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Biomedical subjects

E E Mason

Publications and source records attributed to E E Mason.

At least 19 recordsLinked to original sources
PubMed1999

Ileal [correction of ilial] transposition and enteroglucagon/GLP-1 in obesity (and diabetic?) surgery.

BACKGROUND: This is a review of intestinal glucagon, which is released when undigested food is in the terminal ileum. METHODS AND RESULTS: In the early 1980s, Koopmans and Sclafani showed in fat rats that the transposition of a short segment of ileum to the duodenum would decrease weight just as effectively as intestinal bypass. Sarson and coworkers found elevated enteroglucagon after biliopancreatic diversion (BPD). Scopinaro has observed that patients with diabetes who undergo BPD are cured of diabetes and do not experience a recurrence. Näslund and associates showed recently a high level of plasma glucagon-like peptide (GLP-1) 20 years after jejunoileal bypass. GLP-1 has been shown to be an effective medication for treatment of type 2 diabetes mellitus (DM). It must be given parenterally. It has been used only in short, well-controlled studies. CONCLUSIONS: It appears from all that is now known about GLP-1 that ileal transposition would be an ideal operation for treatment of type 2 DM. Release of enteroglucagon from the ileum has probably contributed to weight control in bypass operations for obesity, but the effect has been obscured by the associated malabsorption. The release of GLP-1 after meals has probably been beneficial to patients treated with gastric bypass who had type 2 DM. This is a recommendation for well-planned studies of ileal transposition in the treatment of type 2 DM and obesity. Ileal transposition is not recommended for general use until such studies have shown safety, efficacy, and the requirements for patient selection.

Animals↗
PubMed1998

Vertical gastroplasty: evolution of vertical banded gastroplasty.

The objective of this paper is to summarize the goals, technical requirements, advantages, and potential risks of gastroplasty for treatment of severe obesity. Gastroplasty is preferred to more complex operations, as it preserves normal digestion and absorption and avoids complications that are peculiar to exclusion operations. The medical literature and a 30-year experience at the University of Iowa Hospitals and Clinics (UIHC) provides an overview of vertical banded gastroplasty (VBG) evolution. Preliminary 10-year results with the VBG technique currently used at UIHC are included. At UIHC the VBG is preferred to other gastroplasties because it provides weight control that extends for at least 10 years and the required objective, intraoperative quality control required for a low rate of reoperation. It is recommended that modifications of the operative technique not be attempted until a surgeon has had experience with the standardized operation--and then only under a carefully designed protocol. Realistic goals for surgery and criteria of success influence the choice of operation and the optimum, lifelong risk/benefit ratio. In conclusion, VBG is a safe, long-term effective operation for severe obesity with advantages over complex operations and more restrictive simple operations.

Gastroplasty↗
PubMed1998

Starvation injury after gastric reduction for obesity.

Gastric reduction operations are designed to control body weight by establishing a small, meal-size juxtaesophageal, gastric pouch that empties into the jejunum (gastric bypass) or the larger portion of the stomach (gastroplasty). If the outlet of the pouch is too small, a patient may be limited to ingesting clear liquids. Vomiting then occurs if heavier liquids or normal foods are taken. An occasional patient has difficulty eating properly and vomits even though the pouch volume and outlet are of optimum size. For a patient who reports vomiting, a distinction must be made between episodic improper eating and uncontrolled starvation. Three types of starvation injury are described: (1) sudden death from protein malnutrition; (2) refeeding syndrome; and (3) Wernicke-Korsakoff syndrome. The mechanisms of the development, manifestations, prevention, and treatment of these complications are explained. Surgeons who treat severe obesity should be aware of these complications and be prepared to manage patients who have uncontrolled vomiting so that such complications either do not develop or are recognized and treated as early as possible before serious and irreversible injury occurs.

Female↗
PubMed1998

Past, present, and future of obesity surgery.

BACKGROUND: At the meeting 1 year ago, Mary Lou Walen asked the author to provide a brief luncheon talk about the past, present, and future of obesity surgery for the Allied Health Sciences members who meet in conjunction with the annual meeting of the American Society for Bariatric Surgery. This led the author to examine the surgical treatment of severe obesity as it relates to our times and society. Edward O. Wilson has recommended that bariatric surgeons enlarge their view of the work they are engaged in, to include a more universal perspective. From this review, the following talk was presented.

Digestive System Surgical Procedures↗
PubMed1998

Informed consent for obesity surgery.

A patient cannot consent to an operation without being adequately informed. There are a number of different operations in use today for treatment of severe obesity. The variations are designed to (1) limit food intake and/or (2) create malabsorption. The surgeon has a duty, according to the law of informed consent, to provide all of the information necessary for a reasonable person to decide whether to consent to the operation recommended. Changes in anatomy, function and risk therefore need to be explained. When only limitation of intake is planned, as in vertical banded gastroplasty (VBG), the patient should know how large the pouch will be and how the outlet will be stabilized. When both intake restriction and malabsorption are planned, as in Roux-en-Y gastric bypass (RGB), or biliopancreatic diversion (BPD), the patient should know whether there will be a larger pouch (less restriction) and a short common channel (more malabsorption) as in BPD or a smaller pouch and less malabsorption. Patients should know that if they have an operation that uses maximum malabsorption to bring weight to a nearly normal level, the risk of malnutrition will be increased, which may require further hospitalization and possible operative treatment. When the duodenum is to be bypassed, the patient should know that this will impair iron and calcium absorption, and that access to this area for radiologic and endoscopic procedures may not be possible. Simple drawings can be used to explain what is planned and how the operation will determine body weight, side-effects, and risk.

