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未破裂脳動脈瘤の治療におけるChoydar Flow-Directed Meshステントに関する研究 (CROWN)

2026年11月2日 更新者：Johnson & Johnson Medical (Shanghai) Ltd.

未破裂頭蓋内動脈瘤の治療におけるChoydar Flow-Directed Meshステントの安全性と有効性を評価する多施設共同前向き単群観察研究

The purpose of this study is to assess how safe choydar flow-directed mesh stent is and how well it works in the treatment of unruptured intracranial aneurysms (a condition in which a bulging blood vessel in the brain can burst and cause bleeding) in a real-world setting.

調査の概要

状態

募集

条件

研究の種類

観察的

入学 (推定)

200

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究場所

  • 中国
      • Chenzhou、中国、432000
        • 募集
        • Chenzhou No.1 People's Hospital
      • Guangzhou、中国、519041
        • 募集
        • Guangdong Provincial People's Hospital
      • Nanjing、中国、210008
        • 募集
        • Nanjing Drum Tower Hospital The Affiliated Hospital of Nanjing University Medical School
      • Nanjing、中国、210029
        • 募集
        • The First Affiliated Hospital of Nanjing Medical University
      • Nanyang、中国、473000
        • 募集
        • Nanyang Central Hospital
      • Taiyuan、中国、30012
        • 募集
        • Shanxi Provincial People's Hospital
      • Wuhu、中国、241001
        • 募集
        • The First Affiliated Hospital of Wannan Medical College
      • Zhengzhou、中国、450052
        • 募集
        • The First Affiliated Hospital of Zhengzhou University

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

適格基準

就学可能な年齢

18年歳以上 (大人、高齢者)

健康ボランティアの受け入れ

いいえ

受講資格のある性別

全て

サンプリング方法

非確率サンプル

調査対象母集団

Adult participants with unruptured wide-neck (neck width >= 4 mm or dome-to-neck ratio <2) saccular or fusiform aneurysms in the internal carotid artery (from the petrous segment to the distal end) and the vertebral artery arising from a parent vessel with a diameter >= 2.0 mm and <= 6.0 mm.

説明

Inclusion criteria:

Participants meeting all the following inclusion criteria will be included:

Preoperative inclusion criteria:

  • Presence of unruptured aneurysms in the internal carotid artery (from the petrous segment to the distal end) or vertebral artery identified by digital subtraction angiography (DSA), computed tomography angiography (CTA), or magnetic resonance angiography (MRA) prior to surgery, wide-neck (neck width greater than or equal to [>=] 4 millimeters [mm] or dome-to-neck ratio less than [<] 2) saccular or fusiform aneurysms, and the parent artery diameter must be >= 2.0 mm and less than or equal to [<=] 6.0 mm
  • Participants and/or their authorized representatives understand the purpose of the study, and are willing to voluntarily participate in the study and sign the informed consent form (ICF)
  • Prior to enrollment, a clinical decision has already been made to use the choydar flow-directed mesh stent
  • Participants who are willing and able to return for all follow-up visits as required by the study protocol

Intraoperative inclusion criteria:

- Presence of unruptured aneurysms in the internal carotid artery (from the petrous segment to the distal end) or vertebral artery identified by DSA during the procedure, wide-neck (neck width >= 4 mm or dome-to-neck ratio <2) saccular or fusiform aneurysms, and the parent artery diameter must be >= 2.0 mm and <= 6.0 mm

Exclusion criteria:

Participants meeting any of the following exclusion criteria will be excluded:

  • Participants with anatomy are unsuitable for flow diverter passage or placement or lesions unsuitable for flow diverter delivery and deployment (for example, the lesion vessel is excessively tortuous or tiny, the flow diverter cannot reach the lesion site, stenosis exists in the target vessel of recurrent aneurysm, or the flow diverter is not completely deployed)
  • Participants who are allergic to contrast media
  • Participants who are allergic to nickel-titanium alloy or platinum-tungsten alloy
  • Participants who are contraindicated for antiplatelet and/or anticoagulant therapy
  • Participants with active bacterial infections
  • Participants who are confirmed positive pregnancy (for example, via test or oral communication) according to the site-specific standard of care
  • Participants who are currently participating in an investigational (drug, device, etc.) clinical study that may confound the study endpoints (excluding observational, natural history, and/or epidemiological studies that do not require interventions)

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

研究はどのように設計されていますか？

デザインの詳細

  • 観測モデル：COHORT
  • 時間の展望：PROSPECTIVE

コホートと介入

グループ/コホート
Choydar Flow-Directed Mesh Stent

The choydar flow-directed mesh stent will be used in accordance to its Instructions For Use (IFU) in participants with unruptured intracranial aneurysms. Participants will not receive any other intervention as a part of this study.

