There are about 10004 clinical studies being (or have been) conducted in Brazil. The country of the clinical trial is determined by the location of where the clinical research is being studied. Most studies are often held in multiple locations & countries.
Up to 40% of Obsessive-Compulsive Disorder (OCD) patients do not respond to conventional treatments (medications or behavior therapy). For some of them, a neurosurgical treatment can be indicated. Among various surgical techniques, Gamma Knife radiosurgery has the advantage of not requiring the production of burr hole openings in the skull. However, there are no randomized controlled trials of radiosurgical procedures. The investigators' aim is to investigate whether radiosurgery for the treatment of severe and refractory OCD is efficacious and safe, by a double-blind, randomized controlled trial. Forty-eight refractory OCD patients will be randomized into two different groups: the first one will receive standard radiosurgery; the second group will be submitted to a false radiosurgery ("sham operation"). Patients who had been previously submitted to sham surgery will be able to undergo real operations after one year of follow-up, when blinding is broken. For a minimum period of one year, patients will be periodically followed-up in terms of psychiatric changes (including OCD symptoms), global functioning, cognitive/personality changes and neuroimaging findings.
The purpose of this study is to assess the efficacy of repeated subcutaneous (under the skin) injections at different doses of BIM 23A760 on growth hormone and insulin-like growth factor-1 levels in patients with acromegaly after 6 months of treatment.
The purpose of this study is to see whether apadenoson is as effective as adenosine when used as a pharmacological stress agent in myocardial SPECT-Imaging to detect defects in the supply of blood to the heart muscle (myocardial perfusion defects). The study will also look at whether apadenoson is better tolerated than adenosine when used in SPECT-MPI.
The main objective of this study is to test prospectively the performance of an algorithm stratified by an index based on neutrophil counts in association with galactomannan assay and image tests to start an antifungal early therapy (empirical/preemptive) in neutropenic patients. Ths specific objectives are to determine the overall incidence of invasive fungal infections, use of antifungal agents, duration of hospitalization and mortality in this cohort, and to evaluate if this strategy is associated with a reduction in the expected use of antifungal agents if a classical empiric antifungal strategy was used, without an increase in the incidence of invasive fungal infections. This is a prospective, non randomized, non comparative study. Patients aged ≥ 18 years are eligible if they have acute leukemia, myelodysplasia or other baseline disease submitted to chemotherapy or to allogeneic stem cell transplantation with an expected duration of neutropenia (neutrophil count <500cells/mm³) of at least 10 days. Exclusion criteria are patients with and a past history of or invasive mold infection and those who do not want to participate. The study has no comparator arm. However, the investigators intend to determine if the algorithm based on the D-index would result in a 50% reduction in the use of antifungal agents, if all patients with persistent fever and neutropenia received empiric antifungal therapy. Based on our database of ~2,000 episodes of febrile neutropenia, 36% of patients had persistent fever between days 4 and 7 of antibiotics and would receive empiric antifungal therapy. A total of 105 patients will be needed to demonstrate a 50% reduction in antifungal use if the investigators compared this cohort with a matched control historical cohort (alpha = 5%, beta = 20%).
A Phase 3, multicenter, randomized, double-blind, controlled study to evaluate the efficacy and safety of peramivir administered intravenously in addition to standard of care compared to standard of care alone in adults and adolescents who are hospitalized due to serious influenza.
The study will assess the use of paliperidone palmitate compared with oral risperidone in delaying time to relapse in patients recently diagnosed with schizophrenia who are at high risk of relapse.
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.
The objective of Series III Run-In Trial is to compare the performance and efficacy of the Supralimus® sirolimus-eluting stent with the Xience V™ everolimus-eluting stent with respect to in-stent luminal late loss at 9 months as assessed by off-line QCA. Ninety percent power to reject the null hypothesis that the Supralimus® stent is inferior to Xience V™ in favor of the alternative hypothesis that the Supralimus® stent is not inferior to Xience V™.
Acute renal insufficiency (ARI) represents a frequent and serious complication in patients submitted to cardiac surgery, and is associated with increases in time of hospitalization, costs, morbidity and mortality. Its incidence varies from 3.5% to 31%. The present study aims to evaluate renal function and oxidative stress in patients submitted to revascularization surgery with extracorporeal circulation (ECC), comparing targeted venous anesthesia controlled with propofol and inhalational anesthesia with isoflurane.
The purpose of this trial is to determine if intravenous administration of the metal ion trapping agent DP-b99 up to 9 hours following acute ischemic stroke onset, and then for 3 additional days (4 consecutive days in total) is effective in improving long term outcome. Patients will be followed up for 3 months after the stroke.