BRAZILIAN MULTI-SOCIETY POSITION STATEMENT ON EMERGING BARIATRIC AND METABOLIC SURGICAL PROCEDURES.

This Brazilian multi-society position statement on emerging bariatric and metabolic surgical procedures was issued by the Brazilian Society of Bariatric and Metabolic Surgery (SBCBM), the Brazilian College of Digestive Surgery (CBCD), and the Brazilian College of Surgeons (CBC). This document is the result of a Brazilian Emerging Surgeries Forum aimed at evaluating the results of surgeries that are not yet listed in the Federal Council of Medicine (CFM), the regulatory agency that oversees and regulates medical practice in Brazil. The Forum integrated more than 400 specialists and academics with extensive knowledge about bariatric and metabolic surgery, representing the three surgical societies: SBCBM, CBC, and CBCD. International speakers participated online and presented their experiences with the techniques under discussion, emphasizing the regulatory policies in their countries. The indications for surgery and the subsequent procedures were carefully reviewed, including one anastomosis gastric bypass (OAGB), single anastomosis duodeno-ileal with sleeve gastrectomy (SADI-S or OADS), sleeve gastrectomy with transit bipartition (SGTB), and sleeve gastrectomy with ileal interposition (SGII). The recommendations of this document are based on an extensive literature review and discussions among bariatric surgery specialists from the three surgical societies. We concluded that patients with a body mass index over 30 kg/m2 may be candidates for metabolic surgery in the presence of comorbidities (arterial hypertension and type 2 diabetes) with no response to clinical treatment of obesity or in the control of other associated diseases. Regarding the surgical procedures, we concluded that OAGB, OADS, and SGTB are associated with low morbidity rates, satisfactory weight loss, and resolution of obesity-related comorbidities such as diabetes and arterial hypertension. SGII was considered a good and viable promising surgical alternative technique. The recommendations of this statement aim to synchronize our societies with the sentiments and understandings of most of our members and also serve as a guide for future decisions regarding bariatric surgical procedures in our country and worldwide.

Influence of Gastric Bypass on Obese Women Sexual Function-a Prospective Study.

INTRODUCTION: Obesity may lead to hyperandrogenia and affect female sexual function. The study aims to evaluate female sexual function and androgenic profile in obese women after laparoscopic Roux-en-Y gastric bypass (LRYGB). METHODS: Forty obese women with a mean age of 34 years were prospectively studied. Diabetes and psychiatric and pelvic disorders were the exclusion criteria. All patients underwent LRYGB. Total (TT) and free (FT) testosterone, androstenedione (AD), dehydroepiandrosterone (DHEA) and the Sexual Quotient - Female Version were evaluated, preoperatively, 6 and 12 months after the operation. RESULTS: Preoperative incidence of sexual dysfunction was 10% and hyperandrogenia was 40%. At 6 months, sexual function was not different; and FT (0.49-0.33 ng/dl) and AD (2.0-1.3 ng/dl) decreased significantly. At 12 months, there was an improvement in female sexual function (77-84 points), related to desire and interest (22-25 points) and comfort (15.9-17.3 points) without case of sexual dysfunction at 12 months. Hyperandrogenia (40-8%), FT levels (0.5-0.3 ng/dl), and AD (2.0-1.4 ng/dl) decreased, while DHEA levels (3.4-4.2 ng/dl) increased. The percentage of weight loss was 22% and 31% at 6 and 12 months, respectively. Sexual function did not correlate with BMI, weight, or androgen levels in any period. CONCLUSION: Female sexual function in obese women with no diabetes and psychiatric and pelvic disorders improved in patients undergoing LRYGB, especially in desire, interest, and sexual comfort, and this occured after 6 months of the operation and unrelated to BMI, percentage of weight loss, or androgen levels. KEY POINTS: • In obese women with no diabetes and psychiatric and pelvic disorders the FSD improvement after LRYGB. • FSD no correlation with weight loss and BMI. • FSD no correlation with androgens levels.

