View clinical trials related to Atrophy.
Filter by:Background: Age-related macular degeneration is a common eye disease in people over 50. The "dry" form of the disease can worsen into geographic atrophy, causing blind spots. Researchers want to learn if replacing older eye cells with younger ones can help treat this disease. Objective: To test the safety of putting cells inside the eye as a possible future treatment for dry age-related macular degeneration. Eligibility: People ages 55 and older who have geographic atrophy with loss of vision. People who have had "wet" macular degeneration in study eye are NOT eligible. Design: Participants will be screened with: - Medical history - Physical exam - Blood and urine tests - Eye exam - Eye photos - Fluorescein angiography. An intravenous (IV) line is placed in an arm vein. A dye is injected. A camera takes pictures of the dye as it flows through the eyes' blood vessels. - Electroretinography. An electrode is taped to participants' forehead. They sit in the dark. After 30 minutes, numbing eye drops and contact lenses are placed in their eyes. They watch flashing lights. - Tuberculosis test - Chest X-ray - Electrocardiography. Sticky pads are placed on participants' chest to record the heart's electrical activity. Participants will have at least 14 study visits over 5 and a half years. They will repeat screening tests. Participants will have retinal pigment epithelium (RPE) transplantation surgery in one eye. For this, cells from participants' blood are turned into RPE cells. These cells are placed in their eye through a cut in their retina. They will get dilating eye drops, an IV line, and anesthesia that may make them sleep. A gas bubble will be put in their eye to help it heal. Participants will receive immunosuppressive medications to avoid transplant rejection. Participants will be contacted yearly for up to 15 years.
Inspiratory muscle weakness develops rapidly in ventilated critically ill patients and is associated with adverse outcome, including prolonged duration of mechanical ventilation and mortality. Surprisingly, the effects of critical illness on expiratory muscle function have not been studied. The main expiratory muscles are the abdominal wall muscles, including the external oblique (EO), internal oblique (IO) and transversus abdominis muscles (TRA). These muscles are activated when respiratory drive or load increases, which can be during e.g. exercise, diaphragm fatigue, increased airway resistance, or positive airway pressure ventilation. The abdominal wall muscles are also critical for protective reflexes, such as coughing. Reduced abdominal muscles strength may lead to decreased cough function and thus inadequate airway clearance. This will lead to secretion pooling in the lower airways, atelectasis, and ventilator associated pneumonia (VAP). Studies have shown that decreased cough function is a risk for weaning failure and (re)hospitalization for respiratory complications. Further, high mortality was found in patients with low peak expiratory flow. Considering the importance of a proper expiratory muscle function in critically ill patients, it is surprising that the prevalence, causes, and functional impact of changes in expiratory abdominal muscles thickness during mechanical ventilation (MV) for critically ill patients are still unknown. Ultrasound is increasingly used in the ICU for the visualization of respiratory muscles. In a recent pilot study the investigators confirmed the feasibility and reliability of using of ultrasound to evaluate both diaphragm and expiratory abdominal muscle thickness in ventilated critically ill patients (manuscript in preparation). Accordingly, the primary aim of the present study is to evaluate the evolution of abdominal expiratory muscle thickness during MV in adult critically ill patients, using ultrasound data.
Transcranial magnetic stimulation (TMS) is a procedure that has been shown to improve fatigue in chronic sufferers. It uses a plastic covered coil that sends a magnetic pulse through the skull into the brain and by targeting particular areas in the brain it can be used to help modulate the perception of fatigue. The study intends to use this technique to treat such a disabling symptom in patients who suffer from Multiple System Atrophy (MSA). Initially the aim is to study this technique in 22 MSA patients who are suffering from fatigue . These patients would require an resting-state funtional MRI before and after the stimulation. The stimulation would be performed ten sessions and the patients would be assessed by a clinician using well recognized clinical tools. It is anticipated that there will be a meaningful improvement in fatigue. It is also anticipated that TMS is a safety technique to use in MSA patients . Our findings will revealed that fatigue may be associated with an altered default mode network and sensorimotor network connectivity in MSA patients. We hypothesize that these divergent motor and cognitive networks connectivity changes and their adaptive or maladaptive functional outcome may play a prominent role in the pathophysiology of fatigue in MSA.
A randomized controlled clinical multi center trial to assess the efficacy of a combination of autologous mesenchymal stem cells and biomaterial in jaw bone regeneration prior to dental implant placement in comparison to standard autologous bone block grafting.
This study evaluates the efficacy and security of laser for atrophy treatment. Half of participants will receive the laser treatment and the other half placebo.
Gastric cancer is the third most common cause of cancer-related death worldwide (1). Upper endoscopy is necessary to detect neoplastic macroscopic features at an early stage, but subtle abnormalities in the gastric mucosa are often missed or misdiagnosed (1). Helicobacter pylori (Hp) is involved in the pathogenesis of gastric diseases, such as, peptic ulcers, gastric lymphoma, and gastric cancer. Therefore, the necessity to recognize malignant gastric lesions at an early stage is imperative.
This randomized controlled trial will study the effects of peanut protein supplementation on changes in muscle size and quality in patients undergoing total knee arthroplasty.
Spinal muscular atrophy (SMA) is a form of motor neuron disease, most commonly caused by a mutation in the survival motor neuron 1 gene (SMN1) which results in a wide disease spectrum affecting children and adults. It is an autosomal recessive disorder and is therefore caused by inheritance of a mutated gene from each parent. All forms of SMA have an estimated combined incidence of 1 in 6,000 to 1 in 10,000 live births, with a carrier frequency of 1/40 to 1/60. The patient registry aims to facilitate a questionnaire-based research study in order to better characterise and understand the disease in the UK and in Ireland. Entry is via self-registration over a secure internet connection (https://www.sma-registry.org.uk/). Online, patients are asked to read an information sheet about the research project and then indicate their consent to demonstrate willingness to participate. Following online consent, subjects will be entered into the registry. This is an on-going database and all participants are invited to update their information on a biannual basis.
The primary objectives of the study are to assess the safety, tolerability and evidence of activity of 12 months oral treatment with TEFIDERA® in subjects with Geographic Atrophy associated with Age-Related Macular Degeneration (AMD).
The purpose of this study is; compare respiratory function parameters and respiratory muscle strength in patients with MSA compare to healthy controls, and to evaluate the results of SNIP and PImax in measuring inspiratory muscle strength in MSA patients.