この研究は何を測定していますか？

主要な結果の測定

結果測定
メジャーの説明
時間枠
Complete Aneurysm Occlusion Rate at 12 Months Post-Procedure (Raymond-Roy Class I)
時間枠：At 12 months follow-up post-procedure

Complete aneurysm occlusion rate as per Raymond Roy classification criteria (Class I) is defined as complete obliteration (no contrast filling in aneurysm body or neck). It is calculated as follows: number of target aneurysms achieving Raymond-Roy Class I occlusion at 12-month follow-up post-procedure/number of target aneurysms with 12-month imaging evaluation * 100 percent (%).
At 12 months follow-up post-procedure
Adequate Aneurysm Occlusion Rate at 12-month Follow-up Post-Procedure (Raymond-Roy Classes I and II)
時間枠：At 12 months follow-up post-procedure

Adequate aneurysm occlusion rate as per Raymond Roy classification criteria (Class II and III) is defined as Class II: residual neck (contrast filling in aneurysm neck but none in aneurysm body) and Class III: residual aneurysm (contrast filling in aneurysm body). It is calculated as follows: number of target aneurysms achieving Raymond-Roy Class I/II occlusion at 12-month follow-up post-procedure/number of target aneurysms with 12-month imaging evaluation * 100 %.
At 12 months follow-up post-procedure
Percentage of Participants with Immediate Technical Success Rate of Procedure
時間枠：At Day 0 (Day of procedure)

Percentage of participants with immediate technical success rate of procedure will be reported. Immediate technical success of the procedure is defined as the percentage of participants in whom the flow diverter is successfully deployed during the procedure, with accurate positioning confirmed by intra-procedure angiography, and with effective coverage of the aneurysm neck by the implant. It is calculated as follows: number of participants with successful placement of the investigational device/total number of participants undergoing the treatment * 100 %.
At Day 0 (Day of procedure)
Re-treatment Rate of Target Aneurysm at 12-Month Follow-up Post-Procedure
時間枠：At 12 months follow-up post-procedure

The incidence of re-treatment of the target aneurysm at 12 months follow-up post-procedure will be reported.
At 12 months follow-up post-procedure
Percentage of Participants with Modified Rankin Scale (mRS) Score of 0-2 at 12 Months Post-Procedure
時間枠：At 12 months follow-up post-procedure

Percentage of participants with mRS score of 0-2 at 12 months post-procedure will be reported. The mRS score is issued to evaluate the improvement of neurological function. It assesses the ability of participants with neurological disease to live independently. There are 7 levels of this score, 0 points represent no symptoms of disability, higher scores mean worse prognosis of participants , and 6 points represent death.
At 12 months follow-up post-procedure
Number of Participants with Major Ischemic/Hemorrhagic Events and/or Death During Perioperative Period
時間枠：Perioperative

Number of participants with major ischemic/hemorrhagic events and/or death during perioperative period will be reported. Major ischemic/hemorrhagic events are defined as an increase of >= 4 points in the National Institutes of Health Stroke Scale (NIHSS) score compared with the previous score.
Perioperative
Number of Participants with Major Ischemic/Hemorrhagic Events and/or Death During 12-Month Follow-up
時間枠：At 12 months follow-up post-procedure

Number of participants with major ischemic/hemorrhagic events and/or death during 12 months follow-up period will be reported. Major ischemic/hemorrhagic events are defined as an increase of >= 4 points in the NIHSS score compared with the previous score.
At 12 months follow-up post-procedure
Number of Participants with Severe in-Stent Stenosis (Greater Than [>] 50%) During 12-Month Follow-up
時間枠：At 12 months follow-up post-procedure

Number of participants with severe in-stent stenosis during 12-month follow-up period will be reported. The percent stenosis is calculated according to the calculation method of Warfarin-Aspirin Symptomatic Intracranial Disease (WASID) study as follows: (1 - Ds [Diameter of the artery at the site of the most severe stenosis]/Dn [Diameter of the normal artery]) * 100%.
At 12 months follow-up post-procedure
Rupture Rate of Target Aneurysm During 12-Month Follow-Up Post-Procedure
時間枠：At 12 months follow-up post-procedure

The incidence of rupture of the target aneurysm within 12 months post-procedure will be reported.
At 12 months follow-up post-procedure

協力者と研究者

ここでは、この調査に関係する人々や組織を見つけることができます。

スポンサー

Johnson & Johnson Medical (Shanghai) Ltd.

捜査官

  • スタディディレクター：Johnson & Johnson Medical (Shanghai) Ltd. Clinical Trial、Johnson & Johnson Medical (Shanghai) Ltd.

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (実際)

2026年1月28日

一次修了 (推定)

2028年2月10日

研究の完了 (推定)

2028年2月10日

試験登録日

最初に提出

2025年11月13日

QC基準を満たした最初の提出物

2025年11月13日

最初の投稿 (実際)

2025年11月14日

学習記録の更新

投稿された最後の更新 (実際)

2026年11月3日

QC基準を満たした最後の更新が送信されました

2026年11月2日

最終確認日

2026年11月1日

詳しくは

本研究に関する用語

追加の関連 MeSH 用語

その他の研究ID番号

  • CNV202507

個々の参加者データ (IPD) の計画

個々の参加者データ (IPD) を共有する予定はありますか?

はい

IPD プランの説明

The data sharing policy of Johnson & Johnson MedTech is available at www.innovativemedicine.jnj.com/our-innovation/clinical-trials/transparency. As noted on this site, requests for access to the study data can be submitted through Yale Open Data Access (YODA) Project site at yoda.yale.edu.

医薬品およびデバイス情報、研究文書

米国FDA規制機器製品の研究

いいえ

この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。

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