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Studie týkající se použití stentu Choydar Flow-Directed Mesh při léčbě neprasklých intrakraniálních aneurysmat (CROWN)

2. listopadu 2026 aktualizováno: Johnson & Johnson Medical (Shanghai) Ltd.

Multicentrická, prospektivní, jednoramenná observační studie vyhodnocující bezpečnost a účinnost průtokově řízeného síťkového stentu Choydar v léčbě neprasklých intrakraniálních aneurysmat

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.

Přehled studie

Postavení

Nábor

Podmínky

Typ studie

Pozorovací

Zápis (Odhadovaný)

200

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní kontakt

Studijní místa

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

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

18 let a starší (Dospělý, Starší dospělý)

Přijímá zdravé dobrovolníky

Ne

Pohlaví způsobilá ke studiu

Všechno

Metoda odběru vzorků

Vzorek nepravděpodobnosti

Studijní populace

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.

Popis

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)

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Observační modely: COHORT
  • Časové perspektivy: PROSPECTIVE

Kohorty a intervence

Skupina / kohorta
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.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
Complete Aneurysm Occlusion Rate at 12 Months Post-Procedure (Raymond-Roy Class I)
Časové okno: 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)
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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
Časové okno: 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

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Vyšetřovatelé

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

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Aktuální)

28. ledna 2026

Primární dokončení (Odhadovaný)

10. února 2028

Dokončení studie (Odhadovaný)

10. února 2028

Termíny zápisu do studia

První předloženo

13. listopadu 2025

První předloženo, které splnilo kritéria kontroly kvality

13. listopadu 2025

První zveřejněno (Aktuální)

14. listopadu 2025

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

3. listopadu 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

2. listopadu 2026

Naposledy ověřeno

1. listopadu 2026

Více informací

Termíny související s touto studií

Další identifikační čísla studie

  • CNV202507

Plán pro data jednotlivých účastníků (IPD)

Plánujete sdílet data jednotlivých účastníků (IPD)?

ANO

Popis plánu IPD

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.

Informace o lécích a zařízeních, studijní dokumenty

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

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