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Een onderzoek naar het Choydar Flow-Directed Mesh Stent bij de behandeling van niet-geruptureerde intracraniële aneurysma's (CROWN)

2 november 2026 bijgewerkt door: Johnson & Johnson Medical (Shanghai) Ltd.

Een multicenter, prospectief, observationeel onderzoek met één arm om de veiligheid en effectiviteit van de Choydar Flow-Directed Mesh Stent bij de behandeling van niet-geruptureerde intracraniële aneurysma's te evalueren

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.

Studie Overzicht

Toestand

Werving

Conditie

Studietype

Observationeel

Inschrijving (Geschat)

200

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

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

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar en ouder (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Bemonsteringsmethode

Niet-waarschijnlijkheidssteekproef

Studie Bevolking

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.

Beschrijving

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)

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Observatiemodellen: COHORT
  • Tijdsperspectieven: PROSPECTIVE

Cohorten en interventies

Groep / Cohort
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.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Complete Aneurysm Occlusion Rate at 12 Months Post-Procedure (Raymond-Roy Class I)
Tijdsspanne: 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)
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Johnson & Johnson Medical (Shanghai) Ltd.

Onderzoekers

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

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

28 januari 2026

Primaire voltooiing (Geschat)

10 februari 2028

Studie voltooiing (Geschat)

10 februari 2028

Studieregistratiedata

Eerst ingediend

13 november 2025

Eerst ingediend dat voldeed aan de QC-criteria

13 november 2025

Eerst geplaatst (Werkelijk)

14 november 2025

Updates van studierecords

Laatste update geplaatst (Werkelijk)

3 november 2026

Laatste update ingediend die voldeed aan QC-criteria

2 november 2026

Laatst geverifieerd

1 november 2026

Meer informatie

Termen gerelateerd aan deze studie

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • CNV202507

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

JA

Beschrijving IPD-plan

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.

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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