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Obesity Surgery
Published in: Obesity Surgery 7/2017

Open Access 01-07-2017 | Original Contributions

Preserved Fat-Free Mass after Gastric Bypass and Duodenal Switch

Authors: Martin Skogar, Ulf Holmbäck, Jakob Hedberg, Ulf Risérus, Magnus Sundbom

Published in: Obesity Surgery | Issue 7/2017

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Abstract

Background

Concerns for the possibility of an excessive loss of fat-free mass (FFM) and resting metabolic rate (RMR) after bariatric surgery, such as Roux-en-Y gastric bypass (RYGB) and duodenal switch (BPD/DS), have been raised.

Objectives

This study aims to examine body composition and RMR in patients after RYGB and BPD/DS and in non-operated controls.

Methods

Body composition and RMR were studied with Bod Pod and indirect calorimetry in weight-stable RYGB (n = 15) and BPD/DS patients (n = 12) and compared with non-operated controls (n = 17). All patients were 30–55 years old and weight stable with BMI 28–35 kg/m2.

Results

FFM% was 58% (RYGB), 61% (BPD/DS), and 58% (controls). Body composition did not differ after RYGB and BPD/DS compared to controls, despite 27 and 40% total body weight loss, respectively. No difference in RMR or RMR/FFM was observed (1539, 1617, and 1490 kcal/24 h; and 28.9, 28.4, and 28.8 kcal/24 h/kg).

Conclusion

Weight-stable patients with BMI 28–35 kg/m2 after RYGB and BPD/DS have a body composition and RMR similar to that of non-operated individuals within the same BMI interval.
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Metadata
Title
Preserved Fat-Free Mass after Gastric Bypass and Duodenal Switch
Authors
Martin Skogar
Ulf Holmbäck
Jakob Hedberg
Ulf Risérus
Magnus Sundbom
Publication date
01-07-2017
Publisher
Springer US
Published in
Obesity Surgery / Issue 7/2017
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-016-2476-6

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