Document Detail

Effects of diazepam, acepromazine, detomidine, and xylazine on thiamylal anesthesia in horses.
MedLine Citation:
PMID:  8226249     Owner:  NLM     Status:  MEDLINE    
The cardiorespiratory effects of thiamylal (10 mg/kg of body weight, IV) and the effects of preanesthetic medication with diazepam, acepromazine, detomidine, or xylazine administered prior to a thiamylal dosage of 6 mg/kg, IV, were evaluated in 6 adult horses. The quality of recovery from thiamylal anesthesia also was evaluated. Intravenous administration of thiamylal at a dosage of 10 mg/kg increased heart rate, systemic arterial, pulmonary artery, and central venous blood pressures, as well as cardiac output and arterial partial pressure of CO2 (PaCO2). The maximal rate of right ventricular pressure increase (RVdP/dtmax), respiratory rate, and arterial partial pressure of O2 (PaO2) decreased, whereas arterial pH and systemic vascular resistance remained unchanged. Preanesthetic medication with diazepam prior to IV administration of thiamylal (6 mg/kg) did not change the pattern of this response, but diazepam did increase heart rate, cardiac output, and respiratory rate during the recovery period. Administration of acepromazine (0.1 mg/kg, IV) prior to administration of thiamylal increased heart rate and decreased systemic arterial and central venous blood pressures and systemic vascular resistance. Detomidine (10 micrograms/kg, IV), administered prior to thiamylal, decreased heart rate, cardiac output, and respiratory rate, and increased right atrial blood pressure. Administration of xylazine (0.5 and 1.0 mg/kg, IV) prior to thiamylal induced effects qualitatively similar to detomidine. Thiamylal decreased RVdP/dtmax and PaO2 in horses that received diazepam, acepromazine, detomidine, or xylazine.(ABSTRACT TRUNCATED AT 250 WORDS)
W W Muir; D E Mason
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Veterinary Medical Association     Volume:  203     ISSN:  0003-1488     ISO Abbreviation:  J. Am. Vet. Med. Assoc.     Publication Date:  1993 Oct 
Date Detail:
Created Date:  1993-12-10     Completed Date:  1993-12-10     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7503067     Medline TA:  J Am Vet Med Assoc     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1031-8     Citation Subset:  IM    
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Ohio State University, Columbus 43210-1089.
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MeSH Terms
Anesthesia / veterinary
Hemodynamics / drug effects*
Horses / physiology*
Hypnotics and Sedatives
Preanesthetic Medication / veterinary*
Respiration / drug effects*
Reg. No./Substance:
0/Hypnotics and Sedatives; 0/Imidazoles; 439-14-5/Diazepam; 61-00-7/Acepromazine; 7361-61-7/Xylazine; 76631-46-4/detomidine; 77-27-0/Thiamylal

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

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