Do CE) | Intraoperative device-induced distal embolization or postoperative vascular occlusion | 1 month | |
Secondary | safety evaluating indicator:3)Adverse events / Serious adverse events (AE / SAE) | Adverse events of perforation, dissection, and postoperative hematoma | 1 month, 6 months after surgery | |
Secondary | safety evaluating indicator:4)Incidence of device defects | For example, lesions in certain specific parts cannot be completely removed, etc. | 1 month |
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