Prospective study of a laparoscopically placed, adjustable gastric band in the treatment of morbid obesity

Management of Laparoscopic Adjustable Gastric Band Erosion: A Case Report

Gastric banding was one of the first operations to gain popularity within the field of bariatric surgery. This case details one patient's presentation and subsequent management of gastric band erosion with the hope of guiding other physicians and supporting the decreased use of gastric banding. The patient, a 61-year-old Caucasian female, presented to the bariatric clinic complaining of a multiyear history of epigastric pain and acid reflux, which was refractory to treatment with proton pump inhibitors. She had a history of laparoscopic adjustable gastric band (LAGB) placement in 2007. She was initially successful in achieving weight loss and maintained regular band adjustments but was lost to follow-up and regained a body mass index (BMI) of 41.59 kg/m2. Evaluation with upper gastrointestinal (GI) endoscopy was recommended and performed. This revealed a LAGB in its entirety with tubing within the gastric fundus. Removal with dual endoscopy and abdominal laparoscopy was recommended and scheduled. During attempts to remove the band using an endoscopic snare, significant difficulty was encountered. Ultimately, an endoscopic rat-tooth grasper was used to lyse the band and tubing into four sections for complete removal. The subcutaneous port of the band was successfully removed laparoscopically, and the patient was discharged from the operating room. She reported limited pain in the postoperative suite but was lost to follow-up regarding long-term symptom relief. This report describes the presentation and management of one patient's experience with a known complication of LAGB-band erosion. This complication necessitated two additional procedures with anesthesia and placed the patient at increased risk for esophageal perforation, complications related to sedation, and the development of abdominal adhesions. Her case aims to support the decreasing prevalence of LAGBs within bariatric surgery and hopes to guide other physicians challenged with the management of similar cases.

Laparoscopic adjustable gastric banding, the past, the present and the future

The laparoscopic implantation of an adjustable gastric banding (LAGB) was first described in 1993. Thereafter, the LAGB underwent to a lot of modifications, revision and refinements to become as it is currently defined. This procedure quickly became one of the most common bariatric surgical operations in the world in the first decade of the 2000s but, over the last few years, it has turned into the fourth more common procedure. A series of more or less clear reasons, led to this decrease of LAGB. The knowledge of the history of the LAGB, of its evolution over the years and its limitations can be the key-point to recognize the reasons that are leading to its decline. The adjustability and the absolute reversibility characteristic of LAGB, make this surgical procedure a “bridge treatment” to allow the specific goal of eradicating obesity.

Severe Obesity: A Growing Health Concern A.S.P.E.N. Should Not Ignore

The definition of malnutrition in the published standards of the American Society of Parenteral and Enteral Nutrition (A.S.P.E.N.) is any derangement in the normal nutrition status and includes overnutrition, commonly referred to as obesity. The incidence of obesity is increasing and reaching epidemic proportions in the United States and even worldwide. This has significant financial impact as our society spends billions of dollars on fad diets, commercial weight-loss programs, nutrition and dietary supplements, prescription and over-the-counter medications, and health clubs. Another approximately dollars 100 billion are spent to treat the medical consequences of obesity. Currently, for those patients with intractable morbid obesity, defined as having a body mass index >40 kg/m2, surgery offers the only option for achieving meaningful and sustainable weight loss. The resultant weight loss dramatically improves health and decreases the cost of health care for these patients. Years of refinement in technology and the introduction of safer and less invasive procedures have dramatically reduced the short-term morbidities and long-term metabolic consequences of these procedures. This address will review the field of weight loss (bariatric) surgery and will offer a compelling request for A.S.P.E.N. to include obesity in its fabric.

Laparoscopic Treatment of a Large Gastric Pouch Following Gastric Band Slippage

INTRODUCTION

Gastric band slippage with formation of a gastric pouch is a frequent complication after gastric banding. There is no consensus on the treatment of this condition, which differs within and between centers. Here, we describe our treatment of a large gastric pouch after gastric band slippage. Despite removal of the band, the pouch caused oral feeding intolerance.

METHODS

The video shows our treatment of large gastric pouch following gastric banding and surgical revision. A 45-year-old woman with history of gastric banding was referred to our center for persistent oral feeding intolerance following gastric band removal.

RESULTS

We found that a large gastric pouch was responsible for extrinsic compression and thus required revisional surgery after optimization of the patient's nutritional status. Video endoscopy revealed a large gastric pouch, which was responsible for oral feeding intolerance. Intra-operative exploration then revealed major adhesions, which had probably caused the pouch to form. During surgery that was somewhat analogous to sleeve gastrectomy, we removed the adhesions and resected the gastric pouch. The operating time was 70 min. An uneventful postoperative course enabled rapid discharge (on postoperative day 2).

CONCLUSION

The formation of a large gastric pouch is a rare complication of chronic gastric band slippage. Following nutritional optimization, surgery is required.

Recent advances in the modification of taste and food preferences following bariatric surgery

There is a large body of evidence indicating that bariatric surgery provides durable weight loss and health benefits to patients who are obese and have comorbidities such as type 2 diabetes (T2D). However, there are still many questions related to mechanisms of metabolic improvement, predictors of success/failure, and long term consequences, which need to be answered. More recently, there has been a particular interest in the modulation of taste and food preferences that occurs after bariatric surgery and how this affects weight loss in different individuals. Animal models as well as human studies have shed some light on the role of taste in changing food preferences and how these changes may affect weight loss after surgery. The goal of this review is to discuss the physiological and behavioral consequences of bariatric surgery as a treatment for obesity and T2D, with particular emphasis on recent studies describing bariatric surgery-induced modifications in taste perception and food preferences.

Concurrent Large Para-oesophageal Hiatal Hernia Repair and Laparoscopic Adjustable Gastric Banding: Results from 5-year Follow Up

OBJECTIVE

The objective of the study is to identify the efficacy and safety of combining laparoscopic adjustable gastric banding with repair of large para-oesophageal hernias.

