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000822218.pdf: 975486 bytes, checksum: 1146f7dad4b306d6777d30a8eb6dd806 (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / Os objetivos do estudo foram avaliar a farmacocinética e os efeitos sedativos e comportamentais dos cloridratos de xilazina e de detomidina administrados pelas vias intravenosa (IV) e intramuscular (IM) em asininos nordestinos. Na fase I foram utilizadas 6, e na fase II 8 jumentas. A metodologia das Fases I e II foram semelhantes, exceto pelas análises farmacocinéticas da Fase II. Na fase I doses crescentes de xilazina (0,5, 1,0 e 1,5 mg/kg) e de detomidina (10, 20 e 30 μg/kg) pelas vias IV e IM, com o intuito da escolha das doses a serem utilizadas na fase II. Os efeitos sedativos e comportamentais foram avaliados na Fase I pela variação de altura da cabeça, grau de ataxia e respostas a estímulos sonoros, acompanhado do registro de variáveis cardiorrespiratórias. Na fase II foram colhidas amostras seriadas de sangue para análise das concentrações plasmáticas de xilazina e de detomidina pelas vias intravenosa e intramuscular nos momentos: imediatamente antes, e 1, 1,5, 2, 4, 6, 10, 15, 30, 60, 90, 180, 270, 360, 540 e 720 minutos após as administrações. As concentrações plasmáticas de xilazina e de detomidina foram determinadas por HPLC e espectrometria de massa. O teste de Tukey foi empregado na análise das variáveis quantitativas, e o teste de Wilcoxon para as variáveis não-paramétricas. Para a comparação das concentrações plasmáticas e variáveis farmacocinéticas entre vias de administração para o mesmo fármaco utilizou-se o teste t pareado (p < 0,05). A menor dose de xilazina pela via IM não promoveu sedação ou alterações cardiorrespiratórias em nenhum momento após a administração. Com as doses de 1,0 e 1,5 mg/kg houve redução de altura de cabeça a partir de 20 até 45 e 60 minutos respectivamente predominando ataxia de grau leve com ambas as doses. Com 10, 20 e 30 μg/kg de detomidina IM houve redução de altura de cabeça entre 30 e 60, 20 e 90 e até 90 minutos respectivamente ... / The objectives of this study were to evaluate the pharmacokinetics, behavioral and sedative effects of xylazine and detomidine hydrochlorides administered by intravenous (IV) and intramuscular (IM) routes in northwestern donkeys. Six donkeys were used in phase I and eight donkeys in phase II. The methods used in both phases (I e II) were similar, except by pharmacokinetical analysis in phase II. IN phase I crescent doses of xylazine (0.1, 1.0 and 1.5 mg/kg) and detomidine (10, 20 and 30 μg/kg) by IV and IM routes, with the objective for selection of doses to be used in phase II. The behavioral and sedative effects were evaluated in phase I by variations in head height, ataxia degree and responses to sound together with the cardiorrespiratory variables. In phase II were harvested blood samples for analysis of plasma concentration of xylazine by intravenous and intramuscular routes in moments: before, and 1, 1.5, 2, 4, 6, 10, 15, 30, 60, 90, 180, 270, 360, 540, 720 minutes after administration. The plasma concentration of xylazine and detomidine were determined by HPLC and mass spectrometry. The tukey test was used for parametric, and Wilcoxon test for non-parametric variables. For comparison of plasma concentration and pharmacokinetical variables between routes and for the same sedative were used the t paired test (P<0.05). The lowest dose of IM xylazine did not cause sedation or cardiorrespiratory changes at any time after administration. The doses of 1.0 and 1.5 mg/kg had head drop from 20 to 45 and 60 minutes respectively, with predominance of mild ataxia with both doses. With 10, 20 and 30 μg/kg of IM detomidine was reduced head height between 30 and 60, 20 and 90, and up to 90 minutes respectively with predominance of mild ataxia in 10 and 20 doses and between mild and moderate with 30 μg/kg. By intravenous route 10 μg/kg of detomidine caused mild to moderate ataxia and head drop until 45 minutes. Doses of 20 and 30 μg/kg ... / FAPESP: 12/00037-9
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.unesp.br:11449/123302 |
| Date | 27 August 2014 |
| Creators | Rosa, Ademir Cassiano da [UNESP] |
| Contributors | Universidade Estadual Paulista (UNESP), Aguiar, Antonio Jose de Araújo [UNESP], Beier, Suzane Lilian [UNESP] |
| Publisher | Universidade Estadual Paulista (UNESP) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | 117 f. |
| Source | Aleph, reponame:Repositório Institucional da UNESP, instname:Universidade Estadual Paulista, instacron:UNESP |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | -1, -1, -1 |
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