No Differences in Metabolic Parameters Between Roux-en-Y Gastric Bypass and Sleeve Gastrectomy, Regardless of Achieved Weight Loss

Background: Roux-en-y (RYGB) is considered a procedure with more malabsorptive impact than sleeve Gastrectomy (SG), so the risk of chronic complications seems greater. Aim: To describe the metabolic profile and weight regain of patients who underwent bariatric surgery, according to each procedure. Method: A retrospective cohort with patients who underwent bariatric surgery (2003–2018). The sample was divided into SG group and RYGB group. Comparisons were made to analyze the relationship between the procedure itself and metabolic improvements, weight loss and weight regain. Results: We included 117 eligible participants (91.5 % female, 51.2% RYGB surgery), mean follow-up was 4.4± 3.3 years. Mean age was 41.8±6.8 years, without significant difference between the groups. Before the surgery, the groups were similar according metabolic profile (fasting glucose, Hba1c, total cholesterol, LDLc, triglycerides and HOMA IR), except by non-HDLc (RYGB 108.8±26.3 vs SG 127.2±33.2 mg/dl, p=0,002) and 25OHD (RYGB 28.9±4,7 vs SG 34.3±9,5 ng/ml, p=0.044). The RYGB group had greater weight than the SG group (mean 114.1±13.5 kg vs 122.7±20.5 Kg, p<0.0001) and almost 23.3% of the participants had T2DM and 36.2% of them had systemic arterial hypertension, without significant difference between the groups. The RYGB group had a greater postoperative time than the SG group (mean 5.0±4.0 vs 3.6± 2.9 years, respectively). After the surgery, although weight loss was greater in the RYGB group than the SG group (mean 39%±10.2 vs 34.1%±9.8, p<0.0001, respectively), both groups were similar regarding BMI, body fat percentage (BFP) and abdominal circumference. Also, there were no differences in the metabolic profile (fasting glucose, Hba1c, HOMA IR, leptin, triglycerides and HDLc), according to the type of surgery, except in the total cholesterol and LDLc levels (RYGB 167.9±28.2 vs SG 187.9±35.1 and RYGB 92.6±25.6 vs SG 109.5±30.8). Nearly the whole sample (95%) has reached > 20% weight loss. Despite that, 37.6% of the patients have regained > 20% of weight loss, with no relation regarding the type of surgery. Only 7% of the patients remained with some degree of glucose intolerance, with no difference between the groups. Conclusion: We found similar benefits among metabolic markers and weight regain after SG, compared to RYGB.

Secondary Hyperparathyroidism, Bone Density and Bone Turnover After Bariatric Surgery: Differences Between Roux-en-Y Gastric Bypass and Sleeve Gastrectomy

Introduction: Although malabsorption of nutrients and changes in intestinal adipokines and gut hormones induced by Roux-en-Y gastric bypass (RYGB) are considerably different than sleeve gastrectomy (SG), little is known about the consequences on bone health resulted by these two procedures. Objective: to compare the prevalence of secondary hyperparathyroidism (SHPT), bone mineral density (BMD), bone turnover markers and serum leptin in obese patients undergoing RYGB and SG, according to the time of surgery and percent weight loss. Methods: we studied 117 patients (91% female, 51% RYGB, mean age 41.8 ± 6.7 years, mean time of surgery 4.3 ± 3.4 years) who were divided into two groups according to the surgical procedure adopted (SG vs. RYGB). They were evaluated at different times after surgery (1–2 years, > 2 and <5 years and ≥5 years) and according to the percentage of weight loss (10–20%, >20% and <40%, ≥40%). Anthropometric measurements, body composition and BMD, bone parameters (PTH, corrected serum calcium, 25OHD, alkaline phosphatase -AP, C-telopeptide - CTX), and biochemical tests were compared. Results: The prevalence of SHPT (PTH ≥ 65pg/ml) was 26%, higher in the RYGB vs. SG (35% vs. 17%, respectively, p = 0.039), despite no significant differences in serum 25OHD (28.5 ± 7.3 vs. 27.6 ± 7.7 ng/ml, p=0.519) and corrected serum calcium (9.8 ± 0.6 vs. 9.8 ± 0.5 mg/dl, p = 0.466) between the groups. Mean serum PTH, CTX and AP was higher in the RYGB vs. SG (61.3 ± 29.5 vs 49.5 ± 32.3 pg/mL, p = 0.001; 0.596 ± 0.24 vs. 0.463 ± 0.23 ng/mL; 123.9 ± 60.8 vs. 100.7 ± 62.0 U/L, respectively). There were 13.5% decreases in femoral neck BMD in all patients, over the study period. After 5 years of surgery, the RYGB group showed greater bone loss in total body BMD (1.016 vs. 1.151g/cm2, -8.1%, p = 0.003) and total femur BMD (1.164 vs. 1.267g/cm2, - 11.7%, p = 0.007). Mean serum leptin was lower in the RYGB group, when compared to SG (7.6 ± 5.8ng/mL vs. 14.0 ± 9.9, p = 0.001), with no correlation with BMD in any site. There were no significant differences between the RYGB and SG regarding the other metabolic parameters. Conclusion: We found a more deleterious effect of RYGB on bone health up to 5 years postoperatively in comparison with SG.