BACKGROUND

Para-oesophageal hernias are more common in the obese with higher recurrence rates following repair. The effect and safety of combining para-oesophageal hernia repair with laparoscopic adjustable gastric banding is unknown.

METHODS

One-hundred fourteen consecutive patients undergoing primary laparoscopic adjustable gastric banding with concurrent repair of a large para-oesophageal hernia were prospectively identified and matched to a control group undergoing primary laparoscopic adjustable gastric banding only. Weight loss and complication data were retrieved from a prospectively maintained database, and a standardised bariatric outcome questionnaire was used to assess post-operative symptoms, satisfaction with surgery and satiety scores.

RESULTS

At a mean follow up of 4.9 ± 2.1 years, total weight loss was 16.4 ± 9.9% in the hernia repair group and 17.6 ± 12.6% in the control group (p = 0.949), with 17 vs. 11% loss to follow up rates (p = 0.246). No statistically significant difference in revisional surgery rate and symptomatic recurrence of hiatal hernia was documented in four patients in the hernia repair group (3.5%). No statistically significant difference in mean reflux (9.9 vs. 10.3, p = 0.821), dysphagia (20.7 vs. 20.1, p = 0.630) or satiety scores was identified.

CONCLUSIONS

Concurrent repair of large para-oesophageal hiatal hernia and laparoscopic adjustable gastric banding placement is safe and effective both in terms of symptom control and weight loss over the intermediate term. In obese patients with large hiatal hernias, consideration should be given to combining repair of the hernia with a bariatric procedure.

Endoscopic removal of partially migrated intragastric bands following surgical gastroplasty: a prospective case series

BACKGROUND

The intragastric migration of a surgically placed adjustable gastric band is believed to occur slowly, over months to years. Band removal procedures necessitate surgical laparotomy, thus increasing the risk of complications.

METHODS

The endoscopic technique for band removal described in this case-series provides a minimally invasive approach.

RESULTS

Fifteen patients referred for endoscopic removal of a partially migrated intragastric band. The partially migrated intragastric bands were all successfully removed in a mean of 1.1 endoscopic sessions. No patient required subsequent surgical intervention, and there were no immediate or delayed adverse events including no infections, bleeding, or perforations.

CONCLUSIONS

Endoscopic removal of partially migrated intragastric bands appears feasible, effective, safe, and is a minimally invasive alternative to repeat surgery.

Changing trends in bariatric surgery

BACKGROUND AND AIMS

Bariatric surgery is considered the only long-lasting treatment for morbid obesity. Techniques and procedures have changed dramatically. We report on some of the major changes in the field.

MATERIALS AND METHODS

We reviewed some of the major changes in trends in bariatric surgery based on some landmark paper published in the literature.

RESULTS

We identified three major phases in the evolution of bariatric surgery. The pioneer phase was mostly characterized by discovery of weight loss procedures serendipitously from procedures done for other purposes. The second phase can be identified with the advent of laparoscopic techniques. This is considered the phase of greatest expansion of bariatric surgery. The metabolic phase derives from the improved understanding of the mechanisms of actions of the bariatric operations at the hormonal and molecular level.

CONCLUSIONS

Bariatric surgery has changed significantly over the years. The safety of the laparoscopic approach, along with the better understanding of the metabolic changes obtained postoperatively, has led to a more individualized approach and also an attempt to expand the indications for these procedures.

Imaging of bariatric surgery: normal anatomy and postoperative complications

Obesity is a disease that has reached epidemic proportions in the United States and around the world. During the past 2 decades, bariatric surgery has become an increasingly popular form of treatment for morbid obesity. The most common bariatric procedures performed include laparoscopic Roux-en-Y gastric bypass, laparoscopic adjustable gastric banding, and laparoscopic sleeve gastrectomy. Fluoroscopic upper gastrointestinal examinations and abdominal computed tomography (CT) are the major imaging tests used to evaluate patients after these various forms of bariatric surgery. The purpose of this article is to present the surgical anatomy and normal imaging findings and postoperative complications for these bariatric procedures at fluoroscopic examinations and CT. Complications after Roux-en-Y gastric bypass include anastomotic leaks and strictures, marginal ulcers, jejunal ischemia, small bowel obstruction, internal hernias, intussusception, and recurrent weight gain. Complications after laparoscopic adjustable gastric banding include stomal stenosis, malpositioned bands, pouch dilation, band slippage, perforation, gastric volvulus, intraluminal band erosion, and port- and band-related problems. Finally, complications after sleeve gastrectomy include postoperative leaks and strictures, gastric dilation, and gastroesophageal reflux. The imaging features of these various complications of bariatric surgery are discussed and illustrated.

Laparoscopic adjustable gastric banding in adolescents

Gastric band placement developed as a means of limiting the amount of solid food that enters the stomach, relying on the principle of reducing caloric intake by reducing food volume. By making it difficult for a patient to swallow a large bite of food, one ideally could learn to change eating behavior to take smaller bites and eat more slowly in order to avoid the unpleasant sensation of food backing up at the level of the restriction. Limiting intake should result in weight loss. This article reviews the history of gastric band surgery, the operation and follow-up care, complications associated with gastric banding, and results to date.

Citation classics: top 50 cited articles in bariatric and metabolic surgery

BACKGROUND

The number of times an article has been cited reflects its influence in a specific field. The aim of this study was to identify and characterize the most highly cited articles published on bariatric and metabolic surgery.

METHODS

The 50 most frequently cited articles in bariatric and metabolic surgery were identified from the Scopus database in December 2013.

