Use of bispectral index to monitor depth of anesthesia in isoflurane-anesthetized dogs

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dc.contributor.authorCampagnol, Daniela
dc.contributor.authorTeixeira Neto, Francisco José [UNESP]
dc.contributor.authorMonteiro, Eduardo R.
dc.contributor.authorBeier, Suzane L.
dc.contributor.authorAguiar, Antonio J. A.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:31:53Z
dc.date.available2014-05-20T13:31:53Z
dc.date.issued2007-12-01
dc.description.abstractObjective-To evaluate the correlation between the bispectral index (BIS) and end-tidal isoflurane (ETISO) concentration and compare the use of 3 BIS sensor positions in dogs.Animals-6 adult dogs.Procedures-Mechanically ventilated dogs received pancuronium, and depth of anesthesia was altered by increasing ETISO concentration from 1.5% to 2.3% and 3.0%. The BIS, suppression ratio (relative percentage of isoelectric electroencephalographic waveforms), and signal quality index (SQI) were recorded at each ET, so concentration for each of 3 BIS sensor positions (frontal-occipital, bifrontal, and frontal-temporal positions).Results-The BIS and ETISO concentration were poorly correlated-, regardless of sensor positioning, mean BIS values did not change significantly as ETISO was increased. At 3% isoflurane, regardless of sensor positioning, there was an increase in suppression ratio coincident with BIS < 40 in some dogs, whereas paradoxic increases in BIS (> 60) were recorded in others. Furthermore, at 3.0% isoflurane, the SQI was significantly lower for the bifrontal sensor position (compared with values for the other positions), but low SQI values prevented recording of BIS values from the frontal-occipital sensor position in 2 dogs. Overall, BIS values derived from the 3 sensor positions did not differ.Conclusions and Clinical Relevance-In dogs, BIS values may not reflect changes in depth of isoflurane anesthesia in the absence of noxious stimulation. of the 3 sensor positions, frontal-temporal positioning provided better correlation with changes in depth of anesthesia induced via changes in isoflurane concentrations. However, the sensor placements yielded similar results at SQI values > 50.en
dc.description.affiliationUniv Estadual Paulista, Fac Med Vet, Dept Vet Surg & Anesthesiol, Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Med Vet, Dept Vet Surg & Anesthesiol, Botucatu, SP, Brazil
dc.format.extent1300-1307
dc.identifierhttp://dx.doi.org/10.2460/ajvr.68.12.1300
dc.identifier.citationAmerican Journal of Veterinary Research. Schaumburg: Amer Veterinary Medical Assoc, v. 68, n. 12, p. 1300-1307, 2007.
dc.identifier.doi10.2460/ajvr.68.12.1300
dc.identifier.issn0002-9645
dc.identifier.urihttp://hdl.handle.net/11449/10862
dc.identifier.wosWOS:000251355200004
dc.language.isoeng
dc.publisherAmer Veterinary Medical Assoc
dc.relation.ispartofAmerican Journal of Veterinary Research
dc.relation.ispartofjcr0.833
dc.relation.ispartofsjr0,567
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleUse of bispectral index to monitor depth of anesthesia in isoflurane-anesthetized dogsen
dc.typeArtigo
dcterms.licensehttps://www.avma.org/News/Journals/Pages/journals-reprints.aspx
dcterms.rightsHolderAmer Veterinary Medical Assoc
unesp.author.lattes7162819131462797[5]
unesp.author.orcid0000-0001-6854-722X[5]
unesp.author.orcid0000-0002-3002-8093[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária e Zootecnia, Botucatupt

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