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Eine Studie zum Choydar Flow-Directed Mesh Stent in der Behandlung von nicht rupturierten intrakraniellen Aneurysmen (CROWN)

2. November 2026 aktualisiert von: Johnson & Johnson Medical (Shanghai) Ltd.

Eine multizentrische, prospektive, einarmige Beobachtungsstudie zur Bewertung der Sicherheit und Wirksamkeit des Choydar Flow-Directed Mesh-Stents bei der Behandlung von nicht rupturierten intrakraniellen Aneurysmen

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.

Studienübersicht

Status

Rekrutierung

Bedingungen

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

200

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

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

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

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.

Beschreibung

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)

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Beobachtungsmodelle: COHORT
  • Zeitperspektiven: PROSPECTIVE

Kohorten und Interventionen

Gruppe / Kohorte
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.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Complete Aneurysm Occlusion Rate at 12 Months Post-Procedure (Raymond-Roy Class I)
Zeitfenster: 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)
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Johnson & Johnson Medical (Shanghai) Ltd.

Ermittler

  • Studienleiter: Johnson & Johnson Medical (Shanghai) Ltd. Clinical Trial, Johnson & Johnson Medical (Shanghai) Ltd.

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

28. Januar 2026

Primärer Abschluss (Geschätzt)

10. Februar 2028

Studienabschluss (Geschätzt)

10. Februar 2028

Studienanmeldedaten

Zuerst eingereicht

13. November 2025

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

13. November 2025

Zuerst gepostet (Tatsächlich)

14. November 2025

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

3. November 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

2. November 2026

Zuletzt verifiziert

1. November 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • CNV202507

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

JA

Beschreibung des IPD-Plans

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.

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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