RESULTS

The median number of citations was 383.5 (range 275-2482). Most of the articles were published from 2000-2012 (n = 35), followed by 1990-1999 (n = 12), then before 1990 (n = 3). These citation classics came from 8 countries, with the majority originating from the United States (n = 34), followed by Sweden (n = 4) and Australia (n = 4). The 50 articles were published in 20 journals, led by New England Journal of Medicine (n = 9) and Annals of Surgery (n = 9). Only 10 of the articles were published in obesity-specific journals. The level of evidence of the 49 clinical publications and 1 animal study consisted of level I (n = 5), II (n = 11), III (n = 9), IV (n = 19), and V (n = 6). Meta-analyses were 16% of the total citations. Metabolic (n = 12) and survival (n = 6) effects of surgery were among the most common fields of study.

CONCLUSION

Extending from the early 1950s through the voluminous growth period of the early 2000s, the field of bariatric and metabolic surgery led to the emergence of many top-cited scientific articles. These articles have provided the scientific basis for the only currently effective treatment for severe obesity. Articles published in high-impact journals, innovative observational studies, meta-analyses, survival analyses, and research on postoperative metabolic changes are most likely to be cited in the field of bariatric surgery.

Long-term outcomes after bariatric surgery: fifteen-year follow-up of adjustable gastric banding and a systematic review of the bariatric surgical literature

OBJECTIVE

To describe the long-term outcomes after laparoscopic adjustable gastric banding (LAGB) and compare these with the published literature on bariatric surgery.

BACKGROUND

Because obesity is a chronic disease, any proposed obesity treatment should be expected to demonstrate long-term durability to be considered effective. Yet for bariatric surgery, few long-term weight loss data are available. We report our 15-year follow-up data after LAGB and provide a systematic review of the peer-reviewed literature for weight loss at 10 years or more after bariatric surgical procedures.

METHODS

We performed a prospective longitudinal cohort study of LAGB patients using an electronic database system (LapBase) to track progress, measure weight changes, and document revisional procedures. The evolution of the LAGB procedure was recognized, and revisional rates for 3 separate periods between September 1994 and December 2011 were described. In addition, we performed a systematic review of the peer-reviewed published literature collecting all reports that included weight loss data at or beyond 10 years.

RESULTS

A total of 3227 patients, with a mean age of 47 years and a mean body mass index of 43.8 kg/m, were treated by laparoscopic adjustable gastric band placement between September 1994 and December 2011. Seven hundred fourteen patients had completed at least 10 years of follow-up. Follow-up was intact in 81% of patients overall and 78% of those beyond 10 years. There was no perioperative mortality for the primary placement or for any revisional procedures. There was 47.1% of excess weight loss (% EWL) at 15 years [n = 54; 95% confidence interval (CI) = 8.3] and 62% EWL at 16 years (n = 14; 95% CI = 13.6). There was a mean of 47.0% EWL (n = 714; 95% CI = 1.3) for all patients who were at or beyond 10 years follow-up. Revisional procedures were performed for proximal enlargement (26%), erosion (3.4%), and port and tubing problems (21%). The band was explanted in 5.6%. The need for revision decreased as the technique evolved, with 40% revision rate for proximal gastric enlargements in the first 10 years, reducing to 6.4% in the past 5 years. The revision group showed a similar weight loss to the overall group beyond 10 years. The systematic review of all bariatric procedures with 10 or more years of follow-up showed greater than 50% EWL for all current procedures. The weighted mean at maximum follow-up for LAGB was 54.2% EWL and for Roux-en-Y gastric bypass was 54.0% EWL.

CONCLUSIONS

The LAGB study from 1 center demonstrates a durable weight loss with 47% EWL maintained to 15 years. This weight loss occurred regardless of whether any revisional procedures were needed. A systematic review shows substantial and similar long-term weight losses for LAGB and other bariatric procedures.

Laparoscopic surgery compared with open surgery decreases surgical site infection in obese patients: a systematic review and meta-analysis

OBJECTIVE

To compare surgical site infections rate in obese patients after laparoscopic surgery with open general abdominal surgery.

BACKGROUND

In mixed surgical populations, surgical site infections are fewer in laparoscopic surgery than in open surgery. It is not clear if this is also the case for obese patients, who have a higher risk of surgical site infections than nonobese patients.

METHODS

MEDLINE, Embase, and The Cochrane library (CENTRAL) were searched systematically for studies on laparoscopic surgery compared with open abdominal surgery. Randomized controlled trials (RCTs) and observational studies reporting surgical site infection in groups of obese patients (body mass index ≥ 30) were included. Separate meta-analyses with a fixed effects model for RCTs and a random effects model for observational studies were performed. Methodological quality of the included studies was assessed according to the Cochrane method and the Newcastle-Ottawa Scale.

RESULTS

Eight RCTs and 36 observational studies on bariatric and nonbariatric surgery were identified. Meta-analyses of RCTs and observational studies showed a significantly lower surgical site infection rate after laparoscopic surgery (OR = 0.19; 95% CI [0.08-0.45]; P = 0.0002 and OR = 0.33; 95% CI [0.26-0.42]; P = 0.00001). Sensitivity analyses to assess the impact of selection and detection bias confirmed the significant estimates with acceptable heterogeneity. No publication bias was present for the observational studies.

CONCLUSIONS

Laparoscopic surgery in obese patients reduces surgical site infection rate by 70%-80% compared with open surgery across general abdominal surgical procedures. Future efforts should be focused on further development of laparoscopic surgery for the growing obese population.

Best Practice Guidelines in Pediatric/Adolescent Weight Loss Surgery

OBJECTIVE

To establish evidence-based guidelines for best practices in pediatric/adolescent weight loss surgery (WLS).

RESEARCH METHODS AND PROCEDURES

We carried out a systematic search of English-language literature in MEDLINE on WLS performed on children and adolescents. Key words were used to narrow the field for a selective review of abstracts. Data were extracted, and evidence categories were assigned according to a grading system based on established evidence-based models. Eight pertinent case series, published between 1980 and 2004, were identified and reviewed. These data were supplemented with expert opinions and literature on WLS in adults.

