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Obesity Surgery
Published in: Obesity Surgery 9/2020

01-09-2020 | Bariatric Surgery | Original Contributions

Short-Term Changes on Body Composition and Bone Mass After One-Anastomosis Gastric Bypass: a Prospective Observational Study

Authors: Artur Marc-Hernández, Jaime Ruiz-Tovar, Jose M. Jimenez, Miguel A. Carbajo, Maria Lopez, Maria J. Cao, Maria J. Castro

Published in: Obesity Surgery | Issue 9/2020

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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 fat-free 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.
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Metadata
Title
Short-Term Changes on Body Composition and Bone Mass After One-Anastomosis Gastric Bypass: a Prospective Observational Study
Authors
Artur Marc-Hernández
Jaime Ruiz-Tovar
Jose M. Jimenez
Miguel A. Carbajo
Maria Lopez
Maria J. Cao
Maria J. Castro
Publication date
01-09-2020
Publisher
Springer US
Published in
Obesity Surgery / Issue 9/2020
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-020-04603-3

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