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Journal of Obesity
Volume 2012 (2012), Article ID 959260, 4 pages
Weight Loss after Sleeve Gastrectomy in Super Superobesity
1Service de Chirurgie Viscérale, Centre Hospitalier de Saint-Denis, 2 rue du Docteur Delafontaine, BP 279, 93205 Saint-Denis Cedex, France
2Service d’Endocrinologie, Hôpital Avicenne (AP-HP), Paris 13, 93000 Bobigny, France
Received 30 October 2011; Revised 2 May 2012; Accepted 11 June 2012
Academic Editor: Natan Zundel
Copyright © 2012 J.-M. Catheline et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Objective. This prospective study evaluated laparoscopic sleeve gastrectomy for its safety and efficiency in excess weight loss (%EWL) in super superobese patients (BMI Kg/m2). Results. Thirty patients (33 women and 7 men) were included, with mean age of 35 years (range 18 to 59). Mean preoperative BMI was 66 Kg/m2 (range 60 to 85). The study included one patient with complete situs inversus and 4 (14%) with previous restrictive gastric banding. The mean operative time was 120 minutes (range 80 to 220 min) and the mean hospital stay was 7.5 days (4 to 28 days). There was no postoperative mortality or need for a laparotomy conversion. Two subphrenic hematomas, one gastric fistula, and one pulmonary embolism, were the major complications. After 18 months 17 (77%) had sufficient weight loss and six had insufficient results, leading to either re-sleeve gastrectomy (3), or gastric bypass (2). Three years after the initial laparoscopic sleeve gastrectomy, the mean EWL was 51% (range 21 to 82). Conclusion. The laparoscopic sleeve gastrectomy is a safe and efficient operating procedure for treating super superobesity. In the case of insufficient weight loss, a second-stage operation like resleeve gastrectomy or gastric bypass can be proposed.
Surgery is the only effective treatment of morbid obesity. It is accepted that surgical treatment of super superobese patients (BMI > 60 kg/m²) and high-risk patients with comorbidities, is responsible for an increased risk of postoperative morbidity and mortality after bariatric surgery [1, 2].
Sleeve gastrectomy is a recently used surgical technique, with an acceptable rate of postoperative complications . It has been described as a first step before a gastric bypass or biliopancreatic diversion with duodenal switch . The restrictive technique of sleeve gastrectomy reduces the gastric capacity by approximately 80%. In his study, we report our experience with sleeve gastrectomy in super superobese patients.
This is a prospective study that included 30 consecutive super superobese patients and was designed to study the efficacy and safety of the sleeve gastrectomy in this group of these patients. The patients were operated between May 2004 and November 2009. For the 30 super superobese patients, we evaluated: the duration of intervention, the early (less than 30 days) and late postoperative complications, hospital stay, loss of excess weight (% EWL), and the need for a second operation in the case of insufficient weight loss.
All patients were operated by laparoscopy, and they were placed in the operating table according to the French position (the surgeon was positioned between the legs of the patient). Each intervention involved six trocars. The gastrocolic ligament was opened 4 cm from the pylorus. The greater curvature of the stomach was freed with the Ligasure (Covidien, Norwalk, CT, United States) until the angle of Hiss. The left crura of the diaphragm was systematically visualised and posterior attachments of the stomach released. A 34 French boogie was introduced into the stomach and positioned along the lesser curvature. The stomach was cut with an incision parallel to the boogie using a linear stapler (Endo GIA 45 Covidien, 4.8 mm, Norwalk, CT, United States). In each case, the resected stomach was placed in a plastic bag and was extracted via the umbilical trocar. Staple line was consistently reinforced by a nonabsorbable suture (Endostich Surgidac-2/0, Covidien, Norwalk, CT, United Kingdom). The fascia of each port site greater than 12 mm in diameter was always closed. A methylene blue test was performed to eliminate a leak. A drain was placed along the staple line. An upper gastrointestinal contrast study was performed the third postoperative day. Cautious refeeding was permitted in the absence of fistula, and patients were discharged after removal of the drain. Iron, vitamin, and essential mineral supplements were systematically given to the patient at their discharge.
Thirty patients underwent a laparoscopic sleeve gastrectomy, 23 women and 7 men. The average age was 35 years. All patients were super superobese with a mean BMI of 66 kg/m² (range from 60 to 85 kg/m²). The average preoperative weight was 168 kg (range 140–258 kg). Comorbidities are summarized in Table 1. One patient had a complete situs inversus and 4 others (14%) had previous gastric banding.
Mean operative time was 120 minutes (range 80 to 220 min). There was no conversion to laparotomy and no postoperative mortality. The average length of hospital stay was 7.5 days (range 4–28 days). Immediate postoperative complications occurred in 4 patients (14%): two presented subphrenic hematomas, one developed a gastric fistula, and one had pulmonary embolism. All three surgical complications required the creation of a laparoscopic drainage with no need for further surgical treatment.
