Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
Get a concise snapshot of the trial, including recruitment status, study phase, enrollment targets, and key timeline milestones.
UNKNOWN
500 participants
OBSERVATIONAL
2016-12-31
2018-12-31
Brief Summary
Review the sponsor-provided synopsis that highlights what the study is about and why it is being conducted.
The prevalence varies widely among different detection methods, race/ethnicity or patients with other inherited diseases. Although a wealth of data is available for the natural history of UIAs, the true natural history remains unknown because case selection bias occur in almost all studies. However, data on Chinese UIA is unknown. Using the MR angiography (MRA) to detect aneurysms, the prevalence is 7% of selected adult population in China. Therefore, small UIAs are very common and are increasingly being detected in clinical practice. Conservative treatment, surgical clipping and endovascular coiling are the three treatment options for UIAs. The optimal treatment remains controversial, particularly for small aneurysms (less than 7mm). To date, no clinical trials have compared the safety and efficacy between conservative treatment and surgical clipping or endovascular coiling for UIAs. It may be impossible to conduct the randomized controlled study considering aneurysm ruptured as a devastating event. However, surgical clipping or endovascular treatment itself carries a risk of immediate morbidity or mortality. Therefore, a substantial variability widely exists in treatment decision-making for UIAs, and this may lead to a great variability in clinical recommendations.
Our study is a prospective observational study to identify the incidence of rupture of small aneurysms in the first year after the diagnosis of the aneurysm which is left untreated. Meanwhile, we determine the differences of outcomes, procedural complications, and rates of retreatment between surgical clipping and endovascular coiling for small UIAs in China.
Detailed Description
Dive into the extended narrative that explains the scientific background, objectives, and procedures in greater depth.
2. Study design: A multicenter prospective observation registry study. This study is undertaken to conform to the study protocol. Patients will be recruited between December 2016 and December 2018. Patients are eligible for the study if they meet the inclusion criteria and they are not eligible if any of the following exclusion criteria are met.
3. Procedures: All patients were interviewed by a multidisciplinary team that consisted of vascular neurosurgeons, interventional neuroradiologists and anesthetists. If patients meet all of the inclusion criteria: an unruptured aneurysms ≤5mm are enrolled and then followed up at 6 and12 months. Clinical observation, surgical clipping and endovascular coiling are the three treatment options for UIAs. In general, when an UIA is detected, it should be needed to quit smoking, to aggressively manage hypertension, and to control alcohol use. When an aggressive treatment is considered, treatment risks should be balanced against the risk of rupture.
Conditions
See the medical conditions and disease areas that this research is targeting or investigating.
Keywords
Explore important study keywords that can help with search, categorization, and topic discovery.
Study Design
Understand how the trial is structured, including allocation methods, masking strategies, primary purpose, and other design elements.
COHORT
PROSPECTIVE
Study Groups
Review each arm or cohort in the study, along with the interventions and objectives associated with them.
Observation
Aneurysms are left untreated based on patients and family's wishes. These patients will be included in the observation group.
No interventions assigned to this group
Coiling or Clipping
Patients are included in the coiling group if they undergo endovascular coiling, such as single coiling, stent-assisted coiling and balloon-assisted coiling. Or Patients are included in the clipping group if they undergo surgical coiling, such as aneurysm neck clipping, aneurysm isolation or trapping.
Coiling or Clipping
All patients are treated under general anesthesia and systemic heparinization. A bolus of 50-75 IU/kg of heparin is given after femoral sheath placement, and intermittent boluses of 1250 IU per hour are given during the procedure. Activated clotting time is maintained at 2-3 times baseline level. Balloon-assisted coiling or stent-assisted coiling are considered in aneurysms with an unfavorable morphology (aneurysm neck≥ 4.0 mm or dome/neck ≤2.0). All anterior circulation aneurysms are clipped through a standard pterional or frontal temporal approach. The posterior circulation aneurysms are treated using far lateral approach depending on the aneurysm location.
Interventions
Learn about the drugs, procedures, or behavioral strategies being tested and how they are applied within this trial.
Coiling or Clipping
All patients are treated under general anesthesia and systemic heparinization. A bolus of 50-75 IU/kg of heparin is given after femoral sheath placement, and intermittent boluses of 1250 IU per hour are given during the procedure. Activated clotting time is maintained at 2-3 times baseline level. Balloon-assisted coiling or stent-assisted coiling are considered in aneurysms with an unfavorable morphology (aneurysm neck≥ 4.0 mm or dome/neck ≤2.0). All anterior circulation aneurysms are clipped through a standard pterional or frontal temporal approach. The posterior circulation aneurysms are treated using far lateral approach depending on the aneurysm location.