Brazilian multi-society position statement on emerging bariatric and metabolic surgical procedures / Posição das sociedades brasileiras sobre procedimentos cirúrgicos bariátricos e metabólicos emergentes

ABSTRACT This Brazilian multi-society position statement on emerging bariatric and metabolic surgical procedures was issued by the Brazilian Society of Bariatric and Metabolic Surgery (SBCBM), the Brazilian College of Digestive Surgery (CBCD), and the Brazilian College of Surgeons (CBC). This document is the result of a Brazilian Emerging Surgeries Forum aimed at evaluating the results of surgeries that are not yet listed in the Federal Council of Medicine (CFM), the regulatory agency that oversees and regulates medical practice in Brazil. The Forum integrated more than 400 specialists and academics with extensive knowledge about bariatric and metabolic surgery, representing the three surgical societies: SBCBM, CBC, and CBCD. International speakers participated online and presented their experiences with the techniques under discussion, emphasizing the regulatory policies in their countries. The indications for surgery and the subsequent procedures were carefully reviewed, including one anastomosis gastric bypass (OAGB), single anastomosis duodeno-ileal with sleeve gastrectomy (SADI-S or OADS), sleeve gastrectomy with transit bipartition (SGTB), and sleeve gastrectomy with ileal interposition (SGII). The recommendations of this document are based on an extensive literature review and discussions among bariatric surgery specialists from the three surgical societies. We concluded that patients with a body mass index over 30 kg/m2 may be candidates for metabolic surgery in the presence of comorbidities (arterial hypertension and type 2 diabetes) with no response to clinical treatment of obesity or in the control of other associated diseases. Regarding the surgical procedures, we concluded that OAGB, OADS, and SGTB are associated with low morbidity rates, satisfactory weight loss, and resolution of obesity-related comorbidities such as diabetes and arterial hypertension. SGII was considered a good and viable promising surgical alternative technique. The recommendations of this statement aim to synchronize our societies with the sentiments and understandings of most of our members and also serve as a guide for future decisions regarding bariatric surgical procedures in our country and worldwide.

RESUMO Esta declaração multissocietária de posicionamento sobre novos procedimentos cirúrgicos bariátricos e metabólicos emergentes foi emitida pela Sociedade Brasileira de Cirurgia Bariátrica e Metabólica (SBCBM), pelo Colégio Brasileiro de Cirurgia Digestiva (CBCD) e pelo Colégio Brasileiro de Cirurgiões (CBC). Este documento é resultado do Fórum Brasileiro de Cirurgias Emergentes, realizado com o objetivo de avaliar os resultados de cirurgias ainda não listadas no Conselho Federal de Medicina (CFM), órgão regulador que fiscaliza e regulamenta a prática médica no Brasil. O Fórum integrou mais de 400 especialistas e acadêmicos com amplo conhecimento sobre cirurgia bariátrica e metabólica, representando as três sociedades cirúrgicas: SBCBM, CBC e CBCD. Palestrantes internacionais participaram online e apresentaram suas experiências com as técnicas em discussão, enfatizando as políticas regulatórias de seus países. As indicações para cirurgia e os procedimentos subsequentes foram cuidadosamente revisados, incluindo bypass gástrico de uma anastomose (OAGB), anastomose duodeno-Ileal única com gastrectomia vertical (OADS ou SADI-S), gastrectomia vertical com bipartição de trânsito (SGTB) e gastrectomia vertical com interposição ileal (SGII). As recomendações deste documento são baseadas em extensa revisão da literatura e discussões entre especialistas em cirurgia bariátrica das três sociedades cirúrgicas. Concluímos que pacientes com índice de massa corpórea (IMC) acima de 30 kg/m2 podem ser candidatos à cirurgia metabólica na presença de comorbidades (hipertensão arterial e diabetes tipo 2), sem resposta ao tratamento clínico da obesidade ou no controle de outras doenças associadas. Em relação aos procedimentos cirúrgicos, concluímos que OAGB, OADS e SGTB estão associados a baixas taxas de morbidade e com perda de peso satisfatória e resolução de comorbidades relacionadas à obesidade, como diabetes e hipertensão arterial. A SGII foi considerada uma boa e viável técnica cirúrgica, sendo considerada uma alternativa promissora. As recomendações desta declaração visam sincronizar nossas sociedades com os sentimentos e entendimentos da maioria de nossos membros e também servir como um guia para futuras decisões sobre procedimentos cirúrgicos bariátricos em nosso país e no mundo.

Preoperative progressive pneumoperitoneum in obese patients with loss of domain hernias.

