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Obesity Surgery
Published in: Obesity Surgery 11/2008

01-11-2008 | Research Article

Effects of Roux-en-Y Gastric Bypass on Resting Energy Expenditure in Women

Authors: Marcelo de Castro Cesar, Maria Imaculada de Lima Montebelo, Irineu Rasera Jr, Adalberto Vicente de Oliveira Jr, Pamela Roberta Gomes Gonelli, Gabrielle Aparecida Cardoso

Published in: Obesity Surgery | Issue 11/2008

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Abstract

Background

Bariatric surgery is the gold standard treatment for morbid obesity, but little is known about its effects on resting energy expenditure.

Method

Twenty-one women underwent anthropometric and resting energy expenditure (REE) measurements before and 3 months after bariatric surgery using the Roux-en-Y gastric bypass (RYGBP) technique developed by Capella.

Results

The patients experienced a significant reduction in body weight, body mass index, waist circumference, and waist-to-hip ratio (WHR). The cardiopulmonary variables oxygen uptake, carbon dioxide output, non-protein respiratory quotient, and heart rate all decreased, whereas oxygen pulse did not change significantly. Absolute REE showed a significant reduction 3 months postoperatively (2006.7 ± 376.4 kcal/day to 1763.3 ± 310.5 kcal/day), but no significant difference was found compared with REE relative to body weight (0.71 ± 0.15 kcal kg−1h−1 to 0.75 ± 0.12 kcal kg−1 h−1) or as percent of Harris-Benedict predicted REE (106.2 ± 21.0% to 103.3 ± 15.1%).

Conclusion

In this study, bariatric surgery using the RYGBP technique (Capella) led to a significant decrease of body weight that decreased resting energy expenditure proportional to this weight loss, and to an increase in the utilization of fat as an energy substrate. It can be concluded that after 3 months, the Roux-en-Y gastric bypass surgery may provide significant metabolic benefits to morbidly obese women.
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Metadata
Title
Effects of Roux-en-Y Gastric Bypass on Resting Energy Expenditure in Women
Authors
Marcelo de Castro Cesar
Maria Imaculada de Lima Montebelo
Irineu Rasera Jr
Adalberto Vicente de Oliveira Jr
Pamela Roberta Gomes Gonelli
Gabrielle Aparecida Cardoso
Publication date
01-11-2008
Publisher
Springer-Verlag
Published in
Obesity Surgery / Issue 11/2008
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-008-9460-8

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