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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effects on indicators of tissue perfusion in dogs anesthetized with isoflurane at two multiples of the minimum alveolar concentration

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Author(s):
Floriano, Beatriz P. [1] ; Wagatsuma, Juliana T. ; Ferreira, Joana Z. ; Abimussi, Caio J. X. ; Menegheti, Thais M. ; Santos, Paulo S. P. ; Oliva, Valeria N. L. S.
Total Authors: 7
Affiliation:
[1] Sao Paulo State Univ, Postgrad Program Anim Sci, Fac Vet Med, BR-16072155 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: AMERICAN JOURNAL OF VETERINARY RESEARCH; v. 77, n. 1, p. 24-31, JAN 2016.
Web of Science Citations: 3
Abstract

OBJECTIVE To investigate the effects of isoflurane anesthesia administered at 2 multiples of the minimum alveolar concentration (MAC) on tissue perfusion in dogs. ANIMALS 8 healthy young adult Beagles. PROCEDURES A randomized crossover design was used. Dogs were anesthetized with isoflurane at 1.5 or 2.0 times the MAC for 2 hours, a 7-day washout period was provided, and dogs were reanesthetized with the alternate treatment. Various physiologic variables were monitored before anesthesia (baseline), at 20-minute intervals during anesthesia, and after anesthetic recovery. Variable values were compared between MAC multiples by means of repeated-measures ANOVA, with the Tukey test used for multiple comparisons. RESULTS During anesthesia, mean arterial blood pressure, cardiac output, and mixed venous oxygen saturation were significantly greater when isoflurane was administered at 1.5 versus 2.0 times the MAC. Cardiac output gradually increased during anesthesia at 1.5 times but not at 2.0 times the MAC. Arterial blood lactate concentration did not differ between MAC multiples at any point; however, this concentration decreased with increasing anesthetic duration at both MAC multiples. Oxygen delivery differed between MAC multiples, and oxygen consumption differed from baseline during anesthesia at 2.0 times the MAC. Oxygen extraction was higher at 2.0 versus 1.5 times the MAC. Heart rate differed between MAC multiples only after anesthetic recovery. CONCLUSIONS AND CLINICAL RELEVANCE Isoflurane anesthesia impaired tissue perfusion in dogs, but these changes would not be clinically relevant with oxygen delivery at 100%. Peripheral tissue perfusion was maintained or improved with time. (AU)

FAPESP's process: 11/05902-7 - Effects of different isoflurane concentratios on tissue perfusion in dogs
Grantee:Valéria Nobre Leal de Souza Oliva
Support Opportunities: Regular Research Grants