BACKGROUND: Repair of hernias with loss of domain in obese patients can lead to acute respiratory failure. OBJECTIVES: The objective of this study was to analyze preoperative progressive pneumoperitoneum (PPP) in increasing abdominal cavity volume and its impact on respiratory function. SETTING: The study was conducted at the University Hospital, State University of Londrina, Brazil, which is a referral center for the treatment of obesity. The patients were hospitalized for the duration of the study. METHODS: Sixteen obese patients were evaluated. Computed tomography was used to determine hernia sac volume (HSV) and abdominal cavity volume (ACV). Respiratory function was evaluated by measuring vital capacity and forced expiratory volume in the first second (FEV-1). All data were obtained before PPP, on the day before surgery, and on the second postoperative day. PPP was performed daily with insufflation of CO2. RESULTS: The number of insufflations was 12. The average of total volume inflated was 5.7 L. The HSV was 2953 cm3 before PPP and 1935 cm3 after PPP. The average ACV increased from 8898 to 11,317 cm3 after PPP. The relationship between HSV and ACV was 38.2% before and 16.3% after PPP. There was a favorable improvement in respiratory function with an increase in vital capacity from 1875 to 2760 mL and an increase in FEV-1 from 1060 to 1670 mL after PPP. Respiratory function tests after surgery showed values of 2600 and 1560 mL, respectively, for cavity volume and FEV-1. There were no postoperative respiratory complications. CONCLUSIONS: This technique can be used safely in the surgical preparation of obese patients with hernias with loss of domain, reducing the relation between HSV and ACV and avoiding pulmonary complications.

Weight loss outcome after silastic ring Roux-en-Y gastric bypass: five years of follow-up.

BACKGROUND: An underlying major aim of bariatric surgery is weight loss and its long-term maintainance. In spite of this, most studies regarding weight loss after surgical treatment of morbid obesity, show 3-year follow-up results. We evaluated the effectiveness of Silastic ring Roux-en-Y gastric bypass (SR-RYGBP) in promoting significant weight loss after a 5-year follow-up at the Londrina State University Hospital. METHODS: From May 1999 to December 2000, 211 morbidly obese patients were submitted to SR-RYGBP, by the same surgical team. The study's design was longitudinal, prospective and descriptive. The analysis of postoperative ponderal decrease was based on excess weight loss in percentage (%EWL) and the calculation of the BMI. Therapeutic failure was considered when patients lost <50% of excess weight at 2-years follow-up. RESULTS: Patient loss to follow-up loss was 13%; therefore 183 patients were included in this study. The average global EWL was: 67.6% +/- 14.9 at the first postoperative year; 72.6% +/- 14.9 at the second year; and 69.7% +/- 15.1 in the fifth postoperative year. Surgical treatment failure occurred in 12 patients (6.5%) during the 5-year follow-up. CONCLUSIONS: SR-RYGBP was effective in promoting and maintaining weight loss in the long-term, with a low failure rate.

PREOPERATIVE MANOMETRY FOR THE SELECTION OF OBESE PEOPLE CANDIDATE TO SLEEVE GASTRECTOMY.

BACKGROUND: Sleeve gastrectomy may alter esophageal motility and lower esophageal sphincter pressure. AIM: To detect manometric changings in the esophagus and lower esophageal sphincter before and after sleeve gastrectomy in order to select patients who could develop postoperative esophageal motilitity disorders and lower esophageal sphincter pressure modifications. METHODS: Seventy-three patients were selected. All were submitted to manometry before the operation and one year after. The variables analyzed were: resting pressure of the lower esophageal sphincter, contraction wave amplitude, duration of contraction waves, and esophageal peristalsis. Data were compared before and after surgery and to the healthy and non-obese control group. Exclusion criteria were: previous gastric surgery, reflux symptoms or endoscopic findings of reflux or hiatal hernia, diabetes and use of medications that could affect esophageal or lower esophageal sphincter motility. RESULTS: 49% of the patients presented preoperative manometric alterations: lower esophageal sphincter hypertonia in 47%, lower esophageal sphincter hypotonia in 22% and increase in contraction wave amplitude in 31%. One year after surgery, manometry was altered in 85% of patients: lower esophageal sphincter hypertonia in 11%, lower esophageal sphincter hypotonia in 52%, increase in contraction wave amplitude in 27% and 10% with alteration in esophageal peristalsis. Comparing the results between the preoperative and postoperative periods, was found statistical significance for the variables of the lower esophageal sphincter, amplitude of contraction waves and peristalsis. CONCLUSION: Manometry in the preoperative period of sleeve gastrectomy is not an exam to select candidates to this technique.

Computerized baropodometry in obese patients.

