Active clinical trials for "Obesity, Morbid"

This is a long-term follow-up and interventional study in individuals who have been diagnosed with moderate to severe obesity with or without diabetes. The purpose of this study is to determine the effects of sleeve gastrectomy on weight and blood sugar control and underlying mechanisms by metabolomics, metagenomics, functional magnetic resonance imaging (fMRI) ,adipose tissue expression chip and etc.

Assessment of Gastric Bypass combined with Vertical Sleeve Gastrectomy as primary treatment for patients with severe clinical obesity. Average percentage of total weight loss and percentage excess weight loss will be computed at 6 months, one year and then annually. Comorbid conditions, quality of life measures, appetite and satiety measures and adverse events will be tracked.

It is a prospective randomized trial on 218 subjects, 109 for each arms. The purpose of this trial is to compare very low calorie diet and metabolic surgery induced weight loss and its maintenance.

Background: Morbid obesity is associated with decreased brain µ-opioid receptor availability, possibly resulting in higher food intake needed to gain pleasure from eating. This decrease seems to normalize already 6 months after bariatric surgery, but the longer-term effects have not been studied. Obesity and insulin resistance result in significantly increased brain insulin-stimulated glucose uptake, whereas in every other tissue glucose uptake is lower. One possible explanation to this could be central inflammation and activation of brain glial cells, which has been shown to occur in animal models of obesity. Obesity has also been shown to associate with increased risk of Alzheimer's disease and cognitive decline in several studies. Aims: The first objective of this study is to both study the effects of bariatric surgery as well as compare the effects of gastric bypass and sleeve gastrectomy on food-associated pleasure, extending the follow-up period to 2 years postoperatively. The second aim is to investigate the effect of morbid obesity and weight loss on brain inflammation and gliosis and its association with increased brain insulin-stimulated glucose uptake. Furthermore, association of obesity, insulin resistance, central inflammation and neurocognitive dysfunction are evaluated.

Background: Many of the beneficial metabolic effects of bariatric surgery have been attributed to altered peptide hormone profiles, especially involving pancreatic and gut peptides. Objectives: assess the effects of bariatric procedures (sleeve gastrectomy, minigastric bypass and sleeve gastrectomy with loop bipartition) on GIT hormones. Methods: Prospective randomized study which was carried out in the department of General Surgery, Minia University hospital during the period from February 2018 to February 2019. This study included 3 groups subjected to different operations; each group consisted of 50 patients.

To examine the feasibility of intermittent fasting (36h, twice a week, unlimited salt and calorie-free fluid consumption), over three months, on body weight and composition in complicated obesity in whom age and medical complexity exclude the possibility of bariatric surgery.

Hormonal changes after SG and OAGB involve alterations in the levels of many enteric hormones, among these hormones are ghrelin and glucagon-like peptide-1 (GLP-1). Ghrelin is an orexigenic hormone that stimulates food intake and has a documented role in the development of obesity. While ghrelin levels decrease significantly after SG as the fundus, which is the main source of that hormone, is completely removed, they tend to increase after OAGB GLP-1 plays an important role in glucose homeostasis via affecting food intake and satiety. It enhances insulin secretion, stimulates the proliferation and growth of pancreatic beta cells, inhibits food and water intake, and promotes satiety. Some studies reported that both OAGB and SG are followed by increased GLP-1 levels. We conducted this randomized study to compare SG and OAGB with regards to weight loss, comorbidity resolution, changes in ghrelin and GLP-1 hormones, and complications.

The major problem in the treatment of morbidly obese children is the long term maintenance of the reduced weight. Maintenance-focused interventions have not been studied enough in adolescents with morbid obesity, neither in regard to conservative methods of weight reduction, nor in regard to bariatric surgeries. This study will investigate the effectiveness of an integrative, multi-disciplinary inpatient program for promoting long-term weight maintenance in children with morbid obesity. The program will be studied in two perspectives: as a conservative treatment, as well as an 'envelope' for bariatric surgeries including a pre-operational preparation phase and a post-operational follow-up. The investigators hypothesize that program participants will maintain weight significantly better than the proportion known in the literature.

Banded Versus Conventional Laparoscopic Roux-en-Y Gastric Bypass (GABY). The aim of this novel study is to evaluate, if an additional restrictive silastic ring can avoid dilation of the gastro-entero anastomosis and adjacent small bowel with consecutive better postoperative weight loss and significantly improved long-term weight maintenance. The study will not investigate the GaBP-Ring as medical product but the effect of the GaBP-Ring on weight loss in comparison to gastric bypass alone.

This is an observational study of morbidly obese patients recovering from general anesthesia after weight-loss surgery. The investigators aim to assess ventilatory function and how this is influenced by the diagnosis of obstructive sleep apnea (OSA), baseline ventilatory status, as well as pharyngeal collapsibility of patients who are recovering from anesthesia and treated for pain with opioids. The investigators hypothesize that patients with OSA, chronic (baseline) hypoventilation and increased pharyngeal collapsibility, will be more vulnerable to opioid-induced ventilatory depression.