MON-588 Anthropometric Parameters, Body Fat Percentage and Metabolic Profile in Sarcopenic Women with Recommendation for Bariatric Surgery

INTRODUCTION: Sarcopenia (SARC) is a musculoskeletal disorder that predisposes several complications, including metabolic ones. Obesity also provides higher risk for metabolic complications, however, there is lack of evidences regarding the association of obesity with SARC on metabolic parameters in non-elderly individuals. OBJECTIVE: To evaluate anthropometric parameters, body fat percentage (BFP) and metabolic parameters in women with and without SARC preceding Bariatric Surgery (BS). METHODS: A cross-sectional study involving 60 obese women in the outpatient care in a public Brazilian University Hospital between March to September 2018. Body composition was given by bio-impedance (inbody-370), multifrequency (5, 50, 250Hz) with 12 hours fasting, dominant Handgrip Strength (HS) was evaluated by Jamar dynamometer (3 measurements; 30 sec interval). Were also evaluated fasting blood glucose, HbA1c, homeostatic model assessment-insulin resistance (HOMA-IR), total cholesterol (TC), low density lipoprotein (LDL), high density lipoprotein (HDL), triglycerides and high-sensitive C-reactive protein (hs-CRP). SARC was defined by the association of a low muscle mass index (weight-adjusted appendicular skeletal muscle mass: ASMM/weight x 100%) and decreased HS, using as cutoff points the smallest quintile for each variable. Data were expressed as mean ± standard deviation and independent t-test was used for comparison between groups. Statistics were made by SPSS software, 20th version (IBM Corp., Armonk, NY). RESULTS: The mean age, weight, body mass index and BFP of sarcopenic and non-sarcopenic women were: 40.75 ± 11 x 39.23 ± 8.92 years old (p=0.665), 102.93 ± 9.58 x 109.19 ± 14.25 Kg (p=0.237), 44.88 ± 2.7 x 42.24 ± 4.79 Kg/m² and 54.12 ± 1.11 x 51.44 ± 3.43% (p=0.052), respectively. Regarding the laboratory parameters of women with and without SARC: fasting blood glucose 89.25 ± 14.48 x 98.40 ± 27.48 mg/dL (p=0.359), HbA1c 5.83 ± 0.33 x 6.21 ± 1.18% (p=0.185), HOMA-IR 3.61 ± 1.28 x 5.31 ± 4.74 (p=0.160), TC 170.87 ± 39.36 x 180.82 ± 34.51 mg/dL, LDL 94.67 ± 26.63 x 105.60 ± 30.85 mg/dL, HDL 53.37 ± 18.50 x 50.84 ± 10.32 mg/dL, triglycerides 114.12 ± 38.84 x 127.30 ± 75.04 mg/dL and hs-CRP 8.51 ± 6.50 x 7.51 ±6.52 mg/L (p=0.792). CONCLUSION: Women with SARC and recommendation for BS when compared to women without SARC had similar anthropometric, metabolic and BFP parameters.