Preoperative and postoperative resting energy expenditure of patients undergoing major abdominal operations.
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Date
2021
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Abstract
Background: Nutrition therapy plays a major role in the perioperative management of surgical patients. Understanding energy
metabolism and correctly establishing the adequate energy needs is a crucial step to provide optimal nutrition care. The aim
of this study was to assess the resting energy expenditure (REE) after major abdominal procedures and its associated factors.
Methods: This was a prospective observational study conducted at a single center. REEs of patients admitted for gastrointestinal
surgical procedures were measured by indirect calorimetry 24 hours prior to the procedure and reassessed at least once within the
fifth postoperative day. Substrate oxidation was calculated according to the Frayn equation. Nutrition status was evaluated using
subjective global assessment. Results: There were no significant changes in the REEs throughout the study period; however, there
was a decrease in the respiratory quotient during the postoperative period, as well as a decrease in carbohydrate oxidation and an
increase in lipid oxidation. Only 33.3% of the patients presented a postoperative increase in REE > 10%. Those patients presented
higher blood-monocyte levels. Conclusion: Postoperative REE is not increased in most of the patients. In patients who had increased
REE, associated factors included higher levels of monocytes.
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Keywords
Nutrition status, Indirect calorimetry, Major abdominal surgery
Citation
SILVA, T. A. da et al. Preoperative and postoperative resting energy expenditure of patients undergoing major abdominal operations. Journal of Parenteral and Enteral Nutrition, v. 45, n.1, p. 152-157, jan. 2021. Disponível em: <https://aspenjournals.onlinelibrary.wiley.com/doi/ftr/10.1002/jpen.1825>. Acesso em: 11 out. 2022.