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.
A multicenter study to evaluate the efficacy and safety of maintenance and long-term treatment administration of upadacitinib, an orally administered Janus kinase 1 inhibitor, in adult participants with Crohn's Disease.
Assessment of color vision in diabetic patients before and after the use of anti-vegf in the treatment of diabetic macular edema
Crack addiction has become a severe public health problem in Brazil. Crack users present elevated prevalence rates of psychiatric comorbidities, sexual transmitted infections and unemployment with high probability of living or have lived in the streets, history of incarceration and engagement in illegal activities. For the last 20 years a treatment called Contingency Management (CM) have achieved the best results regarding reduction of substance use, promotion of abstinence, treatment attendance and retention in treatment. The first CM study conducted in Brazil advocates for the efficacy of CM on all of these outcomes, suggesting that CM can be effective in a Brazilian population of crack users.
The purpose of this study is to demonstrate that injection cycles consisting of a single administration of paliperidone palmitate 6-month (PP6M) are not less effective than 2 sequentially administered injections of paliperidone palmitate 3-month PP3M) (350 or 525 mg eq.) for the prevention of relapse in participants with schizophrenia previously stabilized on corresponding doses of paliperidone palmitate 1-month (PP1M) (100 or 150 mg eq.) or PP3M (350 or 525 mg eq.).
This is a double-blind placebo controlled trial whose objective is to understand how much the radial extracorporeal shockwave therapy can improve function of patients with knee osteoarthritis. For this trial, patients with knee osteoarthritis, after signing the informed consent form and having their demographic and baseline information collected, will be randomly allocated into one of both treatment arms: radial extracorporeal shockwave therapy (rESWT) or sham radial extracorporeal shockwave therapy. Then, they will undertake three sessions of rESWT, for three weeks, i.e. one session per week. Patients will be assessed prior to the therapy, one week after the end of the therapy and three months after the end of the therapy, and the primary outcome of this study is the functional change measured by the Knee injury and Osteoarthritis Outcome Score (KOOS) validated in Portuguese, three months after the end of the therapy. Secondary outcomes, will be the change of pain, the change of pressure pain tolerance threshold, change in diffuse noxious inhibitory control (DNIC), and thermographic changes.
This clinical trial is performed as proof of pharmacological action investigation by demonstration of ovulation inhibition (dose-response study) under treatment with three Test vaginal rings releasing varying doses of estriol (E3) and trimegestone (TMG). Blood samples for determination of estradiol (E2) and progesterone (PG) levels will serve as pharmacodynamic surrogate parameters for characterization of the treatment effect on the endogenous hormones. Blood samples for determination of E3 and TMG in plasma will be collected in order to characterize pharmacokinetic parameters. Additionally, local tolerability characterized by gynecological inspection of the vaginal mucosa prior to and after insertion of the Investigational Medicinal Product (IMPs) is planned to be assessed
The children's susceptibility to respiratory problems is due to their anatomical and physiological characteristics; therefore, children with more severe clinical conditions may undergo invasive mechanical ventilation (IMV). However, its prolonged use favors tracheal injury, barotrauma and / or volutrauma, decreased cardiac output and oxygen toxicity, and especially the accumulation of respiratory secretions due to ineffective cough due to non-closure of the glottis and damage in the transport of mucus by the presence of the tracheal tube. Thus, triggering the development of mechanical ventilation-associated pneumonia (VAP), which is defined as a pulmonary infection that arises 48 to 72 hours after endotracheal intubation and the institution of invasive mechanical ventilation. As a consequence, respiratory work is performed by IMV, reducing the work exerted by spontaneous ventilation, causing neuromuscular disorders after 5 to 7 days of IMV, changes in muscle mechanics, reducing the capacity of the diaphragm to generate force, thus contributing to changes in modulation autonomic heart rate, changes in muscular trophism, generating physical deconditioning due to weakness and, finally, an increase in the length of hospitalization and immobilism. From this perspective, early mobilization emerges as a rehabilitation mechanism to improve muscle strength and joint mobility, as well as to improve lung function and respiratory system performance, as well as improved autonomic heart rate modulation. It can facilitate the weaning of IMV, reducing hospitalization time and promoting quality of life after discharge.
Introduction: It is well known that the infection caused by the Human Immunodeficiency Virus (HIV) is associated to a higher cardiovascular event risk. On the other hand, it is clear that the aerobic exercise training induces improvements in autonomic control and vascular function, through increases in vasodilator agents and blood vessels number. However, the investigators could not find previous works that studied the microvascular function in response to exercise training in HIV patients. Objectives: To study the impact of aerobic exercise training in endothelial function of HIV patients. In addition, the investigators will verify the association of the physical fitness to the nitric oxide bioavailability, angiogenesis and lipid profile in HIV patients. Methods: The study subjects will be composed by HIV patients, that will be randomly divided in two different groups: exercised and sedentary. The subjects will be tested before and after training in regards to endothelial function, nitric oxide bioavailability, physical fitness and lipid profile, through flowmetry, colorimetric essays, maximal cardiopulmonary exercise test, and biochemical tests; respectively. The exercise training will be performed in a treadmill for 12 weeks, 3 times a week, 40 minutes each section. Expected Results: The investigators expect to achieve markers that will help in understanding the interaction of HIV with several factors that contribute to an increased endothelial function after exercise training.
The purpose of this study is evaluate the effect of prophylactic desmopressin on blood coagulation parameters and postoperative bleeding in patients undergoing valve cardiac surgery with cardiopulmonary bypass.
Background: The administration of the intra-oral drugs was not capable of reducing this side effect, maybe the use of two analgesics may to present better analgesic effect to avoid the bleaching-induced tooth sensitivity (TS). Methods: A triple-blind, parallel-randomized clinical trial was conducted with 114 health patients who received either a placebo or an association of ketorolac tromethamine/acetaminophen. The first doses of two analgesic (Acetaminophen 750 mg/ Ketorolac Tromethamine 10 mg) or placebo was administered 1 h before the in-office bleaching (35% hydrogen peroxide), and extra doses were administered every 8 h for 48 h. The TS was recorded using 0-10 visual analog scale and a 0-4 numeric rating scale in different periods: during bleaching and from 1 h up to 6h, from 12 h up to 18h, from 18h up to 24 h, from 24h up to 48 h post-bleaching. The color was measured before and one month after dental bleaching with a visual shade guide Vita Classical, Vita Bleachedguide 3D-Master and spectrophotometer Vita Easyshade (Vita Zahnfabrik). The absolute risk of TS was evaluated by Fisher's exact test. Data of TS intensity with NRS scale of the two groups were compared with Mann-Whitney and Friedman tests, while data from the VAS scale were evaluated by two-way repeated measures ANOVA and Tukey's test for pairwise comparison. The color changes between groups were compared using a Student t-test (α = 0.05).