Short-Term Changes on Body Composition and Bone Mass After One-Anastomosis Gastric Bypass: a Prospective Observational S
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ORIGINAL CONTRIBUTIONS
Short-Term Changes on Body Composition and Bone Mass After One-Anastomosis Gastric Bypass: a Prospective Observational Study Artur Marc-Hernández 1 & Jaime Ruiz-Tovar 2 & Jose M. Jimenez 3 & Miguel A. Carbajo 4 & Maria Lopez 3 & Maria J. Cao 3 & Maria J. Castro 3
# Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Purpose Bariatric surgery generates a large weight loss. It is considered a successful surgery when 50% of the excess weight loss is reached. However, this measure does not include some variables that may have a direct impact on a patient’s health, such as fatfree mass (FFM) or bone mass. Therefore, the aim of this study is to evaluate body composition and bone mass in patients undergoing one-anastomosis gastric bypass (OAGB). Methods A prospective observational study was performed in patients undergoing OAGB. Body composition and bone mass were evaluated by bioelectrical impedance analysis at baseline (1 day prior to surgery), at 6 and 12 months after surgery. Results A total of 94 patients (67% females and 33% males) were included in the study. The excess BMI loss at 6 and 12 months after surgery was 97.9 ± 20.1% and 110.2 ± 30.5% respectively. The FFM showed a reduction of 6.6 ± 4.8 kg (p < 0.01) 6 months after surgery and of 7.9 ± 4.9 kg (p < 0.01) at 12 months, meaning a decrease of 10.5 ± 7.3% and a 12.9 ± 6.6% respectively. The bone mass decrease was 10.1 ± 6.9% (p < 0.01) and 12.9 ± 6.5% (p < 0.01) at 12 months after OAGB. Conclusions OAGB obtains a relevant weight loss in patients with morbid obesity, mainly, due to fat mass reductions. However, this procedure also provokes FFM and bone mass decreases, especially in females, but not significantly greater than other restrictive or mixed procedures. Keywords One-anastomosis gastric bypass . Body composition . Bioelectrical impedance . Fat-free mass . Fat mass . Bone mass
Introduction Bariatric surgery (BS) is an effective method to generate significant weight loss and remission of comorbidities in morbidly obese patients [1, 2], expecting increases in life expectancy of approximately 7 years [3]. Usually, the results obtained after BS are expressed by body mass index (BMI) and percentage of excess weight loss, considering that surgery has
* Jaime Ruiz-Tovar [email protected] 1
Laboratory of Training Analysis and Optimization, Sports Research Center, Miguel Hernández University, Alicante, Spain
2
Department of Health Sciences, Universidad Alfonso X, Villanueva de la Cañada, 28691 Madrid, Spain
3
Nursing Faculty, Universidad de Valladolid, Valladolid, Spain
4
Centre of Excellence for the Study and Treatment of Obesity and Diabetes, Valladolid, Spain
been successful when the patients lose 50% or more of their excess weight loss (EWL) and achieve a BMI below 35 kg/m2 [4]. However, in this criterion, only the total weight of the patient is analyzed, obviating other variables that may have a direct impact on the patients’ health, such as body composition. After surgery, most of the weight l
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