RESULTS

Recommendations focused on patient safety, reduction of medical errors, systems improvements, credentialing, and future research. We developed evidence-based criteria for eligibility, assessment, treatment, and follow-up; recommended surgical procedures based on the best available evidence; and established minimum guideline requirements for data collection.

DISCUSSION

Lack of adequate data and gaps in knowledge were cited as important reasons for caution. Physiological status, comprehensive screening of patients and their families, and required education and counseling were identified as key factors in assessing eligibility for surgery. Data collection and peer review were also identified as important issues in the delivery of best practice care.

Revision of laparoscopic adjustable gastric banding: success or failure?

BACKGROUND

Laparoscopic adjustable gastric banding (LAGB) is a safe and frequently performed bariatric procedure. Unfortunately, re-operations are often necessary. Reports on the success of revisional procedures are scarce and show variable results, either supporting or declining the idea of revising LAGB. This study describes a large cohort of re-operations after failed LAGB to determine the success of revision.

METHODS

By use of a prospective cohort, all LAGB revisions performed between 1996 and 2008 were identified. From 301 primary LAGB procedures in our centre, 43 patients (14.3%) required a band revision. In addition, 51 patients were referred from other centres. Our analysis included in total 94 patients with a mean follow-up period of 38 months after revision.

RESULTS

Revision was mainly necessary due to anterior slippage (46%) and symmetrical pouch dilatation (36%), which could be resolved by replacing (70%) or refixating the band (27%). Weight loss significantly increased after revision (excess BMI loss (EBMIL), 37.2 ± 36.3% versus 47.5 ± 30.4%, P < 0.05). After revision, 23 patients (24%) needed a second re-operation. Patients converted to other procedures (16%) during the second re-operation showed larger weight loss than the revised group (EBMIL, 64.3 ± 28.1% versus 44.3 ± 28.7%, P < 0.05).

CONCLUSIONS

We report on a large cohort of LAGB revisions with 38 months of follow-up. Revision of failed LAGB by either refixation or replacement of the band is successful and further increases weight loss.

A 5-year experience with laparoscopic adjustable gastric banding--focus on outcomes, complications, and their management

BACKGROUND

Laparoscopic adjustable gastric banding (LAGB) remains the most popular surgical modality for obesity management in Europe. The aim of this publication is to present a 5-year experience in obesity treatment with LAGB operation with the assessment of outcomes, frequency of complications, and their management. Management of the band-related complications is crucial for continuous obesity treatments, despite the fact of initial failure, allowing further excess weight loss in patients with morbid obesity.

METHODS

One hundred sixty patients underwent the LAGB procedure with standard pars flaccida technique during the years 2005-2009. A retrospective analysis of the data was performed; chi-squared test and Student's t test at the level of significance of p < 0.05 were used. Information on reoperations was gathered from hospital case notes.

RESULTS

In the presented group, the mean body mass index (BMI) was 48.13 kg/m(2) (33.46-83.04 kg/m(2); standard deviation [SD] ±8.45). Of the patients, 36.2% had super morbid obesity with BMI >50 kg/m(2). The mean observation period reached 549 days (31-2,026 days; SD ±390.1), with the mean number of control visits of 4.2 (1-12). The mean percentage of excess weight loss during the observation period was 34% (from -9.9% to 85.1%; SD ±20.6), with the mean body mass reduction of 24.4 kg. Complications appeared in 30 patients (20.1%). Twenty-four patients (16.1%) required reoperation. There were no mortalities recorded.

CONCLUSIONS

The mean operative time of 59 min was relatively short. Morbidity and mortality rates were comparable to many published series. Failure or complications of LAGB did not stop the obesity treatment. Most of the band-related complications occurred late and could be provided for laparoscopically.

Does pregnancy increase the need for revisional surgery after laparoscopic adjustable gastric banding?

BACKGROUND

Over 80% of laparoscopic adjustable gastric banding (LAGB) patients are women, and approximately half of these are of reproductive age; therefore, pregnancy post-LAGB is common. It is not known if pregnancy increases the need for revisional procedures. We compare the incidence of revisions in two matched cohorts of LAGB patients, with or without subsequent pregnancy.

METHODS

From September 1994 to May 2009, 5,467 patients underwent LAGB at the Centre for Bariatric Surgery, Australia. Women with births post-LAGB were matched to controls, with a "matched follow-up date" calculated equivalent to pregnancy. Rates of primary and overall revisions for band-related (erosions and proximal pouch dilatations) and port/tubing complications were compared for cases and controls at 2 and 3 years post-pregnancy.

RESULTS

One hundred eighty-nine women had ≥1 pregnancies post-LAGB, including 137 with follow-up at 2 years and 104 at 3 years post-pregnancy. There was no significant difference in band or port/tubing revisions between groups at either time point: 16.8% vs 10.5% (p = 0.13) and 23.9% vs 14.6% (p = 0.09) for primary band revisions, and 5.8% vs 5.3% (p = 0.84) and 10.5% vs 6.6% (p = 0.35) for primary port/tubing revisions at 2 and 3 years, respectively. Percentage excess weight loss (%EWL) 3 years post-pregnancy was similar (47.9% vs 47.7%). Pregnancy LAGB management was not found to affect revisions; however, less time between LAGB and pregnancy was associated with a higher rate of primary band revisions (p = 0.03).

CONCLUSION

These data suggest that pregnancy post-LAGB does not affect revision rate or %EWL; however, a shorter time between LAGB operation and pregnancy may predispose to band revisions.

Early experience with diagnosis and management of eroded gastric bands

PURPOSE

Band erosion is a well-known complication of laparoscopic adjustable gastric band placement. We gained experience with laparoscopic removal of an eroded gastric band.

