OBJECTIVE: Obstructive sleep apnea (OSA) is a prevalent condition among electable to bariatric surgery obese patients, often remaining underdiagnosed, thereby increasing surgical risk. The main purpose was to determine prevalence of OSA among candidates for bariatric surgery and to assess the rate of underdiagnosis of this condition. Additionally, the study aimed to evaluate the specific performance of three sleep questionnaires and scales (Excessive Daytime Sleepiness Scale (EDSS), Epworth Sleepiness Scale (ESS), and STOP-Bang) in these patients.
METHODS: A longitudinal, prospective, single-cohort study, with consecutive sampling including patients aged 18-65 years with obesity grade II (body mass index (BMI) ≥ 35 kg/m2) and hypertension, type 2 diabetes, metabolic syndrome or OSA or obesity grade III or IV (BMI ≥ 40 kg/m2) elective for bariatric surgery. Patients were evaluated at the Otorhinolaryngology department with an anamnesis regarding OSA including the administration of three sleep questionnaires (EDSS, ESS, and STOP-Bang), followed by cardiorespiratory polygraphy (CRP) for sleep evaluation.
RESULTS: 124 patients were included in this study. While 74.2% of the sample exhibited OSA on CRP, only 28.2% had a prior diagnosis. The STOP-Bang questionnaire demonstrated the highest sensitivity (93.3%) for detecting moderate to severe OSA, although with low specificity (33.8%). EDSS and ESS did not show a significant association with the presence of OSA.
CONCLUSIONS: OSA screening is crucial in candidates for bariatric surgery due to its high prevalence and low diagnosis rate. The STOP-Bang questionnaire may serve as a useful tool for identifying patients at risk of moderate to severe OSA and optimizing sleep assessments. However, further research is necessary to validate its utility in this specific population.

Sleeve gastrectomy is a safe and effective bariatric surgery in terms of weight loss and longterm improvement or resolution of comorbidities. However, its achilles heel is the possible association with the development with the novo and/or worsening of pre-existing gastroesophageal reflux disease. The anatomical and mechanical changes that this technique induces in the esophagogastric junction, support or contradict this hypothesis. Questions such as «what is the natural history of gastroesophageal reflux in the patient undergoing gastric sleeve surgery?», «how many patients after vertical gastrectomy will develop gastroesophageal reflux?» and «how many patients will worsen their previous reflux after this technique?» are intended to be addressed in the present article.

Obesity represents a major global health challenge. Female sexual dysfunctions have a negative impact on quality of life and overall health balance. A higher rate of female sexual dysfunctions in obese women has been suggested. This systematic review summarized the literature on female sexual dysfunction prevalence in obese women. The review was registered (Open Science Framework OSF.IO/7CG95) and a literature search without language restrictions was conducted in PubMed, Embase and Web of Science, from January 1990 to December 2021. Cross-sectional and intervention studies were included, the latter if they provided female sexual dysfunction rate data in obese women prior to the intervention. For inclusion, studies should have used the female sexual function index or its simplified version. Study quality was assessed to evaluate if female sexual function index was properly applied using six items. Rates of female sexual dysfunctions examining for differences between obese vs class III obese and high vs low quality subgroups were summarized. Random effects meta-analysis was performed, calculating 95% confidence intervals (CI) and examining heterogeneity with I2 statistic. Publication bias was evaluated with funnel plot. There were 15 relevant studies (1720 women participants in total with 153 obese and 1567 class III obese women). Of these, 8 (53.3%) studies complied with >4 quality items. Overall prevalence of female sexual dysfunctions was 62% (95% CI 55-68%; I2 85.5%). Among obese women the prevalence was 69% (95% CI 55-80%; I2 73.8%) vs 59% (95% CI 52-66%; I2 87.5%) among those class III obese (subgroup difference p=0.15). Among high quality studies the prevalence was 54% (95% CI 50-60%; I2 46.8%) vs 72% (95% CI 61-81%; I2 88.0%) among low quality studies (subgroup difference p=0.002). There was no funnel asymmetry. We interpreted that the rate of sexual dysfunctions is high in obese and class III obese women. Obesity should be regarded as a risk factor for female sexual dysfunctions.

Postprandial hyperinsulinaemic hypoglycaemia is a common complication of bariatric surgery. Although in general its evolution is mild and self-limited, it can lead to neuroglycopaenia and compromise the patient\'s safety and quality of life. The aim of this document is to offer some recommendations to facilitate the clinical care of these complex patients, reviewing the aetiopathogenesis, its diagnosis and treatment that, sequentially, will include dietary and pharmacological measures and surgery in refractory cases. In the absence of high-quality studies, the diagnostic and therapeutic approach proposed is based on the consensus of experts of the Grupo de Obesidad de la Sociedad Española de Endocrinología y Nutrición [Obesity Group of the Spanish Society of Endocrinology and Nutrition], GOSEEN. Those undergoing bariatric surgery should be informed of the possibility of developing this complication.

