Clazosentan in Aneurysmal Subarachnoid Hemorrhage (NCT00940095) | Clinical Trial Compass
TerminatedPhase 3
Clazosentan in Aneurysmal Subarachnoid Hemorrhage
Stopped: Lack of efficacy data from the Phase 3 clinical study (AC-054-301; CONSCIOUS-2)
United States, Argentina, Australia577 participantsStarted 2009-07-01
Plain-language summary
The aim of this study is to demonstrate that clazosentan, administered as a continuous intravenous infusion at either 5 mg/h or 15 mg/h until Day 14 post aneurysmal subarachnoid hemorrhage (aSAH), reduces the incidence of cerebral vasospasm-related morbidity and all-cause mortality within 6 weeks post-aSAH treated by endovascular coiling.
The primary endpoint of the study is the occurrence of cerebral vasospasm-related morbidity, and mortality of all-causes within 6 weeks post-aSAH, defined by at least one of the following:
1. Death (all causes).
2. New cerebral infarct(s) due to cerebral vasospasm as either the primary or relevant contributing cause, or not adjudicated to be entirely due to causes other than vasospasm.
3. Delayed ischemic neurological deficit (DIND) due to cerebral vasospasm as either the primary or relevant contributing cause, or not adjudicated to be entirely due to causes other than vasospasm.
4. Administration of a valid rescue therapy in the presence of confirmed cerebral vasospasm on angiography (DSA or CTA).
An independent Critical Events Committee (CEC) will adjudicate whether or not patients meet the primary endpoint and its individual morbidity components.
Who can participate
Age range
18 Years – 75 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Males and females aged 18 to 75 years (inclusive).
. Patients with a ruptured saccular aneurysm, confirmed by angiography (digital subtraction angiography \[DSA\] or computed tomography angiography \[CTA\], investigator's assessment), and which has been successfully\* secured by endovascular coiling. The time of aneurysm rupture must be known or possible to estimate with a reasonable degree of certainty.
. World Federation of Neurological Surgeons (WFNS) grade I-IV measured prior to the endovascular coiling procedure, and which does not worsen to grade V post-procedure (based on regular Glasgow Coma Scale \[GCS\])
. Patients with any thick clot (short axis \> or = 4 mm) on baseline CT scan (investigator's assessment).
. Women of childbearing potential must have a negative serum pregnancy test and must use a reliable method of contraception during the 12 weeks following study drug discontinuation.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Cerebral vasospasm-related morbidity and mortality of all-causes as defined by the protocol
. Written informed consent to participate in the study must be obtained from the patient or a legal representative prior to initiation of any study-mandated procedure and randomization.
Exclusion criteria
. Subarachnoid hemorrhage (SAH) due to causes other than saccular aneurysm.
. Giant aneurysms (height or width \> or = 25 mm).
. Intraventricular or intracerebral blood, in absence of subarachnoid blood, or or with only a thin clot (short axis \< 4 mm)
. Cerebral vasospasm on angiography (investigator's assessment) prior to endovascular coiling (intraprocedural cerebral vasospasm is not an exclusion criterion).
. A major complication during the endovascular coiling procedure, such as massive intracranial bleeding, intracranial thromboembolism, coil migration, aneurysm perforation or rupture, arterial dissection, major arterial occlusion, a large territorial cerebral infarct defined as involving \> 1/3 of a vascular territory, or a new major neurological deficit post-procedure (e.g., hemiplegia or aphasia lasting \> or = 12 hours post-aneurysm coiling)\*.
. Current ruptured aneurysm previously secured (successfully or not) by clipping.
. Coiling material used, which has not been approved by local health authorities.
. Use of liquid embolism aneurysmal treatment or flow diverting device.