There are about 371 clinical studies being (or have been) conducted in Guatemala. 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.
Primary Objectives: 1. To investigate the response rate (complete response plus partial response) of temozolomide for 8 weeks (2 cycles), in patients with retinoblastoma metastatic to the central nervous system (mass only) in two strata: - A. Initial diagnosis (mass) - B. At relapse (mass) 2. To determine hematologic toxicity: absolute neutrophil count (ANC), platelets and hemoglobin count. Secondary Objectives: 1. To determine the response in other metastatic sites (non target) (orbit, bone marrow, bone, lung, liver and others) 2. To determine the remission rate and time to relapse on temozolomide. 3. To document the response of leptomeningeal metastasis (cerebrospinal fluid) to temozolomide
Many children with the childhood cancer, Retinoblastoma, have surgery to remove the tumor and sometimes the entire eye. The purpose of this study is to collect the extra tissue from patients who undergo tumor removal for laboratory experiments that will help us understand not only what occurs in retinoblastoma cells but also how cells normally function. Some of these studies will include an evaluation of how cells control the way that genes are expressed, how cells "know" to become retinal cells, how cells remain retinal cells, how cells lose their identity as retinal cells, what changes make retinoblastoma cells different from normal retinal cells, and what changes make some retinoblastomas worse than others.
This multicenter, randomized, adaptive Phase II/III study will evaluate the efficacy and safety of trastuzumab emtansine (T-DM1) compared to standard taxane (docetaxel or paclitaxel) treatment in participants with human epidermal growth factor receptor 2 (HER2)-positive advanced gastric cancer. At the start of the trial (stage 1), participants will be randomized with a ratio 2:2:1 to one of three treatment arms: Arm A: trastuzumab emtansine 3.6 milligram per kilogram (mg/kg) per intravenous injection (IV) every 3 weeks; Arm B: trastuzumab emtansine 2.4 mg/kg IV every week; Arm C: standard taxane therapy (docetaxel 75 milligram per meter square [mg/m^2] IV every 3 weeks or paclitaxel 80 mg/m^2 kg IV every week per investigator choice). At the end of the first stage of the study, the dose and schedule of trastuzumab emtansine that will be used in the second stage of the study will be selected by an Independent Data Monitoring Committee (IDMC). The regimen selection analysis will be made after approximately 100 participants across all three study arms have been treated for at least 12 weeks. Once a trastuzumab emtansine regimen has been selected, Stage I participants who were assigned to the treatment arm which was selected for Stage II of the study and participants who were in the standard taxane group will continue to receive their assigned treatment regimen. Stage I participants who were assigned to the regimen that was not selected for further evaluation will continue to receive their assigned regimen and will continue to be followed for efficacy and safety. In Stage II of the study, additional participants will be recruited and randomized with a ratio 2:1 to either the selected regimen of trastuzumab emtansine or to the standard taxane therapy. Participants will receive study treatment until disease progression, unacceptable toxicity, initiation of another cancer therapy or withdrawal.
Freeman-Sheldon syndrome (FSS) is a rare human neuromusculoskeletal disorder present before birth, involving primarily limb and craniofacial deformities. The hypotheses in the present study of FSS and related conditions are: (1) FSS and related conditions are associated with higher rates of posttraumatic stress symptoms (PTSS), depression, and reduced quality of life than is observed in the general population; (2) persons close to an individual with FSS or related condition suffer similarly; and (3) current measures, which are single-disease specific (i.e., PTSS, depression, craniofacial deformities, or limb deformities), do not capture the unique picture of FSS and related conditions, which involve both limb and craniofacial deformities in an intellectually capable individual. There have been no studies looking at quality of life associated with FSS. Some authors have looked at quality of life in persons with facial differences; other authors have looked at bone and joint problems. Many other authors have looked at PTSS and depression caused by health problems and bad medical experiences. No authors have looked at these problems when they happen together, as they do in FSS. Because of the above, there may be differences in patients that have FSS versus patients in previous quality of life studies. The study will also develop and validate an outcomes-based quality of life survey for FSS and related conditions.
Nearly half of the adult population in Latin American urban settings has abnormally high blood pressure. Although half of these subjects with high blood pressure are still in the pre-hypertensive stage (systolic blood pressure values in the 120-139 mmHg range or diastolic blood pressure in the 80-89 mmHg range), the rate of progression to hypertension is high (10-20% per year), according to studies done in other settings. The main objective of this proposal is to evaluate the effectiveness of an affordable and sustainable primary health care intervention to reduce blood pressure and prevent progression from pre-hypertensive status to hypertension in individuals at poor urban clinics in Argentina, Guatemala, and Peru. Our primary hypotheses are that pre-hypertensive subjects who receive mHealth (mobile health) support for 12 months (intervention group) will have lower blood pressure compared to individuals who receive the usual primary health care (control group); and that pre-hypertensive subjects will maintain lower blood pressure six months after receiving mHealth support. The investigators will determine the effects of an intervention using mHealth technology, including short message services (SMS) and one-to-one telephone calls, to promote lifestyle modification focused on reducing blood pressure among participants. The intervention also aims to help participants become better informed, motivated, and encouraged to practice self-management of their own health; to improve patient satisfaction levels; provide tailored targeted interventions; and to improve patient-provider relationships. The proposal is designed as a proof-of-concept intervention in three Latin American countries that encompass a wide range of environments and health care settings. A total of 212 subjects (30-60 years old) per country will be recruited in primary health clinics and randomized to study groups. Blood pressure, anthropometry, and behavioral risk factors (physical activity, diet, stress, alcohol and tobacco use) will be measured at baseline and at months 6 and 12 during the intervention, and six months after the end of the intervention. The investigators will also evaluate feasibility, acceptability, cost-effectiveness, and process implementation of the intervention.
This protocol is for subjects with pulmonary arterial hypertension and is the first of 3 studies forming the Sitaxsentan efficacy and safety trial with Randomized Prospective Assessment of Adding Sildenafil (SR-PAAS) program.
This single arm study will assess the efficacy and safety of subcutaneous Mircera for the correction and maintenance of hemoglobin levels in predialysis patients with renal anemia who are not currently treated with ESA. Eligible patients will receive monthly subcutaneous injections at an initial recommended dose of 1.2 micrograms/kg. The anticipated time on study treatment is 3-12 months, and the target sample size is 100-500 individuals.
The primary objective of this study is to determine whether S-1 increases overall survival when compared to 5-Fluorouracil (5-FU) in patients with metastatic pancreatic cancer previously treated with a gemcitabine-based therapy. The secondary objectives are to compare: progression free survival, overall response rate, clinical benefit and improvement in tumor related symptoms and also to assess overall safety and pharmacokinetics of S-1.
The purpose of this study is to show that doripenem is as effective as imipenem-cilastatin in the treatment of patients with ventilator-associated pneumonia.
The objective is to evaluate whether once weekly subcutaneous (SC) injection of idrabiotaparinux is at least as efficient to prevent clots in brain and in the other organs than oral international normalized ratio (INR) adjusted-dose warfarin in patients with atrial fibrillation (AF).