All clinical trials

Official title: Sensitivity and predictive value of functional cine magnetic resonance imaging (MRI) detecting intra-abdominal adhesions Background: Adhesions are a frequent problem in abdominal surgery. The formation of adhesions is part of a normal wound healing. However in some patients adhesions cause severe complications such as chronic pain, obstruction and strangulation of the bowel. Adhesions can also obstruct access to the peritoneal cavity and complicate reoperations. Accurate imaging of adhesions would be of benefit avoiding adhesion related complications at repeated laparotomy or laparoscopy. At present no validated diagnostic tool mapping adhesions exists. Purpose: To define the sensitivity and specificity of functional cineMRI in detecting and mapping adhesions in patients undergoing reoperation. Design: Prospective multicenter observational trial Primary outcome: Sensitivity and specificity of functional MRI detecting adhesions to the abdominal wall Secondary outcome: Sensitivity and specificity of functional MRI detecting organ-to-organ adhesions. Estimated enrollment: 100 Estimated study completion date: dec 2019 Estimated primary completion date: dec 2019

The investigators' goal is to identify the mutation in the gene that is responsible for the development of segmental dysplastic nevi. To identify the gene the investigators may use a candidate gene approach (i.e. sequence specific genes that are thought to be involved: NRAS, BRAF, etc) or a genome-wide approach trying to implicate regions in the genome (Loss-of-heterozygosity or copy number changes on comparative genomic hybridization).

The objective of this study is to determine the incidence of delirium in adults patients who are admitted at the critical care unit of a Dutch University Hospital with the mapping of relevant delirium risk factors The primary aim is to validate the investigators' developed delirium prediction model for critical care patients. A secondary aim is to find differences between delirious patients and non-delirious patients on different aspects of diagnostics, treatment and care, outcome, length of stay, and inflammation. According to Dutch law, the need to obtain informed consent was waived by the Committee on Research Involving Human Subjects (CMO) of Nijmegen for this observational study (2007/283).

Background: The extent of increase in systolic pulmonary arterial pressure (PAPs) during exercise in patients with COPD is unpredictable from lung function data. The non-invasive assessment of pulmonary hemodynamics during exercise and flow-mediated vasodilatation measurement may give useful data in the rehabilitation of COPD patients. Methods: Patients with stable, severe COPD and healthy, age-matched subjects (H) perform semi supine echocardiography with PAPs measurement. COPD patients perform ramp protocol with gas exchange detection. Serum hsCRP level is also determined in COPD patients. Endothel dysfunction is detected by flow mediated vasodilation measurement after arm strangulation with Doppler ultrasonography. Primary endpoint: The degree of pulmonary artery systolic pressure change during exercise? Secondary endpoint: The degree of right ventricular function change during exercise? Is endothel dysfunction manifested with pulmonary artery pressure rise? What is the correlation between the systemic inflammatory marker hsCRP and the degree of pulmonary artery pressure rise?

Small body size at birth, slow weight gain during infancy and increase in body mass index after 2 years are independent risk factors for cardiovascular disease and the metabolic syndrome. There is a large gap in our understanding of how early growth affects the cardiovascular system. Possible mechanisms include alterations in body composition, in cardiac structure, in vascular function, in renal function and epigenetic processes. The Objective is to determine how size at birth and growth during infancy and childhood affect: body composition, cardiac structure and function, vascular and endothelial function, renal function, metabolic status and transcriptional and epigenetic characteristics.

The Chinese Cerebral Aneurysms Survey is a continuing prospective study among middle-aged and older individuals (35 - 75 years) that aims to determine the prevalence of cerebral intracranial aneurysms in the general population with MRA at 3.0 Tesla (T).

Choroidal neovascularisation in age related macular degeneration is one of the major causes of legal blindness in the western world existing in two major occurences, the dry and the wet form.The etiology of age related macular degeneration is yet unknown. Genetic factors, oxidative stress, Ischaemia, and aging of the retinal pigment epithelium are discussed as etiologic factors. The risk of rapid vision loss is much higher in wet AMD, a dry form may transform to a wet form. From a prior study the investigators know that the posterior hyaloid is significantly more frequent attached in wet AMD. This study is conducted to examine whether the attached posterior hyaloid is a risk factor to develop wet AMD in dry AMD cases.

Lesions, polyps and other abnormalities in the gastrointestinal (GI) tract have a different composition compared to the normal mucose. The investigators plan to gather spectroscopic information from these features. Characterizing their unique spectrums, may help to enhance the detection and identification of these objects during endoscopy.

The primary purpose of the Bariatric Outcomes Longitudinal Database (BOLD) study is to assess the mid- and long-term outcomes of bariatric surgeries and to analyze the relationship between these outcomes and 1) patient demographics and comorbidities, 2) clinical and surgical characteristics, and 3) pre-operative, peri-operative and post-operative care and treatment.

Purpose: Fetal anomalies scan at the time of Nuchal Translucency (NT) study.