Chinese Small Intracranial Aneurysm Study (CSIAS)

NCT02948504 | Unknown

• 1 other identifier: RJ2016144K1.0
• Study Type: observational
• Target: 500
• Locations: 0 countries
• Sites: N/A

Brief Summary

Intracranial aneurysms are common in the general population. The overall prevalence of unruptured intracranial aneurysms (UIAs) is estimated of 2.3-3.2% in the population without specific risk factors for SAH. As noninvasive imaging modalities are more commonly used than before, UIAs are increasingly being detected. Most patients with small aneurysms (less than 5mm) are incidentally found in clinical practice. Some studies indicate that the majority of patients with UIAs, particularly with small aneurysms (\<7mm), have a low risk of rupture, and others have found that small ruptured aneurysms have a high proportion in patients with SAH. Therefore, there is a lot of controversy regarding which small aneurysms can be left untreated, or which aneurysms are needed to be treated with clipping or coiling. 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.

Conditions

Intracranial Aneurysm; Unruptured Cerebral Aneurysm; Treatment Side Effects

Keywords

Unruptured Intracranial Aneurysm; Small aneurysms; Risk of rupture; Natural history; Endovascular Coiling; Surgical clipping

Outcome Measures

Primary Outcomes (1)

• Rupture of an unruptured aneurysm

  These aneurysms are left untreated.

  One year of follow-up

Secondary Outcomes (3)

• Regrowth of an unruptured aneurysm

  9 and 12 months of imaging follow-up

• Recurrence and retreatment after coiling or clipping

  one year of follow-up

• Poor outcome after coiling or clipping

  6 and 12 months

Other Outcomes (1)

• Procedural complications

  30 days after coiling or clipping

Study Arms (2)

Observation

Aneurysms are left untreated based on patients and family's wishes. These patients will be included in the observation 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.

Procedure: Coiling or Clipping

Interventions

Coiling or Clipping PROCEDURE

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.

Coiling or Clipping

Eligibility Criteria

• Age: 18 Years - 85 Years
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Five hundred patients with unruptured aneurysms will registered in this study during the 3 years.

You may qualify if:

• Intracranial unruptured aneurysms confirmed by digital subtraction angiography DSA, CT angiography or MR angiography (MRA);
• The maximum size of unruptured aneurysm ≤5mm;
• Informed consent

You may not qualify if:

• Patients with severe systemic disorders and expected life span less than one year; 2.Pregnant or lactating women.

Sponsors & Collaborators

• RenJi Hospital: lead

Related Publications (9)

• 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.

  PMID: 20671254 BACKGROUND

• 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.

  PMID: 20378866 BACKGROUND

• 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.

  PMID: 24290159 BACKGROUND

• 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.

  PMID: 24646873 BACKGROUND

• 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.

  PMID: 23868274 BACKGROUND

• 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.

  PMID: 24003049 BACKGROUND

• 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.

  PMID: 22738097 BACKGROUND

• 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.

  PMID: 25753954 BACKGROUND

• 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.

  PMID: 26742803 BACKGROUND

MeSH Terms

Conditions

Intracranial Aneurysm

Condition Hierarchy (Ancestors)

Intracranial Arterial Diseases; Cerebrovascular Disorders; Brain Diseases; Central Nervous System Diseases; Nervous System Diseases; Aneurysm; Vascular Diseases; Cardiovascular Diseases

Study Officials

• Jieqing Wan, MD,PHD

  Department of Neurosurgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Bing Zhao

CONTACT

08613601696475; drzhaobing@yahoo.com

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: October 26, 2016
• First Posted: October 28, 2016
• Study Start: December 1, 2016
• Primary Completion: December 1, 2018
• Study Completion: December 1, 2018
• Last Updated: November 15, 2016

Record last verified: 2016-11

Data Sharing

• IPD Sharing: Will not share