Eligibility Criteria
Check the participation requirements, including inclusion and exclusion rules, age limits, and whether healthy volunteers are accepted.
Inclusion Criteria
2. The maximum size of unruptured aneurysm ≤5mm;
3. Informed consent
Exclusion Criteria
18 Years
85 Years
ALL
No
Sponsors
Meet the organizations funding or collaborating on the study and learn about their roles.
RenJi Hospital
OTHER
Responsible Party
Identify the individual or organization who holds primary responsibility for the study information submitted to regulators.
Principal Investigators
Learn about the lead researchers overseeing the trial and their institutional affiliations.
Jieqing Wan, MD,PHD
Role: PRINCIPAL_INVESTIGATOR
Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
Central Contacts
Reach out to these primary contacts for questions about participation or study logistics.
References
Explore related publications, articles, or registry entries linked to this study.
Sonobe M, Yamazaki T, Yonekura M, Kikuchi H. Small unruptured intracranial aneurysm verification study: SUAVe study, Japan. Stroke. 2010 Sep;41(9):1969-77. doi: 10.1161/STROKEAHA.110.585059. Epub 2010 Jul 29.
Rahman M, Smietana J, Hauck E, Hoh B, Hopkins N, Siddiqui A, Levy EI, Meng H, Mocco J. Size ratio correlates with intracranial aneurysm rupture status: a prospective study. Stroke. 2010 May;41(5):916-20. doi: 10.1161/STROKEAHA.109.574244. Epub 2010 Apr 8.
Greving JP, Wermer MJ, Brown RD Jr, Morita A, Juvela S, Yonekura M, Ishibashi T, Torner JC, Nakayama T, Rinkel GJ, Algra A. Development of the PHASES score for prediction of risk of rupture of intracranial aneurysms: a pooled analysis of six prospective cohort studies. Lancet Neurol. 2014 Jan;13(1):59-66. doi: 10.1016/S1474-4422(13)70263-1. Epub 2013 Nov 27.
Brown RD Jr, Broderick JP. Unruptured intracranial aneurysms: epidemiology, natural history, management options, and familial screening. Lancet Neurol. 2014 Apr;13(4):393-404. doi: 10.1016/S1474-4422(14)70015-8.
Juvela S, Poussa K, Lehto H, Porras M. Natural history of unruptured intracranial aneurysms: a long-term follow-up study. Stroke. 2013 Sep;44(9):2414-21. doi: 10.1161/STROKEAHA.113.001838. Epub 2013 Jul 18.
Guresir E, Vatter H, Schuss P, Platz J, Konczalla J, de Rochement Rdu M, Berkefeld J, Seifert V. Natural history of small unruptured anterior circulation aneurysms: a prospective cohort study. Stroke. 2013 Nov;44(11):3027-31. doi: 10.1161/STROKEAHA.113.001107. Epub 2013 Sep 3.
UCAS Japan Investigators; Morita A, Kirino T, Hashi K, Aoki N, Fukuhara S, Hashimoto N, Nakayama T, Sakai M, Teramoto A, Tominari S, Yoshimoto T. The natural course of unruptured cerebral aneurysms in a Japanese cohort. N Engl J Med. 2012 Jun 28;366(26):2474-82. doi: 10.1056/NEJMoa1113260.
Tominari S, Morita A, Ishibashi T, Yamazaki T, Takao H, Murayama Y, Sonobe M, Yonekura M, Saito N, Shiokawa Y, Date I, Tominaga T, Nozaki K, Houkin K, Miyamoto S, Kirino T, Hashi K, Nakayama T; Unruptured Cerebral Aneurysm Study Japan Investigators. Prediction model for 3-year rupture risk of unruptured cerebral aneurysms in Japanese patients. Ann Neurol. 2015 Jun;77(6):1050-9. doi: 10.1002/ana.24400. Epub 2015 Apr 22.
Murayama Y, Takao H, Ishibashi T, Saguchi T, Ebara M, Yuki I, Arakawa H, Irie K, Urashima M, Molyneux AJ. Risk Analysis of Unruptured Intracranial Aneurysms: Prospective 10-Year Cohort Study. Stroke. 2016 Feb;47(2):365-71. doi: 10.1161/STROKEAHA.115.010698. Epub 2016 Jan 7.
Other Identifiers
Review additional registry numbers or institutional identifiers associated with this trial.
RJ2016144K1.0
Identifier Type: -
Identifier Source: org_study_id