There are more than 498,563 clinical trials published worldwide with over 60,000 trials that are currently either recruiting or not yet recruiting. Use our filters on this page to find more information on current clinical trials or past clinical trials (free or paid) for study purposes and read about their results.
Over the past several decades, considerable effort has been expended toward the successful cryopreservation of various human cells. While attempts at cryopreservation have been directed at different tissue types, one of the most vigorously pursued targets has been reproductive tissue. Historically, cryopreservation of human sperm has existed for several decades. The earliest reports of pregnancies (Trounson et al., 1983) and births (Zeilmaker et al., 1984) from the cryopreservation of human embryos occurred in the early 1980s. Presently, the freezing and storage of human embryos following in vitro fertilization (IVF) is standard practice at most fertility clinics. In 2003, the CDC Assisted Reproductive Technology success rates report stated that 4,246 live births occurred out of 17,517 non-donor frozen embryo cycles. . Because the human egg is a relatively voluminous cell with abundant cytoplasm, crystallization at the time of freezing may result in damage to the organelles. Secondly, a mature metaphase II oocyte contains a fragile spindle apparatus involved in cleavage. The purpose of this research study is to evaluate a method of freezing and thawing oocytes. This evaluation will be made by comparing the survival rates and rates of fertilization, cleavage and embryo quality of fresh oocytes and frozen-thawed oocytes which will be inseminated during the IVF (in vitro fertilization) treatment cycle. In addition, the same comparisons will be made between frozen oocytes from infertile women and those of egg donors. You are being asked to be in this study because you are currently undergoing in vitro fertilization.
A sedentary lifestyle is known to be a risk factor to developing type 2 diabetes. The aim of this study was to determine the effects of adding regular Nordic walking to daily physical activity. Effects on quality of life, cardiovascular risk factors and functions in muscle cells will be determined.
The purpose of the present study was to clarify the effects of increase in physical activity on incidence and surrogate marker of cardiovascular diseases. The working hypothesis of the present study was that the physical activity to satisfy the Japanese guideline of Ministry of Health, Labour and Welfare is effective for the primary prevention of the lifestyle-related disease.
Closer examination of granular lipid data in a large population offers numerous opportunities to generate new knowledge, ranging from studies examining concordance between commonly used lipid parameters to phenotypic characterization of rare or extreme disorders of lipid metabolism, opening possibilities to better personalize future treatment of abnormal blood lipids. STUDY POPULATION: The Very Large Database of Lipids (VLDL) includes adults and children who were clinically referred for a Vertical Auto Profile (VAP). Patient samples originated predominantly from outpatient primary care clinics in the U.S. (85%), along with specialty clinics and inpatient settings. LIPID MEASUREMENTS: The VAP test (VAP Diagnostics Lab, Birmingham, Alabama, USA) directly measures cholesterol concentrations of low density lipoprotein, very low density lipoprotein, intermediate density lipoprotein, high density lipoprotein, their subfractions, and lipoprotein(a). Triglycerides in the database are directly measured using the Abbott ARCHITECT C-8000 system (Abbott Park, Illinois, USA). Lipid distributions in the database closely match those from the population-representative National Health and Nutrition Examination Survey (NHANES). STUDY PROCEDURES: This database was investigator-initiated. Only de-identified data reach the investigational site. The master database is housed at The Johns Hopkins Hospital in Baltimore, Maryland, and maintained by Drs. Jones and Martin. The current database (2nd harvest) includes 5,051,467 patients whose laboratory samples were collected from October 1, 2015 and June 30, 2019. Only electronic data, and not blood samples, are sent to Hopkins. The academic investigators have unrestricted access to study data, take responsibility for the accuracy of analyses, and have authority over manuscript preparation and submission. VARIABLES: The variables currently in the VLDL database are testing date, age, sex, fasting/nonfasting, and components of the VAP test. From these primary variables, many additional variables were derived for inclusion in the master database. Other analytes measured by validated assays in subsets of the VLDL database include apolipoprotein B (apoB), apolipoprotein A1 (apoAI), high-sensitivity C-reactive protein (hsCRP), homocysteine, uric acid, insulin, hemoglobin A1c, 25-hydroxy vitamin D, cystatin C, lipoprotein-associated phosphatase (Lp-PLA2), thyroid stimulating hormone (TSH), free T3 and T4, pro-brain natriuretic peptide (pBNP), direct bilirubin, creatine phosphokinase (CPK), creatinine and other components of the comprehensive metabolic panel, magnesium, and phosphate.