BACKGROUND: Few studies have investigated the influence of obesity on the structural and functional performance of the feet, and its potential implications for the musculoskeletal system. Computerized baropodometric analysis (CPA) is a new investigation for the center of pressure, plantar surface area and plantar pressure while standing on the platform of a specialized apparatus. CPA is relevant to gait and posture, and may be important as well for postoperative musculoskeletal disorders. We investigated the biomechanical dysfunctions of foot pressure by means of CPA in bariatric and non-bariatric subjects. METHODS: Subjects (n=67, 71.6% females, age 40.8 +/- 13.8 years, BMI 31.4 +/- 11.0 kg/m(2)) included obese (BMI 30.0-60.0 kg/m(2), n=27), overweight (BMI 25.0-29.9 kg/m(2), n=12) and normal-weight controls (BMI 20.0-24.9 kg/m(2), n=28) of equivalent age and gender. Variables included center of pressure location, plantar ground contact area and pressure, and pressure patterns (maximum and average) in different regions of the foot, during quiet standing on the platform of the baropodometer. RESULTS: A significant increase was detected for peak pressure on forefoot and plantar ground contact area in the obese group, compared to control and overweight cases, during quiet standing. CONCLUSION: Excessive forefoot pressure and enlarged support area were a consequence of obesity, mirroring the efforts of the obese subject to acquire a wider and stronger support base. Although this is originally a physiological change, it may result in maladaptative and degenerative musculoskeletal consequences. Re-education exercises may be advised, in combination with bariatric surgery in the morbidly obese, aiming at restoration of normal gait and posture, as well as at minimization of stress damage to bones and joints in the axial skeleton.

Rhabdomyolysis after bariatric surgery.

BACKGROUND: Rhabdomyolysis is a potential threat after bariatric surgey. The severity ranges from asymptomatic elevations of serum muscle enzyme levels to life-threatening cases associated with muscle necrosis, compartment syndrome, acute renal failure and cardiac arrest. METHODS: We studied 98 consecutive obese patients who underwent primary uncomplicated bariatric surgery during a 1-year period. A database was created for all patients (sex, age, BMI, duration of the operation); serum creatinine phosphokinase (CPK) was systematically measured before surgery and on the first and second postoperative day. RESULTS: The study sample consisted of 35 males (35.7%) and 63 females (64.3%) with preoperative CPK level 156.6 +/- 41.1 U/L (40 to 220), 24 hours postoperatively 1,075.2 +/- 596.5 U/L, (85 to 2,790 U/L) and 48 hours postoperatively 967.3 +/- 545.3 U/L (79 to 2,630). There was no difference in mean BMI (P=0.1) and mean duration of operation (P=0.5) between males and females. However, a statistically significant difference in mean elevation of CPK between males and females (P=0.003) was found. The variables sex, age, weight and duration of surgery were analyzed by multivariate logistic regression, but did not show a statistically significant difference. CONCLUSION: Rhabdomyolysis is a potentially fatal complication of surgical procedures in obese patients, and can be minimized with simple measures such as additional padding, aggressive hydration and urine alkalinization. Diagnosis requires a high level of physician awareness.

Postural changes in morbidly obese patients.

BACKGROUND: Postural deviations in morbidly obese individuals may contribute to low self-esteem and to long-term adverse effects on bones and joints. In a case-control study, the axial skeleton was investigated, to disclose the main abnormalities found in obese compared to non-obese groups. METHODS: 2 groups were compared. Group 1, severely obese patients (n= 32), age 41.5 +/- 8.2 years, BMI 49.4 +/- 6.6 kg/m2, 93.8% females, and group 2 non-obese (n= 30), age 43.5 +/- 5.8 years, BMI 24.6 +/- 5.1 kg/m2, 96.7% females, had their posture analyzed through clinical examination and radiological imaging. Variables measured were anterior, lateral and posterior angular deviation from the vertical body axis at the head, shoulders, pelvis, Thales triangle, spine, knees, ankles and feet. Data are shown as a percentage of abnormal angles in the 2 groups. RESULTS: On anterior analysis of the 2 groups, disturbances affected head (37.5% vs 13.3%), Thales angle (78.1% vs 53.3%), knees (84.4% vs 33.3%), legs (59.4% vs 30.0%) and support base (59.4% vs 26.7%) (P<0.05). On posterior view, the spine was the deranged segment (87.5% vs 36.7%) (P<0.05), and on lateral assessment, 100% of the results were abnormal. CONCLUSIONS: 1) Individuals with morbid obesity present important postural alterations. 2) Seriously altered posture was the rule for the obese population in this study, especially in the spine, knees and feet. 3) Most patients had compatible clinical complaints, but they rarely associated the bone and joint pain with the obesity and axial skeleton deviations. 4) Planned physical activity should be part of the treatment of severe obesity, in order to correct deviations, prevent new ones, and improve quality of life.

