Postoperative effects of anesthesia and surgery on resting energy expenditure in horses as measured by indirect calorimetry

Antonio M. Cruz, Natalie Coté, Wayne N. McDonell, Raymond J. Geor, Brian A. Wilson, Gabrielle Monteith, Ronald H L Li

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

In this study, we aimed to define the effects of anesthesia and surgery on the resting energy expenditure of horses in experimental conditions. Six horses were used in a longitudinal study with 2 study periods: before and after anesthesia and surgery. Every horse underwent a standard 90-min ventral midline exploratory laparotomy. Oxygen uptake (V̇O2) and carbon dioxide output (V̇CO2) were measured, with the use of a closed-circuit spirometry system, on 5 consecutive days immediately before and after the surgery. In 3 consecutive 5-min periods each day, the expired air was collected in a Collins spirometer. Samples of the expired gas were drawn from the spirometer through a drying column into O2 and CO2 analyzers. Resting energy expenditure was calculated as [(V̇O2 STPD*3.94) + (V̇CO2 STPD*1.11)]*1.44. This study showed that anesthesia and ventral midline exploratory laparotomy in experimental conditions increase the postoperative caloric demand in horses by an average of 1.0 Mcal/d, which represents approximately a 10% increase (P = 0.03). Additional studies in critically ill horses after surgery are needed to determine their caloric needs and to optimize their nutritional management.

Original languageEnglish (US)
Pages (from-to)257-262
Number of pages6
JournalCanadian Journal of Veterinary Research
Volume70
Issue number4
StatePublished - Oct 1 2006
Externally publishedYes

ASJC Scopus subject areas

  • veterinary(all)

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