Glibenclamide in Aneurysmatic Subarachnoid Hemorrhage

Study Overview
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Brief Summary
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A randomized, double-blind and prospective trial meant to evaluate the use of Glibenclamide on acute aneurysmatic subarachnoid hemorrhage. Patients will allocated randomly in two groups, one for 05 mg daily intake of glibenclamide for 21 days and another for control with placebo. General clinical data and late cognitive status will be accessed in both groups.

Detailed Description
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GASH is a double blind, prospective and randomized clinical trial centered on the University of Sao Paulo General Hospital. Patients will be recruited from neurological/neurosurgical intensive care units. Appropriate ethics and regulatory approvals will be sought for all subjects, according to the International Conference on Harmonization guidelines for good clinical practice (ICH GCP). Investigators will obtain informed written consent from all patients or their legal representative. Recruitment will take place between 2018 and 2019. Patients will be randomly assigned (1:1) to receive either glibenclamide 5mg or placebo. Coded boxes containing either 21 similar tablets of glibenclamide 5mg or placebo will be assigned a number. A computer-generated randomization code will be used to randomize patients by blocks of ten (five glibenclamide, five placebo). Each box will be identified by a code number specific and subsequently selected for distribution in ascending numerical order. Patients will start treatment as soon as possible within 96 h of the ictus, with a daily dose till the 21° day after the bleed. Trial medication consisted of one tablet a day, given orally or via a nasogastric tube. Aneurysm treatment, either by microsurgery or embolization, will be performed as soon as possible, according with the standard of care for the recruiting center. Nimodipine 60mg, every four hours, will be started on admission and continued till the 21° day after the ictus, in all patients as standard of care. Patient's demographics, medical history and relevant investigation results will be collected. The severity of the hemorrhage will be clinically assessed by World Federation of Neurosurgical Societies grading scale and radiologically using the modified Fischer scale. At 6 months of follow up patients will be interviewed with modified Rankin scale (mRS) questionnaire (a scale that measures degree of incapacity/ dependence and mortality after neurological events) by a nurse or a physician with no knowledge of treatment allocation. Psychologists will evaluate quality of life and cognitive performance using the short-form health survey questionnaire (SF-36) and neuropsychological tests. The main hypothesis is that, once compared with standard of care, glibenclamide 5mg will provide better clinical outcome and additionally will decrease mortality and improve quality of life and cognitive performance after 6 months. Sample size: It was estimated the sample size of 50 randomized patients to give 90% power at the 5% significance level (two-sided) to detect a treatment effect equivalent to an absolute increase of 7% in the proportion of patients with a favorable outcome (30-day mortality rate after subarachnoid hemorrhage approaches 50% and 25% of survivors present some degree of neurological morbidity25). This calculation was based on an ordinal analysis of the 6-month mRS (the primary outcome) assuming that the treatment effect follows a proportional odds model.

Official Title
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Glibenclamide in Aneurysmatic Subarachnoid Hemorrhage: A Prospective and Randomized Study

Conditions
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Subarachnoid Hemorrhage, Aneurysmal

Intervention / Treatment
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* Drug: Glibenclamide
* Other: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Radiological confirmatory evidence of an aneurysmal subarachnoid hemorrhage (by digital subtraction angiography, CT angiography, or magnetic resonance angiography) Presentation less than 96 h from ictus Exclusion Criteria: Patients taking glibenclamide therapy at presentation Pregnancy Hunt & Hess V Known renal or hepatic impairment Patient not fully independent before bleed, Strong suspicion of drug or alcohol misuse Patient taking warfarin-type drugs Suspected additional life-threatening disease

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Treated Patients<br>Patients who will receive Glibenclamide 05mg daily for 21 days, orally or by nasogastric tube. | Drug: Glibenclamide<br>* Placebo-controlled; Double blind test<br>|
| Placebo Comparator: Control Group<br>Patients who will receive amylum 05mg daily for 21 days, orally or by nasogastric tube. | Other: Placebo<br>* Amylum<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Modified Rankin Scale (early) | Evaluate patients life quality and morbidity, from 1 to 6 ('no symptoms' to 'Death') | To be measured on the 21th day of medication/control, when happens the end of intervention | 
| Short-Form Healthy Survey Questionnaire (SF-36) | Cognitive assessment and quality of Life measured by 11 questions that leads to a quantification scale called Raw Scale (RS). The RS identify 8 domains with a calculable score from 0 (worst) to 100 (best): Functional capacity; Limitation by physical aspects; Pain; General health; Vitality; Social aspects; Emotional aspects and Mental health. | To be executed 6 months after the end of intervention | 
| Modified Rankin Scale (late) | Evaluate patients life quality and morbidity, from 1 to 6 ('no symptoms' to 'Death') | To be measured 6 months after the end of intervention and compared with the early result | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Subarachnoid hemorrhage, Glibenclamide