Gait cinematic analysis in morbidly obese patients.

BACKGROUND: Functional co-morbidities of excess body weight such as gait problems are never life-threatening like those associated with certain metabolic sequelae. Nevertheless, they may interfere with quality of life and also act as a mirror of muscle, bone and joint stress. In this prospective study, the goal was to document dynamic aspects of gait in severely obese subjects. METHODS: An outpatient population (age 47.2+/-12.9 years, 94.1% females, BMI 40.1+/-6.0 kg/m2, n=34) had their gait analyzed by an experienced physical therapist. Variables included speed, cadence, stride, support base and foot angle, which were compared to reference values for the Brazilian population. RESULTS: All variables were significantly lower in the obese patients, except for support base which was increased. Speed was 73.3+/-16.3 vs 130 cm/s, cadence was 1.4+/-0.2 vs 1.8 steps/s, stride was 106.8+/-13.1 vs 132.0 cm, and support was 12.5+/-3.5 vs 10.0 cm (P<0.05). CONCLUSIONS: 1) Widespread cinematic impairment was the rule in the studied population. 2) These findings are consistent with poor skeletal muscle performance, high metabolic expenditure and constant physical exhaustion. 3) Attention should be paid not only to the metabolic management but also to the physical rehabilitation required in cases of advanced obesity.

Accuracy of magnetic resonance in identifying traumatic intraarticular knee lesions.

PURPOSE: To evaluate the diagnostic accuracy of magnetic resonance imaging of the knee in identifying traumatic intraarticular knee lesions. METHOD: 300 patients with a clinical diagnosis of traumatic intraarticular knee lesions underwent prearthoscopic magnetic resonance imaging. The sensitivity, specificity, positive predictive value, negative predictive value, likelihood ratio for a positive test, likelihood ratio for a negative test, and accuracy of magnetic resonance imaging were calculated relative to the findings during arthroscopy in the studied structures of the knee (medial meniscus, lateral meniscus, anterior cruciate ligament, posterior cruciate ligament, and articular cartilage). RESULTS: Magnetic resonance imaging produced the following results regarding detection of lesions: medial meniscus: sensitivity 97.5%, specificity 92.9%, positive predictive value 93.9%, positive negative value 97%, likelihood positive ratio 13.7, likelihood negative ratio 0.02, and accuracy 95.3%; lateral meniscus: sensitivity 91.9%, specificity 93.6%, positive predictive value 92.7%, positive negative value 92.9%, likelihood positive ratio 14.3, likelihood negative ratio 0.08, and accuracy 93.6%; anterior cruciate ligament: sensitivity 99.0%, specificity 95.9%, positive predictive value 91.9%, positive negative value 99.5%, likelihood positive ratio 21.5, likelihood negative ratio 0.01, and accuracy 96.6%; posterior cruciate ligament: sensitivity 100%, specificity 99%, positive predictive value 80.0%, positive negative value 100%, likelihood positive ratio 100, likelihood negative ratio 0.01, and accuracy 99.6%; articular cartilage: sensitivity 76.1%, specificity 94.9%, positive predictive value 94.7%, positive negative value 76.9%, likelihood positive ratio 14.9, likelihood negative ratio 0.25, and accuracy 84.6%. CONCLUSION: Magnetic resonance imaging is a satisfactory diagnostic tool for evaluating meniscal and ligamentous lesions of the knee, but it is unable to clearly identify articular cartilage lesions.

Roux-en-Y gastric bypass: limb length and weight loss.

BACKGROUND: Roux-en-Y gastric bypass is a surgical technique widely used in the treatment of obesity. It is unclear, however, if the length of the biliopancreatic and alimentary limb interferes with the magnitude of weight loss. AIM: To evaluate if the length of these limbs is related to the percentage of weight loss one year after surgery. METHOD: One hundred and twenty obese people underwent surgery between 2009 and 2011. Patients were inserted into four groups: A) biliopancreatic limb with 50 cm length and alimentary limb with 100 cm length; B) biliopancreatic limb with 50 cm length and alimentary limb with 150 cm length; C) biliopancreatic limb with 100 cm length and alimentary limb with 100 cm length; D) biliopancreatic limb with 100 cm length and alimentary limb with 150 cm length. Age, gender, body mass index and the percentage of total weight loss were analyzed. Data were collected preoperatively and one year after surgery. The groups were compared and weight loss compared between groups. RESULTS: The follow-up occurred in 78.3% of the sample. The composition of the groups was similar, with no statistical significance. The average age was 43 years in groups A, C and D and 42 years in group B. The female gender predominated in all groups (about 60% of the sample). The mean body mass index was 46 kg/m2 for groups A, C and D and 42 kg/m2 in group B. The percentage of weight loss was 33% for group A and 34% for groups B, C and D. There was no significant difference among groups. CONCLUSION: Different lengths of the biliopancreatic and alimentary limbs did not affect the percentage of total weight loss.