METHODS

We retrospectively reviewed the operative log of our obesity surgery unit to identify all operations performed for band erosion from March 2009 to May 2011.

RESULTS

During the study period, a total of six of 96 patients (6.3%), five females and one male, were diagnosed with band erosion and underwent surgical removal of the band system. The median time interval from the initial gastric band placement to the diagnosis of band erosion was 8.5 months (range, 7 to 22 months), with most band erosion occurring within the first year (5/6, 83%). The median body mass index at band removal was 28.4 kg/m(2). Upper abdominal pain was the most common symptom (5/6, 83%), and other signs and symptoms were port site infection (3/6, 50%) and loss of restriction and weight regain (1/6, 17%). All eroded bands were removed using laparoscopy. Further complications after laparoscopic removal of the band system were observed in three cases. One patient showed multiple intra-abdominal abscesses requiring insertion of a pigtail catheter for drainage. The other two patients experienced sepsis with localized peritonitis, eventually requiring laparoscopic washout and drainage.

CONCLUSION

Gastric band erosion requires the removal of the gastric band. Laparoscopic removal is technically achievable in the majority of patients with eroded gastric band. The method can be challenging, has potential postoperative complications (fistula, abscess), and should be attempted only by experienced surgeons.

The mechanism of weight loss with laparoscopic adjustable gastric banding: induction of satiety not restriction

Laparoscopic adjustable gastric banding (LAGB) has rapidly emerged as a popular bariatric procedure because of its safety, efficacy, durability and adjustability. Despite widespread use, there is limited understanding of how it induces weight loss. Previously, it has been classified as a restrictive procedure, physically limiting the patient to a small meal that subsequently slowly empties into the distal stomach. However, the tiny pouch of stomach created above the LAGB appears to be unable to accommodate even the smallest of meals. Therefore, the key mechanism has been hypothesized to be the induction of satiety via, as yet, undefined pathways. The critical question remains: what are the key physiological changes that lead to satiety and weight loss? In successful LAGB patients, a consistent intraluminal pressure at the level of the LAGB of 26.9 ± 19.8 mm Hg is observed. Studies using semi-solid swallows combined with intraluminal pressure recordings have demonstrated that semi-solid transit across the resistance of the LAGB is mediated by repeated esophageal peristaltic contractions (mean 4.5 ± 2.9) that produce episodic flow, interspersed by reflux events. Failed transit results in obstruction and regurgitation, whereas dilatation of the supraband stomach induces severe and intolerable reflux. Overall gastric emptying does not appear to be significantly altered following LAGB. Focused investigations have shown that the supraband stomach is empty of an ingested meal 1-2 min after intake ceases. Considerable progress has been made in understanding the mechanical physiological effects of the LAGB on esophageal and proximal gastric function. These have been correlated with patient outcomes and sensations. On the basis of recent data, it appears that the LAGB activates the peripheral satiety mechanism without physically restricting the meal size. Therefore, it should not be classified as a restrictive procedure. The precise mechanism of weight loss with the LAGB remains to be delineated.

Long-term results and complications following adjustable gastric banding

This study was performed to assess our long-term results with laparoscopic gastric banding in patients with an observation period of at least 9 years calculated from the date of operation. Between January 1996 and December 2000, a total of 276 patients (83% female) underwent laparoscopic gastric banding at our institution. Mean preoperative body mass index (BMI) was 44 +/- 6 kg/m(2). BMI after 1, 5, 7, 9, and 10 years was 33 +/- 6, 30 +/- 6, 31 +/- 6, 32 +/- 7, and 31 +/- 7 kg/m(2), respectively. Mean excess weight loss after 1 year was 57.1 +/- 23.0% and after 5, 7, 9, and 10 years 73.2 +/- 29.6%, 65.9 +/- 29.3%, 61.8 +/- 32.8%, and 64.0 +/- 32.1%, respectively. Median completeness of follow-up was 80%. Of the study population, 146 (52.9%) patients had at least one complication requiring reoperation. Presently, only 148 (53.6%) patients still have their original band, 49 (17.8%) had their original band replaced with a new one, and 79 (28.6%) had their band removed. Thirty-three patients had no second bariatric operation, a Roux-en-Y gastric bypass was done in 39 patients, and six patients underwent sleeve gastrectomy. Our long-term results are good with regard to weight loss in those patients who still have their band in situ. This is accompanied by a high complication rate and a 29% band loss rate.

Laparoscopic revision of gastric band surgery

AIM

To identify the outcome of laparoscopic revision of gastric band surgery with respect to percentage of excess weight lost (%EWL).

METHODS

Analysis of a prospective database was then performed and %EWL was plotted with respect to time from initial procedure and also time from revision procedure.

RESULTS

All revision operations were performed laparoscopically. There were no patient deaths, but two serious complications. Percentage excess weight loss after replacement of the band because of prosthetic failure or dysphagia was 57% at an average follow-up of 19 months. For repositioning of the band due to slippage, the %EWL was 72% at an average of 15 months follow-up for those who had the existing band repositioned, and 42% at an average of 23 months follow-up for those who had a new band repositioned.

CONCLUSION

Revision laparoscopic gastric band surgery is a safe option for patients, and results in good %EWL at an average follow-up period of 19 months.

Long-term results of laparoscopic adjustable gastric banding in patients lost to follow-up

BACKGROUND

The aim of the study was to evaluate the results of laparoscopic adjustable gastric banding (LAGB) in patients lost to follow-up.

METHODS

Patients lost to follow-up were identified from a consecutive cohort of 495 patients who underwent LAGB between November 1995 and September 2006. These patients were asked to return to follow-up and their actual weight was assessed.

RESULTS

Of 93 patients lost to follow-up, 73 were motivated to reattend. Of these, 60 per cent (44 patients) had lost less than 25 per cent of excess weight, compared with 16.3 per cent (P < 0.001), 27.0 per cent (P < 0.001) and 42 per cent (P = 0.026) of patients after 2, 4 and 8 years of regular follow-up.

