Efficacy of First-Time Intragastric Balloon in Weight Loss: a Systematic Review and Meta-analysis of Randomized Controlled Trials.

BACKGROUND: The intragastric balloon (IGB) is an adjunctive treatment for obesity. This meta-analysis aimed to evaluate the efficacy and safety of IGB treatment by reviewing randomized controlled trials (RCTs). METHODS: A total of 20 RCTs involving 1195 patients were identified. Weight loss results before and after 3 months were analyzed separately. The weight loss results of patients with and without IGB treatment were compared. RESULTS: Our meta-analysis calculated the following significant effect sizes: 1.59 and 1.34 kg/m2 for overall and 3-month BMI loss, respectively; 14.25 and 11.16 % for overall and >3-month percentage of excess weight loss, respectively; 4.6 and 4.77 kg for overall and 3-month weight loss, respectively; and 2.81, 1.62, and 4.09 % for overall, 3-month, and >3-month percent of weight loss, respectively. A significant effect size was calculated that favored fluid-filled IGBs over air-filled IGBs. Flatulence (8.75 vs. 3.89 %, p = 0.0006), abdominal fullness (6.32 vs. 0.55 %, p = 0.001), abdominal pain (13.86 vs. 7.2 %, p = 0.0001), abdominal discomfort (4.37 vs. 0.55 %, p = 0.006), and gastric ulcer (12.5 vs. 1.2 %, p < 0.0001) were significantly more prevalent among IGB patients than among non-IGB control patients. No mortality was reported from IGB treatment. CONCLUSION: IGB treatment, in addition to lifestyle modification, is an effective short-term modality for weight loss. However, there is not sufficient evidence confirming its safety or long-term efficacy.

Bariatric manipulation of gastric arteries: A systematic review on the potential concept for treatment of obesity.

BACKGROUND: Gastric artery embolization (GAE) has recently received attention as a minimally invasive intervention in bariatric setting. AIMS: The current systematic review aimed to gather and categorizes the existing data in the literature regarding bariatric gastric artery manipulation. This will highlight the importance of this potential concept as a therapeutic modality. METHODS: A PubMed/Medline search was conducted to identify animal and human studies investigating the effect of gastric artery manipulation on weight, ghrelin, obesity, and tissue adiposity. RESULTS: A total of 9 studies including 6 animal experiments with 71 subjects and 3 human studies with a total of 25 patients were retrieved. Animal subjects underwent chemical embolization while particle embolization was only used in human subjects. Five animal studies and 1 human study reported decreased ghrelin concentration. Three animal experiments and 2 human studies showed a significant weight change following GAE. There was no report regarding a serious adverse event requiring surgical or interventional management. CONCLUSION: Currently, data regarding the potential role of gastric artery manipulation in decreasing the ghrelin and potential weight loss is scarce.

Roux-en-Y gastric bypass reversal: a systematic review.

BACKGROUND: Due to the large number of Roux-en-Y gastric bypass surgeries performed over the last decade, reversal of the bypass to normal anatomy has been increasingly reported. SETTING: University affiliated Teaching Hospital, United States. OBJECTIVES: The aim of this systematic review was to summarize the literature data regarding the indications, technical considerations, and outcomes of gastric bypass reversal. METHODS: PubMed/MEDLINE search was conducted for articles reporting reversal of gastric bypass to normal anatomy. Patients' demographic characteristics, primary reason for reversal, reversal technique, and postreversal events were retrieved and categorized from each eligible paper. RESULTS: Thirty-five articles encompassing a total of 100 patients were eligible. Malnutrition was the most common indication for reversal (12.3%), followed by severe dumping syndrome (9.4%), postprandial hypoglycemia (8.5%), and excessive weight loss (8.5%). Techniques for gastrogastrostomy were available in 42 patients, with the hand-sewn technique as the most common (67.4%) followed by the linear stapler (23.2%) and the end-to-end anastomosis stapler used in 3 patients (6.9%). The reversal technique was performed endoscopically and described in 3 studies (3 patients). Techniques for handling the Roux limb were described in 56 patients (56%); the limb was reconnected in 32 patients (57.2%) and resected in 24 patients (42.8%). Weight regain was the most prevalent postreversal event (28.8%), followed by severe gastroesophageal reflux diseases (10.2%) and persistent abdominal pain (6.8%). There was no reported mortality. CONCLUSION: Gastric bypass reversal is indicated for excessive weight loss, dumping syndrome, and postprandial hypoglycemia. The procedure is well tolerated and feasible when performed laparoscopically and has no reported mortality.