View clinical trials related to Bariatric Surgery.
Filter by:The purpose of this study is to see how hormones that control blood sugar change in response to two different weight loss surgeries (gastric bypass and gastric banding). We believe that changes in a hormone called glucagon-like peptide-1 (GLP-1) may account for the greater improvement in blood sugar after certain types of surgeries. GLP-1 makes the pancreas release insulin, a hormone that lowers blood sugar. The study will consist of one screening visit and three study visits in which the glucose response will be measured after drinking a liquid meal: 1) Visit 1 (2-3 weeks before surgery); 2) Visit 2 (after 10% of body weight is lost); and 3) Visit 3 (5-10 days after Visit 2). Hormone levels will be measured during the three study visits. To see if the improvement in blood sugar after surgery is due to changes in GLP-1, we will block its effect on insulin release by giving either salt water or a medication that blocks the activity of GLP-1 during the two visits that take place after surgery (Visits 2 and 3).
The purpose of this study is to evaluate the use of preoperative incentive spirometry (IS) as an aid to improve postoperative lung function. The hypothesis is that application of a standardized protocol of preoperative respiratory care teaching and exercise will improve lung performance that will subsequently result in prevention of postoperative pulmonary complications and that increasing the duration of preoperative use better improves lung mechanics postoperatively. The investigators propose to compare a patient population that uses IS as currently prescribed in the routine course of care (only to be familiar with preoperatively, but use postoperatively) against a population that uses IS with a standardized regimen for at least 3 days prior to the operation in terms of preoperative IS volumes, intraoperative pulmonary mechanics, postoperative IS volumes, and incidence of postoperative pulmonary complications.
This study aims to determine the difference, if any, in the pharmacokinetics of duloxetine between patients who are nine to fifteen months post Roux-en-Y Bariatric Surgery and control subjects matched for body mass index (BMI), age and gender.
The objective of this study is to assess changes bone mineral density and bone metabolism after laparoscopic Roux-en-Y gastric bypass surgery. The investigators hypothesize that weight loss after laparoscopic Roux-en-Y gastric bypass surgery will be associated with increased bone turnover, changes in bone metabolism, and loss of bone mass.
In the proposed study, the investigators will explore three specific aims. First, the investigators will examine cross-sectionally the association of obesity on sympathetic, parasympathetic, and sympathetic/ parasympathetic nerve fiber balance. In addition, the investigators will determine the relationship of the ANS and osteocalcin. Osteocalcin will be measured before and after a mixed meal tolerance test. In the second specific aim, the investigators will prospectively follow-up these individuals (n=30) following bariatric surgery. The effect of weight loss on measures of the ANS and osteocalcin will be examined 6 months following surgery with participants serving as their own control, pre- and post-surgical intervention. Thirdly, the investigators will address whether the effect of weight loss on the ANS and osteocalcin differ between those who had a history of diabetes at baseline versus those with no history of diabetes.
The study aims to investigate the long term results of a randomized clinical single-centre trial comparing two standard operative techniques in bariatric surgery; laparoscopic adjustable gastric banding and vertical banded gastroplasty.
Bariatric surgery can lead to improvement or even resolution of type 2 diabetes in about 80% of patients submitted to Roux-en-Y gastric bypass (RYGP). Otherwise, many patients experienced no resolution of their diabetes despite massive surgical-induced weight loss. There appears to be a variable response to surgery depending on surgical and patient factors. To explore potential factors affecting diabetes outcomes after RYGP, this study is proposed to make a description of effects of surgical procedures on incretin, insulin production and sensitivity and a comparison between patients with or without remission of Type 2 Diabetes.
Morbid obesity currently affects more than 11 million US adults and is strongly associated with type 2 diabetes, cancer, cardiovascular disease, and arthritis. Bariatric (weight loss) surgical procedures have been shown to significantly reduce body weight and improve the health and quality of life of morbidly obese adults, at least in the short term. However, bariatric surgery also presents substantial risks, including a 10% to 20% risk of serious complications and up to a 2% risk of death in the first 30 days after surgery. Thus, a morbidly obese patient's decision regarding bariatric surgery should be based on his or her evaluation of accurate information on the possible risks and benefits of the various treatment options. Anecdotal reports suggest that bariatric treatment decisions may be more heavily influenced by insurance coverage and reimbursement rates than patient preferences. The main objective of the current proposal is to examine the impact of a bariatric decision aid, Weight loss surgery: Is it right for you?, on decision quality in primary care and bariatric specialty practice settings. We propose a randomized controlled trial to assess the effect of this bariatric decision aid on bariatric-specific measures of patient knowledge, values and choice of weight management strategy. We will also investigate the effect of the decision aid on decisional conflict and decisional self-efficacy and examine medical, psychological, and behavioral factors as mediators and moderators of treatment choice. This information will help to elucidate the value of this decision aid in improving decision quality. The primary aims of this of this research are to: 1. Determine if the bariatric decision aid results in superior bariatric surgery decision quality than an NIH booklet on weight loss surgery ('usual care'). 2. Determine if the bariatric decision aid results in less decisional conflict and superior decisional self-efficacy than usual care. 3. Determine if there is a differential effect of the interventions on decision quality among treatment seekers and non-treatment seekers. 4. Investigate medical, psychological, and behavioral factors as mediators of treatment choice. The secondary aims of this study are to: 1. Understand the current weight control attitudes and practices among morbidly obese patients who are not actively seeking bariatric surgical treatment. 2. Assess the rates of bariatric surgery, health care costs, health care use and outcomes, and changes in BMI over time across the intervention groups, as well as across study subgroups, such as those who did and did not choose to have bariatric surgery. We hypothesize that the decision aid will result in greater knowledge and greater values concordance, less decisional conflict and superior decisional self-efficacy than the NIH booklet.
The purpose of the trial is to determine whether a preoperative lifestyle intervention (targeting diet, exercise, and preparation for surgery) will favorably impact obesity-related parameters prior to bariatric surgery and improve short-term postoperative outcomes.
Aim: To optimize the use of rocuronium (a neuromuscular blocking agent) in obese patients undergoing gastric bypass or gastric banding. Background: During general anaesthesia, a neuromuscular blocking agent is needed to allow surgery and airway management. Optimal dosing is important in order to avoid inadequately muscle relaxation, but also to avoid overdosage, which can result in prolonged anaesthesia and respiratory complications. Main hypothesis: Rocuronium dosed according to ideal body weight results in shorter duration of action compared to rocuronium dosed according to corrected body weight without prolonged onset time or compromised airway management or surgical demands for muscle relaxation.