CONCLUSION

Patients lost to follow-up are more likely to have poor weight loss, emphasizing the importance of follow-up after LAGB. Outcome after surgery for morbid obesity should include patients lost to follow-up as a measure of overall success.

Reducing band slippage in laparoscopic adjustable gastric banding: the mesh plication pars flaccida technique

BACKGROUND

Band slippage is a significant complication of laparoscopic adjustable gastric band (LAGB) surgery for the treatment of morbid obesity. This involves prolapse of part of the stomach, with varying degrees of gastric obstruction. The original perigastric technique (PGT) was associated with slippage rates of up to 25%. The pars flaccida technique (PFT) is the more commonly used technique today, reducing slippage rates to as low as 1.4%. We report a technique not previously described, the modified PFT with the use of mesh, and compare slippage rates between these three techniques for band placement.

METHODS

A prospectively entered, retrospective review of 1,446 consecutive patients undergoing LAGB by a single surgeon was undertaken. Patients were divided into five consecutive groups: PGT learning curve (PGTLC) (n = 68), PGT (n = 19), mesh PFT (MPFT) (n = 415), mesh plication PFT (MPPFT) (n = 131), and MPPFT with inadequate follow-up (n = 813). Patient characteristics, band slippage, and other complication rates were compared between groups.

RESULTS

The slippage rates for each group were: PGTLC (10%), PGT (5%), MPFT (0.8%), and MPPFT (0%). This demonstrated a statistically significant difference between the slippage rates for each group (p < 0.001). Combining the MPFT and MPPFT groups, there was a statistically significant difference in band slippage compared to the PGT group (p < 0.001).

CONCLUSION

While the MPFT is associated with low band slippage rates, the MPPFT results in further reductions in band slippage. The routine use of this modification to the MPFT is safe and may reduce operative morbidity. A randomized comparison of these techniques is warranted.

The activity of gastric ghrelin positive cells in obese patients treated surgically

Ghrelin is a 28 amino acid peptide hormone regulating food intake and stimulating releasement of growth hormone. It is produced in a distinct endocrine call known as X/A - like cells. The most abundant source of this very important factor in energy homeostasis is gastric fundus. Regulatory mechanisms of ghrelin synthesis and secretion in physiological and pathological states are not discovered completely. The aim of our study was evaluation of the activity of gastric X/A-like cells in obese patients before and after the most popular surgical bariatric procedures - Roux - Y Gastric Bypass (RYGB) and Laparoscopic Adjustable Gastric Banding (LAGB). Obese patients in number 18 took part in the study. LAGB was performed in 7 patients and RYGB in 11 patients. Peripheral blood was taken from each patient before operation and first day, seventh day, one month and three months after surgery. Ghrelin level was determined by RIA technique. The specimen of stomach was taken from circular stapler after gastrojejunostomy during RYGB and immunohistochemical study of gastric mucosa, using the EnVision method and specific monoclonal antybodies against ghrelin was performed. The intensity of ghrelin-immunoreactivity in X/A-like cells was analyzed using Olympus Cell D image analysis system. Efficiency of bariatric procedures was estimated by EWL- excess weight loss. We observed very strong immunohistochemical reactions of gastric X/A-like cells, accompanied by lower ghrelin plasma concentration, in comparison to the control group. LAGB procedure induced increase of ghrelin plasma level while RYGB procedure induced decrease of this hormone. The main finding of the present study is the hypoactivity of gastric X/A-like cells in obese patients in comparison to the control group.

Past, present, and future: Critical analysis of use of gastric bands in obese patients

Adjustable gastric banding (AGB) is quickly becoming the most popular bariatric operation performed in the United States and Canada. Patients are particularly fond of the simplicity of the tool, the relatively low morbidity of the surgery, the quick recovery, and overall results. The gastric band has evolved over its 35-year history into a very successful adjustable tool used to restrict food consumption and limit caloric intake. The percent of excessive weight loss after banding can range from 30%-60% and depends on the time out from surgery. Along with weight loss, there is good resolution of the co-morbid conditions that are associated with excess weight and improvements in quality of life demonstrated after banding. Nutrition and follow up are extremely important after banding to ensure good compliance and adequate weight loss. Failure to follow the postoperative diet, exercise regiment, or mechanical failure of the band can lead to failure to lose adequate weight. While there are particular early and late complications associated with this surgery, the safety profile of the AGB is very appealing when compared to other bariatric operations. As we continue to reduce the morbidity of the procedure, the simple adjustable band concept has a lot of potential to remain a primary technique of maintaining long term weight loss. In conclusion, AGB has and continues to play an important role in the treatment of morbid obesity. It offers reasonably good weight loss results with very little morbidity, and the future of the adjustable band is bright.

Effects of gastric band adjustments on intraluminal pressure

BACKGROUND

Understanding of the effects of adjustments to laparoscopic adjustable gastric band (LAGB) volume is limited. Changes in intraluminal pressure may be important and explain patients reporting a tighter LAGB after saline is removed and an identical volume replaced.

METHODS

Using high-resolution manometry, changes in the basal intraluminal pressure at the level of the LAGB in response to sequential, small alterations in LAGB volume were recorded. All fluid was removed from the LAGB and replaced, pressures and motility were reassessed.

RESULTS

Sixteen patients (four males, age 45.4+/-13.2 years) participated. A linear increase (r2=0.87+/-0.12) in intraluminal pressure was observed after a threshold volume was reached. The threshold volume varied considerably (1.0 to 5.8 ml). The gradient of the linear increase was 21.2+/- 8.7 mmHg/ml. The mean basal intraluminal pressure at the level of the LAGB was initially 19.1+/-8.9 mmHg and increased to 37.0+/-20.4 mmHg (p=0.001) after removing and replacing the same volume of saline. There was an increase in distal esophageal peristaltic pressure (123.5+/- 34.7 vs. 157.4+/-52.6 mmHg, p=0.003) and a decrease in the proportion of normal swallows (0.85+/-0.22 vs. 0.53+/- 0.47, p=0.02). Nine patients also developed adverse symptoms.