Endoscopic findings of asymptomatic patients one year after Roux-en-Y gastric bypass for treatment of obesity.

BACKGROUND: In the late post-operative period, the necessity of performing an upper gastrointestinal endoscopy (GIE) to check for complications is controversial. Some authors suggest it should be routine for all patients, others selectively, but not all patients with endoscopic abnormalities are symptomatic and some abnormalities are potentially severe. The study was conducted to evaluate the endoscopic findings from asymptomatic obese patients after Roux-en-Y gastric bypass (RYGB) and correlate them with the demographic data and the presence of Helicobacter pylori (Hp). METHODS: A total of 715 asymptomatic patients were prospectively submitted to an upper GIE at the end of their first post-operative year. These examinations were evaluated for the presence of abnormalities, their prevalence and their potential severity. RESULTS: Abnormalities were found in 189 patients (26.5 %). Eighty-four (11.7 %) presented esophageal abnormalities, with 72 (10.1 %) characterized as esophagitis and 12 (1.7 %) as hiatal hernia. Forty-five patients (6.3 %) presented abnormalities of the stomach and the anastomosis, with 26 (3.6 %) characterized as anastomotic ulcers, nine (1.3 %) as stenosis of the gastrojejunal anastomosis, ten (1.4 %) as band erosion and 72 (10.1 %) as jejunitis. There was a statistically significant correlation between super obesity and band erosion. CONCLUSIONS: An upper GIE at the end of the first year of RYGB plays an important role, even for asymptomatic patients. One fourth of these asymptomatic patients had their treatment modified after the upper GIE was performed.

Weight loss outcome after Roux-en-Y gastric bypass: 10 years of follow-up.

BACKGROUND: By submitting obese people to surgical treatment, we hope they lose weight and stay slim. Long-term monitoring is essential to assess effectiveness of surgery. This study aims to evaluate weight loss over 10 years in an obese population undergoing banded Roux-en-Y gastric bypass (B-RYGBP). METHODS: The surgery was performed in 211 obese between May 1999 and December 2000. This prospective study evaluated excess weight loss (%EWL) and body mass index (BMI) during the period. We considered surgical treatment failure if %EWL was less than 50 %. RESULTS: We followed 54.9 % of the population (116 patients). Patients' %EWL was 67.6 ± 14.9 % 1 year after surgery, 72.6 ± 14.9 % after 2 years, 69.7 ± 15.1 % after 5 years, 66.8 ± 7.6 % after 8 years, and 67.1 ± 11.9 % after 10 years postoperatively. Surgical treatment failure occurred in 16 patients (14.6 %) over 10 years. CONCLUSIONS: B-RYGBP is a good technique to promote and maintain weight loss 10 years after surgery with low failure rate.

[Esophageal motility, symptoms, food intake and weight loss after Roux-en-Y gastric bypass]. / Motilidade esofágica, sintomas, resultado alimentar e perda de peso após derivação gástrica em Y-de-Roux.

BACKGROUND: Abnormal manometry findings can be found in the obese population. It is controversial if the manometry should be used to choose the adequate operation or if the motility status could predict symptomatic outcomes. AIM: To correlate the esophageal motility with postoperative symptoms, alimentary outcome and weight loss after Roux-en-Y gastric bypass. METHODS: One hundred and fourteen patients were submitted to the operation and were prospectively studied. They had no GERD symptoms or diseases that might interfere with esophageal motor function. One year after surgery patients were interviewed regarding current symptoms and eating habits. RESULTS: Excess weight loss was 66.2 %. Sixty (52.6%) patients had an abnormal manometry. Hypertensive lower esophageal sphincter was found in 18 (16%) patients and hypotonic sphincter in 31 (27%). Dumping syndrome was mentioned by 27 (23.6%) patients and 21 (18.4%) complained of regurgitation. Excellent, good, moderate and poor alimentary outcome was present in 32 (28%), 31 (27.2%), 39 (34.2%), 12 (11.6%) patients, respectively. Sphincter pressure and esophageal amplitude did not correlate with excess weight loss. Its average was significantly higher for patients with hypertensive esophageal amplitude. Regurgitation was more frequent in patients with a hypotensive sphincter. There is no correlation between dumping and sphincter pressure status; between dumping or regurgitation and esophageal amplitude; between alimentary outcomes and sphincter pressure status or esophageal amplitude. CONCLUSION: Esophageal manometry before Roux-en-Y gastric bypass is of limited clinical significance.