To improve the diagnostic and prognostic utility of various biomarkers, detailed patient's history, physical examinations and technical devices in patients presenting with acute dyspnea.
The purpose of the project is to evaluate the efficacy of cognitive behavioral therapy (CBT) for adults with attention deficit hyperactivity disorder (ADHD) with and without stimulant medication and compare it to medication alone. Subjects will be randomly assigned to stimulant medication only, CBT only and combined CBT and stimulant medication group. Patients will be evaluated at baseline, following mediation optimization (for medicated groups), following 12 months of treatment, after 3 months of follow up, and after 6 months of follow up. The investigators hypothesize that the combined group will have the best outcome at all evaluation points. ADHD in adults is associated with significant morbidity and impaired academic, occupational, social, and emotional functioning. Developing optimal treatment approaches for this population is key in improving their functioning.
1. Endobronchial ultrasonography (EBUS) is useful in localizing peripheral lung lesions. The EBUS, further combined with the guide sheath (GS) technique, has been reported to increase the yield of transbronchial biopsy. However, there are no reports comparing the GS technique and the traditional EBUS technique in diagnosing the peripheral lung tumor. 2. Previous reports have revealed that several characteristic echoic patterns correlate well with the histopathological findings of benign and malignant lesions. Therefore, EBUS may also be useful in the differential diagnosis of malignant lesions of the lung.
Critical limb ischemia is a condition where the blood circulation in the limbs, in most cases the legs, is decreased so that pain and non healing wounds ensue. Mostly, this is a sequel of arteriosclerosis and/or diabetes. If surgical and other methods for the improvement of blood supply for the leg have failed or are not possible, most of these patients will proceed to amputation of the leg. Bone marrow contains cells which can induce and augment the growth of new, small arteries called collateral arteries. It has been shown in animals and in some case series that the transplantation of a concentrate of the patient's own bone marrow with stem cells into the ischemic limb can improve the blood circulation via the induction of collateral growth. However, it is not known if this bone-marrow stem cell induced collateral growth is sufficient to avoid otherwise necessary amputations. Therefore, we conduct a study to compare the efficiency of concentrated bone marrow cells injected into the critically ischemic limb compared to a placebo procedure where only saline is injected. We think that the transplantation of autologous bone marrow will reduce the number of necessary leg amputations, reduce pain and induce wound healing. In this investigation, patients with limb threatening ischemia are randomly allocated either to the bone marrow group or to the placebo group. Patients in the bone marrow group will have their bone marrow harvested under sedation, and the bone marrow cells are concentrated. The cell concentrate will then be injected directly into the muscle of the diseased leg. Patients in the placebo group will undergo sedation as well but no bone marrow harvest is done, and saline is injected into the ischemic leg. The procedure will require about 1.5-2 hours, and the subjects will be admitted to a participating vascular Centre. Monthly examinations up to three months after the bone-marrow or placebo procedure are done. After the follow-up of three months, the rate of death and amputations and the wound healing process are compared between groups. Adverse and serious adverse events will be recorded during this time period. Diagnostic studies will be obtained to measure blood flow in the treated leg during the follow up period and include skin oxygen measurements, pressure recordings in the leg and arteriography. Also, quality of life, pain and wound healing will be assessed. After completion of the three months study participation, subjects who have been treated with placebo will be able to receive open-label bone marrow transplantation therapy.
Although mosquito coils are widely used, there is no robust evidence that their use can provide clinical reduction in malaria. This study will randomise 4 groups of 400 houses, each with 5 people, in rural China and monitor cases of malaria in each group each month for 6 months. The treatment groups will include Coils, Treated bed nets, Coils plus treated bed nets, or no treatment (control). All cases detected will be given prompt appropriate treatment.
Glucose control has been shown as an important and independent prognostic factor in several acute conditions in hospitalized patients, including Acute MI, stroke, cardiac surgery and in critical care units. Patients with acute exacerbation of COPD (AECOPD)and diabetes treated with insulin had a longer in-patient stay and more frequent isolation of Gram negative bacteria from sputum than those without diabetes.Hyperglycemia (>11 mmol/l) on admission predicted failure of non-invasive ventilation and infectious pulmonary complications in patients admitted to the ICU with acute respiratory failure caused by severe AECOPD. The primary goal of this study is to test the hypothesis that in AECOPD, tight glycemic control during hospital stay will improve outcome of hospitalization. The secondary goal of this study is to test new ways in controlling patients in the internal medicine ward.