CONCLUSIONS

Intraluminal pressure at the level of the LAGB is an objective measure of the restriction produced by LAGBs. The addition of fluid to the LAGB results in a linear increase in intraluminal pressure once a threshold volume is reached. The removal and replacement of the same volume of saline from the LAGB may temporarily increase intraluminal pressure.

Bariatric surgery for morbid obesity: pre-operative assessment, surgical techniques and post-operative monitoring

This observational clinical analysis included 246 patients who underwent surgery for adjustable gastric banding (AGB), laparoscopic sleeve gastrectomy (LSG), or gastric bypass (GBP) between May 2005 and December 2008. The most frequent surgical procedure was for AGB (73.2% of patients). A thorough psychological evaluation of the patients was carried out, and pre- and post-operative psychological and dietary support was offered. A total of 111/120 (92.5%) AGB patients, 21/30 (70.0%) LSG patients and 8/36 (22.2%) GBP patients have been monitored for at least 1 year, and their mean weight losses (percentage excess weight loss) were 24.7 kg (52.4%), 46.0 kg (57.9%) and 40.5 kg (77.9%), respectively. The AGB procedure was associated with the fewest complications but is not appropriate for all patients. Good pre-operative psychological evaluation has been shown to be necessary for successful outcomes and, in the super-obese, we prefer to use LSG. Surgeons should learn the skills needed to perform laparoscopic Roux-en-Y GBP as it is likely to become the standard-of-care for the surgical treatment of obesity. The best outcomes following bariatric surgery are achieved with a multidisciplinary approach, including participation in a support group guided by a psychologist.

Two-staged surgery for metastatic liver tumor in morbidly obese individual-left hemihepatectomy following placement of laparoscopic adjustable gastric band

A 47-year-old male with a body mass index (BMI) 37.12 kg/m(2) was diagnosed with an ill-demarcated tumor within IVB segment of left lobe of the liver. Sixteen months earlier, he underwent laparoscopic gastric banding for morbid obesity (BMI 51 kg/m(2)). One year after bariatric procedure, he was diagnosed with rectal adenocarcinoma. Following abdominoperineal resection of rectum with total mesorectal excision and 2 months course of adjuvant FOLFOX chemotherapy, he was scheduled for liver resection. Left hemihepatectomy was performed with no major complications; wound discharge was successfully treated in outpatient clinic. Twelve months following surgery, he remains disease free with no evidence of local recurrence, metachronic primary tumor, or distant metastases. This is first to our knowledge report providing data on the outcome of left hemihepatectomy performed in postbariatric patient. The role of bariatric surgery and utilization of the time necessary for neoadjuvant chemotherapy to reduce the excessive body mass and the degree of liver steatosis is discussed.

Outcomes, satiety, and adverse upper gastrointestinal symptoms following laparoscopic adjustable gastric banding

BACKGROUND

Follow-up is critical to the success of laparoscopic adjustable gastric banding (LAGB). Few data guide this and expected norms of satiety, adverse symptoms, and outcomes have not been defined.

METHODS

Consecutive patients, who underwent LAGB, were evaluated using a newly developed instrument that assessed satiety, adverse upper gastrointestinal (dysphagia, reflux, and epigastric pain), and outcomes (overall satisfaction, weight loss, and quality of life (SF-36)).

RESULTS

Three hundred twenty-three of 408 patients responded (80%; mean age 44.4 ± 11.8 years, 56 males). Excess weight loss was 52%. Satiety was greater at breakfast compared to lunch (5.3 ± 1.9 vs. 4.1 ± 1.7, p < 0.005) or dinner (3.8 ± 1.8, p < 0.005). The satisfaction score was 8.3 ± 2.1 out of 10, and 91% would have the surgery again. Quality of life was less than community norms, except in physical functioning (83.4 ± 20.5 vs. 84.7 ± 22.0, p = 0.25) and bodily pain (78.4 ± 15.2 vs. 75.9 ± 25.3, p = 0.004). Inability to consume certain foods was cited as the biggest problem by 66% of respondents. The dysphagia score was 19.9 ± 8.7; softer foods were tolerated, although difficulty was noted with firmer foods. The reflux score was 8.7 ± 9.8 and regurgitation occurred a mean of once per week. Weight loss and the mental component score were the only predictors of overall satisfaction (r² = 0.46, p = 0.01).

CONCLUSIONS

Patients are highly satisfied with the outcome of LAGB and achieve substantial weight after 3 years. Expected ranges of satiety, adverse symptoms, and outcomes have been defined. The most troublesome symptom is the inability to consume certain foods. Weight loss predicted overall satisfaction, regardless of adverse symptoms.

Outcomes of laparoscopic adjustable gastric banding in patients with low body mass index

BACKGROUND

The current National Institutes of Health guidelines have recommended bariatric surgery for patients with a body mass index (BMI) >40 kg/m(2) or BMI >35 kg/m(2) with significant co-morbidities. However, some preliminary studies have shown that patients with a BMI that does not meet these criteria could also experience similar weight loss and the benefits associated with it.

METHODS

An institutional review board-approved protocol was obtained to study the effectiveness of laparoscopic adjustable gastric banding in patients with a low BMI. A total of 66 patients with a BMI of 30-35 kg/m(2) and co-morbidities (n = 22) or a BMI of 35-40 kg/m(2) without co-morbidities (n = 44) underwent laparoscopic adjustable gastric banding. These patients were compared with 438 standard patients who had undergone laparoscopic adjustable gastric banding who met the National Institutes of Health criteria for bariatric surgery. The excess weight loss at 3, 6, 12, and 18 months and the status of their co-morbidities were compared between the 2 groups.