BACKGROUND: Non-alcoholic fatty liver disease (NAFLD) is highly prevalent in morbid obesity (MO). A considerable proportion of patients with MO have non-alcoholic steatohepatitis (NASH). Liver biopsy (LB) is the only procedure that reliably differentiates NASH from other stages of NAFLD, but its invasive nature prevents it from being generalisable. Hence, non-invasive assessment is critical in this group of patients.
OBJECTIVE: To report NAFLD/NASH prevalence in a cohort of patients with MO and to identify predictors of NASH.
METHODS: Fifty-two consecutive patients subjected to bariatric surgery in a University hospital in Spain underwent LB. Anthropometric, clinical and biochemical variables were registered. According of the results of the LB, individuals were classified by whether they had NASH or not. Multiple logistic regression analysis was performed to identify independent factors associated with NASH.
RESULTS: NAFLD was reported in 94.2% of the patients, simple steatosis was present in 51.92% and NASH in 42.31%. Meanwhile, 17.3% of patients exhibited significant fibrosis (≥F2). HIGHT score for NASH risk was established using five independent predictors: systemic Hypertension, Insulin resistance, Gamma-glutamyl transferase, High density lipoprotein cholesterol and alanine Transaminase. This score ranges from 0 to 7 and was used to predict NASH in our cohort (area under the receiver operator characteristic curve 0.846). A score of 4 or greater implied high risk (sensitivity 77.3%, specificity 73.3%, positive predictive value 68%, negative predictive value 81.5%, accuracy 75%).
CONCLUSIONS: NAFLD is practically a constant in MO with a considerable proportion of patients presenting NASH. The combination of five independent predictors in a scoring system may help the clinician optimise the selection of patients with MO for LB.

OBJECTIVE: To present our experience in the clinical follow-up of patients undergoing a gastric bypass.
METHODS: Description of six cases under follow-up by our unit after undergoing a gastric bypass at another private centre.
RESULTS: The 6 patients presented complications, the most notable being the death of one patient due to severe malnutrition and the need for revision surgery in another for the same reason, destabilisation of type 1 diabetes mellitus in another patient and fat-soluble vitamin deficiency in all of them.
CONCLUSIONS: There are few publications that support the safety of gastric bypass as a treatment for obesity. In our experience, it is a technique associated with a high rate of serious complications. As it is a technique that is not yet standardised, we consider that these cases should be operated on in centres where there is a multidisciplinary team with expertise in the management of possible complications, with close follow-up by surgeons and endocrinologists.

Non-alcoholic fatty liver disease (NAFLD) is a chronic disease that may lead to cirrhosis and hepatocellular carcinoma; its close relationship with obesity and the metabolic syndrome involves an increasing prevalence. Invasive liver biopsy is the gold standard diagnosis technique for NAFLD but entails risks. Therefore, transient elastography, a non-invasive technique with high reliability, is frequently used in clinical practice. Bariatric surgery is the only effective treatment for long-term weight loss and obesity-related metabolic conditions improvement. Although studies report encouraging results of bariatric surgery as a valuable therapy for NAFLD, guidelines for its use in NAFLD are ambiguous. Indeed, the mechanisms driving this improvement are largely unknown, but likely involve weight loss-dependent and independent factors including anatomic and hormonal changes. This review aims to update the relationship between NAFLD and bariatric surgery, focusing on the indications for surgery and the mechanisms implied in NAFLD improvement.

BACKGROUND: Bariatric surgery (BS) has shown to reduce cardiovascular morbidity and mortality in obesity. The BS has improved the dyslipidemia of the insulin resistant patient, our objective was to evaluate if there was a difference in the lipid profile between the laparoscopic roux-en-Y gastric bypass (RYGB) technique vs. the sleeve gastrectomy (SG) technique at 18 months of follow-up.
METHODS: An observational, open, prospective study of morbidly obese patients who underwent bariatric surgery at 18-month follow-up. Anthropometric analysis, body composition, energy expenditure at rest, glucose, insulin, HbA1c, LDL, HDL, TG and CT were performed.
RESULTS: Absence baseline differences were found in the proportion of patients with hypertension, diabetes, steatosis, and sex between the RYGB vs SG groups. A reduction of TG was observed at 6 months in favor of RYGB vs SG: 108.60±34.86 vs. 124.59±44.58, P = 0.044), however, a decrease in both LDL levels was found at 12 and 18 months in favor of the RYGB vs. SG group: 96.23±24.33 vs. 107.83±28.88, P = 0.025; 90.98±20.62 vs 106.22±31.48, P = 0.003; the decrease in CT was observed only at 18 months in favor of the RYGB vs. SG group: 171.39±25.058 vs. 186.89±31.81, P = 0.005. CONCLUSIóN: RYBG has shown to be more effective in reducing LDL and CT levels compared to SG, which provides an additional benefit of RYGB in relation to the lipid profile of the patient.

