Document Detail

Rehydration fluid temperature affects voluntary drinking in horses dehydrated by furosemide administration and endurance exercise.
MedLine Citation:
PMID:  14623154     Owner:  NLM     Status:  MEDLINE    
To determine whether temperature of rehydration fluid influences voluntary rehydration by horses, six 2-3-year-old horses were dehydrated (4-5% body weight loss) by a combination of furosemide administration and 30 km of treadmill exercise. For the initial 5 min following exercise, horses were offered a 0.9% NaCl solution at 10, 20, or 30 degrees C. Subsequently, after washing and cooling out, voluntary intake of water at 10, 20, or 30 degrees C from 20 to 60 min after exercise was measured. Fluid intake (FI) during the first 5 min of recovery was 9.8+/-2.5,12.3+/-2.1 and 9.7+/-2.0L (p>0.05) for saline at 10, 20, and 30 degrees C, respectively. Although not a significant finding, horses offered 0.9% NaCl at 20 degrees C tended to take fewer (p=0.07), longer drinks than when saline at either 10 or 30 degrees C was offered. Between 20 and 60 min of recovery, intake of water at 20 degrees C (7.7+/-0.8L) and 30 degrees C (6.6+/-1.2L) was greater (p<0.05) than that at 10 degrees C (4.9+/-0.5L). Thus, total FI was 14.7+/-2.5,19.9+/-2.5, and 16.3+/-2.4L for rehydration fluids at 10, 20, and 30 degrees C, respectively (p<0.05, value for 20 degrees C water greater than that for 10 degrees C water). Although the amount of metabolic heat transferred to the initial saline drink was correlated with the decrease in core temperature during the initial 5 min of recovery, heat transfer to ingested fluid was most likely responsible for the dissipation of, at most, 5% of the heat generated during endurance exercise. In conclusion, following exercise these dehydrated-normothermic horses voluntary drank the greatest amount of fluid at near ambient (20 degrees C) temperature. Although not determined in this study, greater satiation of thirst by oropharyngeal cooling may have contributed to lesser intake of colder (10 degrees C) fluid.
Prawit Butudom; Donna J Barnes; Matthew W Davis; Brian D Nielsen; Susan W Eberhart; Harold C Schott
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Veterinary journal (London, England : 1997)     Volume:  167     ISSN:  1090-0233     ISO Abbreviation:  Vet. J.     Publication Date:  2004 Jan 
Date Detail:
Created Date:  2003-11-19     Completed Date:  2004-02-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9706281     Medline TA:  Vet J     Country:  England    
Other Details:
Languages:  eng     Pagination:  72-80     Citation Subset:  IM    
Department of Large Animal Clinical Sciences, College of Veterinary Medicine, D-202 Veterinary Medical Center, Michigan State University, East Lansing, MI 48824-1314, USA.
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MeSH Terms
Dehydration / chemically induced,  therapy,  veterinary*
Diuretics / administration & dosage,  adverse effects
Drinking / physiology*
Fluid Therapy / methods,  veterinary*
Furosemide / administration & dosage,  adverse effects
Horse Diseases / chemically induced,  therapy*
Physical Conditioning, Animal / adverse effects,  physiology
Rehydration Solutions / chemistry*
Sodium Chloride / administration & dosage
Thirst / physiology
Reg. No./Substance:
0/Diuretics; 0/Rehydration Solutions; 54-31-9/Furosemide; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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