The mean followup was 24 months. Of the 23 patients that had a followup greater than 18 months, weight loss was satisfactory in 17 patients (77%). Six patients had insufficient weight loss defined by a BMI between 35 to 40 kg/m², progressive weight regain or persistence of comorbidities supposed to improve with further weight loss. If the patient gave his consent for a second operation, then a gastro-intestinal contrast study was performed, in the presence of a dilated gastric pouch due either to incomplete gastric resection or to the persistence of hyperphagia responsible for a mechanical dilation a resleeve was proposed, otherwise, the choice of a gastric bypass was made (Figure 1). The choice of resleeve as a revisional surgery was made for 2 reasons firstly it is reasonable to reoperate a stomach when there is still a secondary gastric pouch a known cause of weight loss failure and secondly, resleeve according to our previous experience, although we do not have a long term followup, has been shown to have better results associated to less morbidity and mortality rates for superobese patients . Three out of six patients were reoperated with a resleeve gastrectomy, and two with a gastric bypass surgery 18 to 23 months after the initial procedure. The last patient refused a second operation. Three years after the original sleeve gastrectomy, the average loss of BMI was 20 kg/m² (range 10 to 39 kg/m², Figure 2). The average percentage of excess weight loss at 3 years was 51% (range 21–82%, Figure 3), while the average weight loss was 56 kg (range 28–144 kg) (Figure 4). During the followup, a port site hernia requiring surgical treatment was observed in 2 patients (7%). There were no other complications or iron and vitamin nutritional deficiencies during the followup.
Perioperative risks (morbidity and mortality) are known to be high for patients with super superobesity. The multidisciplinary team preoperatively should carefully evaluate the benefit/risk ratio of bariatric surgery in any given patient. Gastric banding presents less risk but is also less effective in super superobese patients . Gastric bypass and biliopancreatic diversion although associated to a higher morbidity ratio demonstrate excellent efficiency in regard to weight loss . The Magenstrasse technique uses a longitudinal section of the stomach without gastric resection has been proposed in super superobesity because of its lower morbidity and mortality . This procedure that divides the stomach into two compartments should be distinguished from sleeve gastrectomy, the technique reported in this paper. Preliminary results showed that the sleeve gastrectomy, after a 24-month period postroperatively was equally effective as gastric bypass in terms of weight loss in the super superobese patients while presenting lower risk for complications (3,6% to 9% resp.). The frequency of complications after gastric bypass in the super superobese can reach up to 23%  and up to 38% for duodenal switch . In the super superobese patients, the death rate was assessed up to 2.7% after gastric bypass  and 6.25% after duodenal switch . Among our 30 patients, we had 3 immediate postoperative complications like hematoma or fistula that were successfully treated with laparoscopic drainage. Current studies on the sleeve gastrectomy have published an average followup of less than 3 years [7, 9, 10] while two separate studies [6, 9] using a stapler line reinforcement, that is, the same technique with our team, reported also no postoperative morbidity and mortality.
The initial rapid weight loss, reported by previous studies [4, 9, 11], reached a plateau at 18 months after surgery . We found the presence of insufficient weight loss in only 23% of patients at 18 months. In our group of 30 patients, 23 had a followup more than 18 months, 5 had a second operation 3 of them had a resleeve gastrectomy and 2 a gastric bypass. It is known that the sleeve gastrectomy in the super superobese can be a definitive treatment for an average loss of excess weight by 50% at one year [3, 10]. We have shown that the sleeve gastrectomy for the super superobese can allow an average loss of excess weight by 53% at 18 months. If weight loss was insufficient, the sleeve gastrectomy could then be followed by a second operating procedure, like gastric bypass  or biliopancreatic diversion . The second operation presented less technical difficulties thanks to the weight loss already achieved since the first sleeve gastrectomy. Five patients were operated for a second time, three of them had a resleeve gastrectomy, and two a gastric bypass as a second-step procedure. Although we present a small group in this study, there were no postoperative complications associated to the excellent weight loss and these results demonstrate the efficacy as well as the safety of the second intervention.
It is known that bariatric surgery provokes weight loss through dietary restriction or through the malabsorption it imposes. The mechanisms responsible for decreased appetite are poorly understood. To make things more complicated some of the excellent early results like the decrease in blood sugar and insulin resistance seem to be independent from the weight loss . A great interest has been reported for the role of ghrelin , a hormone that is secreted by the gastric fundus a part of the stomach that is largely resected in a sleeve gastrectomy. Ghrelin is secreted under the influence of cholinergic stimulation and has probably a major role in controlling appetite since its receptors are present in the pituitary and hypothalamus. In humans, the serum concentration of ghrelin is increased in anorexia nervosa, Prader Willi syndrome, and in patients with a reduced caloric diet . Ghrelin’s concentrations are decreased by food intake and after gastrectomy or gastric bypass [13, 14]. The absence of contact between food and the lining of the stomach producing ghrelin inhibits its secretion . In the case of sleeve gastrectomy, the removal of the ghrelin-producing area could eventually explain the weight loss. This effect was reversed experimentally by the exogenous administration of ghrelin . Two separate studies reached the same conclusions with our team and have provided evidence for both an early and late ghrelin decrease after the sleeve gastrectomy [16, 17]. These specific hormonal mechanisms leading to weight loss need to be further elucidated .
The authors would like to thank ViVi Fysekidou for her comments and help in text editing.
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