RESULTS

The average BMI for the study group was 36.1 +/- 2.6 kg/m(2) compared with 46.0 +/- 7.3 kg/m(2) for the control group. Both groups had significant co-morbidities, including hypertension, diabetes, hyperlipidemia, arthritis, gastroesophageal reflux disease, stress incontinence, and obstructive sleep apnea. The mean percentage of excess weight loss was 20.3% +/- 9.0%, 28.5% +/- 14.0%, 44.7% +/- 19.3%, and 42.2% +/- 33.7% at 3, 6, 12, and 18 months, respectively. This was not significantly different from the excess weight loss in the control group, except for at 12 months. Both groups showed similar improvement of most co-morbidities.

CONCLUSION

Moderately obese patients whose BMI is less than the current guidelines for bariatric surgery will have similar weight loss and associated benefits. Laparoscopic adjustable gastric banding is a safe and effective treatment for patients with a BMI of 30-35 kg/m(2).

Laparoscopic upper gut surgery

Australian surgeons have been prominent in the introduction, development, and consolidation of laparoscopic surgery of the upper gut. In doing this, some of the very best principles of surgical innovation have been in evidence: preliminary animal work in which to test hypotheses and techniques, followed by careful application and documentation in the clinical setting, randomized clinical trials and finally academic reporting and ongoing development. This review documents the introduction of laparoscopic surgery for gastroesophageal reflux, hiatus hernia, achalasia, gastroesophageal malignancy, obesity, and a range of emergency conditions in Australia. Those involved are regarded as world leaders in their field. A vital component of this success has been the close cooperation between surgeons and gastroenterologists within the Gastroenterological Society of Australia.

Management of band erosion with omental plugging: case series from a 5-year laparoscopic gastric banding experience

BACKGROUND

Although reports on band erosion management after laparoscopic adjustable gastric banding (LAGB) agree that in most cases the affected band will need to be removed, there is no consensus on the technique of removal. We report a minimalistic, laparoscopic technique which is safe and avoids management delay.

METHODS

We retrospectively reviewed the operative log of our obesity surgery unit to find all operations performed on LAGB patients for erosion from Jan 2003 to Dec 2007. The cases that underwent this particular technique were identified. Case notes and electronic records were then reviewed for postoperative morbidity and outcomes. The operative technique and indications of this particular method is described which to our knowledge has not been reported before.

RESULTS

From 2003 to 2007, there were 865 LAGB performed. We identified 17 operations performed for erosions in this period; some referred from elsewhere. Among these, an omental plugging technique was used in five patients (median preoperative body mass index 46.5; median age 47; all female). Median timing of presentation was 8 months, with pain/pyrexia in all five (with coexisting obstructive symptoms in four) patients. At endoscopy, three were posterior, partial erosions. Intraoperatively, all were partial erosions (three posterior and two anterior). In theater, we removed the band in all cases and closed the defect with a vascularized omental plug, fashioned using a harmonic scalpel. There were no immediate postoperative complications. On follow-up, two patients stayed the same weight, but in three, the weight increased leading to two needing rebands (at 6 and 8 months).

CONCLUSIONS

Omental plugging is a way of managing LAGB erosion, which in our hands has led to an uneventful postoperative course and future rebanding without undue delay. It is suited patients with incomplete erosion when the endoscopic option is difficult, thereby removing the need for a surveillance period awaiting complete band erosion.

Perspective on biomaterials used in the surgical treatment of morbid obesity

Morbid obesity is defined as having a body mass index greater than or equal to 40.0 kg m(-2), or 37.0 kg m(-2) with comorbidities. Bariatric surgery remains the most effective treatment for morbid obesity. Bariatric procedures such as sleeve gastrectomy, vertical banded gastroplasty and adjustable gastric banding all generate excess body-weight loss typically over 3-5 years. The biomaterials used during these procedures, namely silicone, polypropylene, expanded polytetrafluoroethylene and titanium, are all non-degradable biomaterials. Hence, their presence in vivo exceeds the functional requirement of an implant to treat morbid obesity. Accordingly, research into non-invasive and reversible surgical procedures has increased, particularly in light of the dramatic increase in paediatric obesity. Tissue engineering is an alternative approach to treat morbid obesity, as it incorporates both engineering and biological principles into the design and development of an implant to surgically treat morbid obesity. It is hypothesized that a biodegradable polymer to treat morbid obesity could be developed to effectively promote excess weight loss. The aim of this review is to discuss morbid obesity with regards to its aetiology, prevalence and current modalities of treatment. Specifically, the shortcomings of the biomaterials currently used to surgically treat morbid obesity shall be reviewed, and alternative biomaterials shall be proposed.

American Association of Clinical Endocrinologists, The Obesity Society, and American Society for Metabolic & Bariatric Surgery medical guidelines for clinical practice for the perioperative nutritional, metabolic, and nonsurgical support of the bariatric surgery patient

American Association of Clinical Endocrinologists, The Obesity Society, and American Society for Metabolic & Bariatric Surgery Medical Guidelines for Clinical Practice are systematically developed statements to assist health-care professionals in medical decision making for specific clinical conditions. Most of the content herein is based on literature reviews. In areas of uncertainty, professional judgment was applied. These guidelines are a working document that reflects the state of the field at the time of publication. Because rapid changes in this area are expected, periodic revisions are inevitable. We encourage medical professionals to use this information in conjunction with their best clinical judgment. The presented recommendations may not be appropriate in all situations. Any decision by practitioners to apply these guidelines must be made in light of local resources and individual patient circumstances. The American Society for Parenteral & Enteral Nutrition fully endorses sections of these guidelines that address the metabolic and nutritional management of the bariatric surgical patient.