BACKGROUND: Morbid obesity is a disease with multiple comorbidities and considerably limits the quality of life and life expectancy. Bariatric surgery is an effective therapeutic alternative in these patients; it acts on the decrease and / or absorption of nutrients, achieving a significant weight loss which is maintained over time. The objective of the study is to determine the long-term results, in terms of efficacy, regarding weight loss, the resolution of comorbidities and improvement in the quality of life of our patients.
METHODS: This was a retrospective study that comprised all patients consecutively undergoing laparoscopic bariatric surgery at our center over a 10 year period. In all patients, the anthropometric and clinical data were collected prior to surgery and in subsequent protocolized visits after surgery. At the end of the follow-up, a BAROS questionnaire was used that recorded weight loss, the resolution of comorbidities, complications and the quality of life test completed by the patients.
RESULTS: 353 patients (303 GBPRY and 50 GV), 105 men and 248 women, with a mean age of 42.14 ± 10.16 years, BMI 48.63 kg / m2 and 68.5% had some comorbidity. The mean follow-up was 5.7 ± 2.6 years for 96.7% of the total number operated on. At the end of the follow-up the %EWL was 59.00 ± 19.50, %EBMIL 68.15 ± 22.94, the final BMI 32.65 ± 5.98 and 31.3% of the patients had %EWL ≤ 50. The resolution of comorbidities was as follows: 48.7% hypertension, 70.3% Type 2 Diabetes, 82.6% DLP and 71.6% SAHS. The result of the quality of life test was 1.51 ± 0.93, with 67.2% of patients reporting good or very good quality, with the highest score being for self-esteem, followed by physical condition, work and social activity, and the lowest being for sexual quality of life in that only 40.3% reported an improvement. The BAROS score was 4.35 ± 2.06 with 84.7% of the patients in the good to excellent range, while 91.2% of all patients would undergo surgery again.
CONCLUSIONS: Bariatric surgery is an effective technique for reducing weight, resolving comorbidities and improving the quality of life of patients with morbid obesity, mainly in its physical aspect. In our series, the percentage of follow-up and average time was within the range of established quality standards.

OBJECTIVE: To evaluate the appearance of gastroesophageal reflux in our population after sleeve gastrectomy as management for obesity, with the Gastroesophageal Reflux Disease Questionnaire (GerdQ).
METHODS: Retrospective study of patients undergoing sleeve gastrectomy during 2016 and 2017, having ruled out gastroesophageal reflux (GER) with pre-surgical upper digestive endoscopy, and post-operative evaluation with the GerdQ scale.
RESULTS: 129 patients were included in the study, average age was 45 years, gender of greater male appearance was 77.5%, the most frequent comorbidities were hypothyroidism 25.6% and hypertension 23.3%. 12.4% had a score greater than or equal to 8, 14 were women and 2 men, there was no statistically significant relationship with the preoperative mass index.
CONCLUSIONS: Standardizing the gastric sleeve technique in the bariatric surgery services, taking into account the technical factors associated with post-operative GERD de novo, decreases its appearance as evaluated by the GerdQ scale.
OBJECTIVE: Evaluar la aparición de reflujo gastroesofágico (RGE) posterior a gastrectomía en manga como manejo para la obesidad, con el Gastroesophageal Reflux Disease Questionnaire (GerdQ).
UNASSIGNED: Estudio retrospectivo de pacientes llevados a gastrectomía en manga durante 2016 y 2017, habiendo descartado RGE con endoscopia digestiva alta prequirúrgica, y evaluación posoperatoria con la escala GerdQ.
RESULTS: Se incluyeron en el estudio 129 pacientes, con un promedio de edad de 45 años, el 77.5% de sexo masculino y como comorbilidad más frecuente hipotiroidismo (25.6%) e hipertensión arterial (23.3%). El 12.4% tenían un puntaje ≥ 8, 14 eran mujeres y 2 hombres, y no hubo relación estadísticamente significativa con el índice de masa corporal preoperatorio.
CONCLUSIONS: Estandarizar la técnica de manga gástrica en los servicios de cirugía bariátrica, teniendo en cuenta los factores técnicos asociados a RGE posoperatorio de novo, disminuye la aparición de RGE según lo evaluado por la escala GerdQ.