Gastric Bypass↗
PubMed1997

A decade of change in obesity surgery. National Bariatric Surgery Registry (NBSR) Contributors.

BACKGROUND: The International (formerly National) Bariatric Surgery Registry began collecting data in January 1986. The aim of this study was to examine changes in the practice of surgical treatment of severe obesity that occurred during the decade of 1986 through 1995, as observed in the IBSR data. METHODS: All data submitted to the IBSR during the decade were transferred to the IBM mainframe computer for analysis. Characteristics of operative type populations were compared over time using analysis of variance (ANOVA) for age, body mass index (BMI), operative weight and Chi-square (chi2) test for gender. RESULTS: There has been a steady increase over the decade in mean patient weight. The operations used have changed from predominantly 'simple' operations to more frequent use of 'complex' operations. Within the categories of 'simple' and 'complex', an increase in the variety of operations occurred. As a group, patients with 'simple' operations have been heavier, more often male and public pay patients than those who have undergone 'complex' operations. One year weight loss was greater for Roux-en-Y gastric bypass (RGB) than vertical banded gastroplasty (VBG), but follow-up rates were too low to study the relative merits of the operations used. The reported incidence of operative mortality and serious complications (leak with peritonitis, abscess and pulmonary embolism) remained low. CONCLUSIONS: These observations and their implications can be summarized in three statements which relate to action for improved patient care in the beginning of the new century: (1) increasing weight of candidates for surgical treatment during this decade indicates the need for earlier use of operative treatment before irreversible complications of obesity can develop; (2) low risk of obesity surgery, decreasing postoperative hospital stay, and early weight control support the continued and increased use of surgical treatment; (3) continued widespread use of both 'simple' and 'complex' operations with increased modifications of standard RGB and VBG procedures emphasizes the need for standardized long-term data and analyses regarding both weight control and postoperative side-effects.

Adult↗
PubMed1995

Reversal of small intestinal bypass operations and concomitant vertical banded gastroplasty: long-term outcome.

BACKGROUND: Long-term complications of jejunoileal bypass (JIB) have been reported, prompting restoration of intestinal continuity and concomitant performance of vertical banded gastroplasty (VBG) for weight control. The aim of this study was to evaluate the presentation and reversal of JIB complications, late complications, mortality, and long-term weight control in patients who have undergone JIB reversal and concomitant VBG. STUDY DESIGN: From 1981 to 1994, 37 patients were treated for complications from JIB that included diarrhea (73 percent), arthritis (46 percent), malnutrition (22 percent), urolithiasis (19 percent), electrolyte disorders (19 percent), and lack of weight loss (8 percent). Four patients required preoperative parenteral nutrition to correct protein and electrolyte imbalances. Surgical management of all 37 patients included restoration of bowel continuity and VBG during the same operative procedure. RESULTS: Postoperative complications occurred in 11 patients, including prolonged ileus in seven patients, pancreatitis in three patients, and infectious complications in two. There were no deaths. Late morbidity included staple line dehiscence in four patients, incisional hernia in three patients, and reversal of the VBG in one. All patients with diarrhea, malnutrition, electrolyte disorders, and lack of weight loss had resolution of their symptoms, while urolithiasis and arthritis resolved in 86 and 53 percent of patients, respectively. In patients available for five-year follow-up evaluation, weight changes were small, shifting from a preoperative weight of 87 +/- 19 to 90 +/- 19 kg at five years (mean +/- SD). CONCLUSIONS: Restoration of intestinal continuity combined with VBG is a safe and effective operation that will reverse most of the long-term complications of JIB and provide stable weight control for up to five years.

Acid-Base Imbalance↗
PubMed1992

Depression and other mental disorders in the relatives of morbidly obese patients.

The authors systematically interviewed 88 bariatric clinic patients presenting for vertical banded gastroplasty. The typical subject was middle-aged, female and of low socioeconomic status as indicated by his or her method of payment. Morbidly obese subjects were more likely than a comparison group to have first-degree relatives with a history of depression, bipolar disorder, antisocial personality, and other psychiatric disorders. These data indicate that relatives of morbidly obese subjects are frequently emotionally disturbed. Reasons for the findings are discussed.

Adult↗
PubMed1992

Gastric surgery for morbid obesity.

Patients with 100 pounds of excess weight (BMI greater than 40) have sufficient risk of complications and impairment of function to warrant an operation. There is no operation that will bring all patients to a normal weight without risk. More complex operations may provide greater weight reduction, at least until compensatory changes occur that permit improved digestion and absorption of food. The more complicated the operation, the greater the risk of undesirable side effects. Vertical banded gastroplasty has evolved over the last 35 years as a simple, safe, and effective way to control excessive weight with a minimum risk. This simple operation will produce a normal weight in about 30% of patients and satisfactory weight control in 80% of patients, without need for revision surgery. Optimum results depend on intraoperative measurement of pouch volume and outlet reinforcement, education of patients in the care of their operation, and continual evaluation of the early and long-term effects of these operations.

Gastric Bypass↗