DELTA Trial: Does Embolization With Larger Coils Lead to Better Treatment of Aneurysms Trial
Completed · Not applicable
Conditions studied: Cerebral Aneurysm
In brief
Endovascular treatment with platinum coils is safe and effective in preventing rebleeding of intracranial aneurysms. Unfortunately, endovascular treatment of aneurysms with coils has been associated with incomplete occlusion at initial treatment (remnant) or at follow-up (recurrence). This in some studies has been as high as 20%. While many such aneurysm remnants or recurrences exhibit benign behavior, many require retreatment to prevent future hemorrhage. A recent randomized controlled trial of aneurysm coiling revealed that aneurysms between 2 and 9.9 mm diameter were more likely to have an improved angiographic and composite clinical outcome when treated with hydrogel-coated coils, an improvement inferred to result from higher packing density afforded by hydrogel expansion(1). The use of hydrogel coils is associated with technical difficulties related to expansion and limited time for deployment. The investigators theorize that similar results could be achieved by using more voluminous bare platinum coils, leading to improved packing density compared to smaller caliber coils, and thus result in lower incidence of remnants or residuals. The relationship between packing densities and composite clinical endpoints having never been shown in a robust fashion, the investigators therefore propose a randomized clinical trial opposing coiling with soft 15-caliber coils to 10-caliber bare platinum coils in aneurysms varying in size from 3 to 9.9 mm. To test the hypothesis that 15-caliber coiling systems are superior to standard 10-caliber coils in achieving better composite outcomes, the investigators propose the DELTA trial: Does Embolization with Larger coils lead to better Treatment of Aneurysms trial, a randomized controlled blinded trial with 2 subgroups of 282 patients each, 564 total: Subgroup 1: Coiled with a maximum proportion of 15-caliber coils as conditions allow Subgroup 2: Coiled with 10-caliber coils.
Key facts
- Study ID
- NCT01943591
- Run by
- Centre hospitalier de l'Université de Montréal (CHUM)
- People needed
- 210
- Starts
- 2013-11-13
- Expected to finish
- 2018-12-05
- Last updated by the study team
- 2020-01-22
Who can join
Age: 18 and older. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- At least one ruptured or unruptured aneurysms with a dimension ≥ 10 mm (longest axis)
- for ruptured lesions, patients should be in World Federation of Neurosurgical Societies (WFNS) grade < IV.
- The anatomy of the lesion is such that endovascular treatment is possible with both types of coils (not necessarily certain or probable)
- Patient is 18 or older
- Life expectancy is more than 2 years (able to complete follow-up)
You may not qualify if…
- Patients with planned treatment of an associated cerebral arteriovenous malformations
- When parent vessel occlusion, without simultaneous endosaccular coiling of the aneurysm, is the primary intent of the procedure
- Any absolute contraindication to endovascular treatment, angiography, or anaesthesia such as severe allergies to contrast or medications
Where it is running
- University of Illinois at Chicago — Chicago, Illinois, United States
- University of Massachusetts Medical School — Worcester, Massachusetts, United States
- Stony Brook University Medical Center (SUNY) — Stony Brook, New York, United States
- SUNY Upstate Medical University — Syracuse, New York, United States
- Medical University of South Carolina — Charleston, South Carolina, United States
- University of Tennessee Medical Center — Knoxville, Tennessee, United States
- University of Virginia Health System — Charlottesville, Virginia, United States
- West Virginia University Hospital — Morgantown, West Virginia, United States
- Foothills Medical Center — Calgary, Alberta, Canada
- University of Alberta Hospital — Edmonton, Alberta, Canada
- Queen Elizabeth II Health Sciences Centre — Halifax, Nova Scotia, Canada
- McMaster University, Hamilton General Hospital — Hamilton, Ontario, Canada
- Ottawa Hospital — Ottawa, Ontario, Canada
- Toronto Western Hospital — Toronto, Ontario, Canada
- Centre Hospitalier de l'Université de Montréal — Montreal, Quebec, Canada
Full record on ClinicalTrials.gov
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