Evaluation of the isoflurane-sparing effects of a constant rate infusion of remifentanil undergoing mastectomy in dogs

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dc.contributor.authorBeier, Suzane Lilian
dc.contributor.authorDa Rosa, Ademir Cassiano
dc.contributor.authorMattoso, Cláudio Roberto Scabelo
dc.contributor.authorDe Moraes, Aury Nunes
dc.contributor.authorOleskovicz, Nilson
dc.contributor.authorKlein, Adriana Vieira [UNESP]
dc.contributor.authorDallabrida, Ademar Luiz
dc.contributor.institutionUniversidade Federal de Minas Gerais (UFMG)
dc.contributor.institutionUDESC
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T16:40:19Z
dc.date.available2018-12-11T16:40:19Z
dc.date.issued2015-09-01
dc.description.abstractThe aims of this study were to evaluate the effects of two constant rate infusions of remifentanil on end tidal isoflurane (ETiso) in dogs undergoing mastectomy surgery. Eighteen bitches, 12+2 years of age, weighing 15+5 Kg were randomized into 3 groups (n=6/group) and underwent unilateral mastectomy due to mammary neoplasia. All animals received the premedications of morphine (0.5 mg Kg-1) and acepromazine (0.03 mg Kg-1) by intramuscular route (IM). Propofol dose-effect was used for induction of anesthesia. The animals were intubated and connected to a circle breathing system, and IPPV (intermittent positive pressure ventilation) was used to maintain normocapnia with an oxygen flow rate of 2 L/min and FiO2 100%. Anesthesia was maintained with isoflurane and saline solution (control group [GCON], n=6) or intravenous infusion of remifentanil at a rate of 0.15 μg Kg-1min-1 (REMI 0.15 n=6) or 0.3 μg Kg-1min-1 (REMI 0.3 n=6). Cardiopulmonary variables and ETiso were monitored before and every 15 minutes after the start of surgery. The data were analyzed by ANOVA with multiple repetitions between moments and ANOVA followed by the Student Newman Keuls test (=0.05) for comparisons between groups. Heart rate was lower at all moments in the REMI 0.15 and REMI 0.3 groups than in the GCON, and heart rate was not significantly different between the two remifentanil infusion groups. Additionally, the arterial blood pressure values (SAP, MAP and DAP) were not different between all groups. Baseline values (before surgery) of ETiso were not different between the 3 groups. After the start of surgery, ETiso ranged from 1.37±0.3 to 1.05±0.19 in the control group; in the REMI 0.15 and REMI 0.3 groups, ETiso was 36.5% and 65.7% lower than in the control group (M15). Remifentanil infusion reduced ETiso in a dose-dependent manner in animals undergoing radical mastectomy without causing significant cardiopulmonary alterations.en
dc.description.affiliationDept de Clínica e Cirurgia Veterinárias Escola de Veterinária Universidade Federal de Minas Gerais UFMG
dc.description.affiliationDept de Medicina Veterinária Centro de Ciências Agroveterinárias Universidade do Estado de Santa Catarina UDESC
dc.description.affiliationMédico Veterinário Dept de Clínica e Cirurgia Veterinárias Escola de Veterinária UFMG
dc.description.affiliationMédica Veterinária Faculdade de Medicina Universidade Estadual Paulista UNESP
dc.description.affiliationUnespMédica Veterinária Faculdade de Medicina Universidade Estadual Paulista UNESP
dc.format.extent3139-3148
dc.identifierhttp://dx.doi.org/10.5433/1679-0359.2015v36n5p3139
dc.identifier.citationSemina:Ciencias Agrarias, v. 36, n. 5, p. 3139-3148, 2015.
dc.identifier.doi10.5433/1679-0359.2015v36n5p3139
dc.identifier.issn1679-0359
dc.identifier.issn1676-546X
dc.identifier.scopus2-s2.0-84950336131
dc.identifier.urihttp://hdl.handle.net/11449/168225
dc.language.isoeng
dc.relation.ispartofSemina:Ciencias Agrarias
dc.relation.ispartofsjr0,320
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectDogs
dc.subjectIsoflurane
dc.subjectMastectomy
dc.subjectRemifentanil
dc.titleEvaluation of the isoflurane-sparing effects of a constant rate infusion of remifentanil undergoing mastectomy in dogsen
dc.typeArtigo

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