Urinary evaluation after RYGBP: a lithogenic profile with early postoperative increase in the incidence of urolithiasis.

BACKGROUND: The objective of this study was to assess predictors for new-onset stone formers after Roux-en-Y gastric bypass (RYGBP). METHODS: One hundred and fifty-one obese patients underwent RYGBP and were followed for 1 year. The analysis comprised two study time points: preoperative (T0) and 1 year after surgery (T1). They were analyzed for urinary stones, blood tests, and 24-h urinary evaluation. Nonparametric tests, logistic regression, and multivariate analysis were conducted using SPSS 17. RESULTS: Median BMI decreased from 44.1 to 27.0 kg/m2 (p < 0.001) in the postoperative period. Urinary oxalate (24 versus 41 mg; p < 0.001) and urinary uric acid (545 versus 645 mg; p < 0.001) increased significantly postoperatively (preoperative versus postoperative, respectively). Urinary volume (1310 versus 930 ml; p < 0.001), pH (6.3 versus 6.2; p = 0.019), citrate (268 versus 170 mg; p < 0.001), calcium (195 versus 105 mg; p < 0.001), and magnesium (130 versus 95 mg; p = 0.004) decreased significantly postoperatively (preoperative versus postoperative, respectively). Stone formers increased from 16 (10.6 %) to 27 (17.8%) patients in the postoperative analysis (p = 0.001). Predictors for new stone formers after RYGBP were postoperative urinary oxalate (p = 0.015) and uric acid (p = 0.044). CONCLUSIONS: RYGBP determined profound changes in urinary composition which predisposed to a lithogenic profile. The prevalence of urinary lithiasis increased almost 70% in the postoperative period. Postoperative urinary oxalate and uric acid were the only predictors for new stone formers.

Esophageal motility after laparoscopic Roux-en-Y gastric bypass: the manometry should be preoperative examination routine?

BACKGROUND: Our goal was to identify the changes of esophageal motility, lower esophageal sphincter (LES) function, and eating adaptation before and after Roux-en-Y gastric bypass (RYGBP) and whether manometry should be a routine examination in patients who undergo this procedure. METHODS: A total of 81 patients underwent manometry before surgery and 1 year after surgery. The control group consisted of 10 nonobese volunteers. Patients were classified as presenting with vomiting and without vomiting 1 year after surgery. Manometric variables were compared before and after surgery. Statistical analysis was performed using Wilcoxon and Mann-Whitney test. RESULTS: The patients (45.6%) had preoperative manometric findings, 29.8% had LES hypertonia, 18.9% LES hypotonia, 43.2% increase in wave amplitude of contraction, and three 8.1% abnormal peristalsis. One year after surgery manometry was abnormal in 62.9% of patients, 11.7% with hypertonia and 15.7% with hypotonia of the LES, 53% with changes in amplitude contraction and 19.6% with abnormal peristalsis. The control group showed no manometric abnormalities. Chronic vomiting was noted in 21% of patients. When comparing all variables between the pre and postoperative periods, there was no significant difference for all of them except for peristalsis. Comparing the results of manometric findings between the vomiting and non-vomiting groups, no significant changes were found in the variables studied. CONCLUSIONS: There was an association between RYGBP and motor abnormalities in the esophagus but no differences in postoperative feeding adaptation. Thus, we conclude that esophageal manometry is not necessary as a routine preoperative examination.

Preoperative manometry for the selection of obese people candidate to sleeve gastrectomy / Manometria pré-operatória para a seleção de obesos candidatos à gastrectomia vertical

ABSTRACT Background: Sleeve gastrectomy may alter esophageal motility and lower esophageal sphincter pressure. Aim: To detect manometric changings in the esophagus and lower esophageal sphincter before and after sleeve gastrectomy in order to select patients who could develop postoperative esophageal motilitity disorders and lower esophageal sphincter pressure modifications. Methods: Seventy-three patients were selected. All were submitted to manometry before the operation and one year after. The variables analyzed were: resting pressure of the lower esophageal sphincter, contraction wave amplitude, duration of contraction waves, and esophageal peristalsis. Data were compared before and after surgery and to the healthy and non-obese control group. Exclusion criteria were: previous gastric surgery, reflux symptoms or endoscopic findings of reflux or hiatal hernia, diabetes and use of medications that could affect esophageal or lower esophageal sphincter motility. Results: 49% of the patients presented preoperative manometric alterations: lower esophageal sphincter hypertonia in 47%, lower esophageal sphincter hypotonia in 22% and increase in contraction wave amplitude in 31%. One year after surgery, manometry was altered in 85% of patients: lower esophageal sphincter hypertonia in 11%, lower esophageal sphincter hypotonia in 52%, increase in contraction wave amplitude in 27% and 10% with alteration in esophageal peristalsis. Comparing the results between the preoperative and postoperative periods, was found statistical significance for the variables of the lower esophageal sphincter, amplitude of contraction waves and peristalsis. Conclusion: Manometry in the preoperative period of sleeve gastrectomy is not an exam to select candidates to this technique.

RESUMO Racional: A gastrectomia vertical pode determinar alterações na motilidade esofágica e no esfíncter inferior do esôfago. Objetivo: Estudar as alterações manométricas do esfíncter inferior do esôfago e do esôfago antes e depois da operação a fim de selecionar pacientes que pudessem desenvolver alterações pós-operatórias. Métodos: Setenta e três pacientes foram selecionados. Todos foram submetidos à manometria antes da operação e um ano após. As variáveis analisadas foram: pressão do esfíncter inferior do esôfago, amplitude e duração das ondas de contração e peristaltismo esofágico. Os dados foram comparados entre si antes e depois da operação e também com grupo controle saudável e não obeso. Critérios de exclusão foram: operação gástrica prévia, história de refluxo ou achado endoscópico de esofagite de refluxo ou de hérnia de hiato, diabete e uso de medicamentos que pudessem afetar a motilidade do esôfago ou do esfíncter esofágico inferior. Resultados: 49% dos pacientes apresentaram alterações no pré-operatório: hipertonia do esfíncter em 47%, hipotonia do esfíncter em 22% e aumento na amplitude das ondas de contração em 31%. Um ano após, a manometria encontrou-se alterada em 85% dos pacientes: hipertonia do esfíncter em 11%, hipotonia do esfíncter em 52%, aumento na amplitude das ondas de contração em 27% e 10% com alteração no peristaltismo esofágico. Comparando-se os resultados entre o pré e pós-operatório encontrou-se significância estatística para a pressão do esfíncter inferior do esôfago, amplitude das ondas de contração e peristaltismo. Conclusão: A manometria no pré-operatório da gastrectomia vertical não é fator de seleção dos candidatos a essa técnica.

Morphofunctional evaluation of the heart of obese patients before and after bariatric surgery.

BACKGROUND: This study aims to evaluate the effect of weight loss on the physical capacity and the structure and function of the heart after bariatric surgery. METHODS: Forty-three adult obese patients, 31 women (72.1%) and 12 men (27.9%), were submitted to electrocardiogram, ergometric test, and echo Doppler cardiogram at presurgical stage and 1 year after Roux-en-Y gastric bypass. The statistical analysis utilized the Wilcoxon, Student's t, and Shapiro-Wilk tests with 5% significance level. RESULTS: Weight was reduced from 116.5 ± 21.5 to 80 ± 15.9 kg and body mass index from 41.8 ± 4.4 to 28.4 ± 3.8 kg/m(2). Cardiac frequency was reduced from 77.9 ± 9.6 to 70.9 ± 7.8 bpm, systolic pressure from 130 ± 20 to 120 ± 10 mmHg, and diastolic pressure from 80 ± 10 to 80 ± 0 mmHg. Ergometric tests showed distance covered from 378.9 ± 126.5 to 595 ± 140.4 m, metabolic coefficient from 6.7 ± 2.4 to 8.3 ± 2.6 ml O(2)/kg/min, and oxygen consumption (VO(2)) from 23.1 ± 8.4 to 30 ± 10.3 metabolic equivalents of task. The echo Doppler cardiogram showed interventricular septum from 12 ± 2 to 10 ± 1 mm, posterior wall from 11 ± 2 to 10 ± 1 mm, and ventricular mass from 273 ± 85 to 216 ± 60 g. There was improvement in the diastolic function with an increase in the E'/A' and E/A relationship and the ejection fraction with an increase from 70.2 ± 7.2% to 72.9 ± 6.4%. CONCLUSIONS: Bariatric surgery improved physical capacity as well as structural and functional improvement of the heart.