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The study aimed to determine the continuous rate infusion of tramadol associated with peri- and postoperative analgesia for orthopedic surgeries in dogs, as well as cardiorespiratory and adverse effects. Thirty dogs aged 4.2±1.2 years and weighing 15.1±0.9kg were enrolled in the study, premedicated intramuscularly with acepromazine (0.04mg kg-1) and tramadol (2mg kg-1); anesthesia was induced with propofol and maintained with isoflurane in oxygen. Three infusion rates were compared, comprising three experimental groups: G2: 2.0mg kg-1 h-1; G2.5: 2.5mg kg-1 h-1; and G3: 3.0mg kg-1 h-1. Surgery was initiated 15 minutes following the start of tramadol infusion. During anesthesia, animals were monitored in predefined time points: immediately after tracheal intubation and start of inhalation anesthesia (T0); surgical incision (TSI); final suture (TFS) and end of tramadol infusion (TEI), which was maintained for at least 120 minutes and prolonged according to the duration of surgery. Postoperative analgesia was evaluated through an interval pain scoring scale and the Melbourne pain scale. The mean time of tramadol infusion was greater than 120 minutes in all groups and no differences were found among them (141±27 minutes in G2, 137±27 minutes in G2.5 and 137±30 minutes in G3). Perioperative analgesia was regarded as short and did not correlate with infusion rates. Tramadol infusion provided adequate analgesia with cardiorespiratory stability Analgesia was not dose-dependent, however, and residual postoperative effects were short-lasting, which warrants proper postoperative analgesia following tramadol infusion. Additional studies are required using higher infusion rates and standardized nociceptive stimulation in order to determine how doses influence tramadol analgesia and whe therthereis a limit to its effect in dogs. RESUMO Objetivou-se determinar a infusão de taxa contínua de tramadol associada à analgesia peri e pós-operatória para cirurgias ortopédicas em cães, além de efeitos cardiorrespiratórios e adversos. Foram utilizados 30 cães, com idade média de 4,2±1,2 anos e pesos médios de 15,1±0,9kg, pré-medicados por via intramuscular com acepromazina (0,04mg/kg) e tramadol (2mg/kg). A anestesia foi induzida com propofol e mantida com isoflurano em oxigênio. Foram comparadas três taxas de infusão, compreendendo três grupos experimentais: G2: 2,0mg/kg; G2,5: 2,5mg/kg1; e G3: 3,0mg/kg. A cirurgia começou 15 minutos após o início da infusão de tramadol. Durante a anestesia, os animais foram monitorados nos seguintes momentos: imediatamente após a intubação traqueal e o início da anestesia inalatória (T0); incisão cirúrgica (TSI); final de sutura (TFS) e final da infusão de tramadol (TEI), que foi mantida por, pelo menos, 120 minutos e prolongada de acordo com a duração da cirurgia. A analgesia pós-operatória foi avaliada por escalas de pontuação de dor, conforme a escala intervalar de avaliação de dor e a escala de contagem variável de avaliação de dor da Universidade de Melbourne, a cada uma hora. O tempo médio de infusão de tramadol foi maior que 120 minutos em todos os grupos, e não foram encontradas diferenças entre elas (141±27 minutos em G2, 137±27 minutos em G2,5 e 137±30 minutos em G3). A analgesia perioperatória foi adequada na maioria dos indivíduos e a pós-operatória foi considerada curta, não correlacionada àquelas com diferentes taxas de infusão. A infusão de tramadol nas taxas estudadas produziu analgesia adequada com estabilidade cardiorrespiratória. A analgesia não foi dose dependente, no entanto os efeitos residuais pós-operatórios foram considerados curtos, o que determina a necessidade de analgesia adequada após infusão contínua de tramadol. Estudos adicionais que utilizam taxas mais elevadas de infusão de tramadol e estimulação nociceptiva padrão são necessários para determinar em que medida as doses influenciam a analgesia de tramadol e se há um limite nos seus efeitos nos cães.

Made available in DSpace on 2018-12-11T17:14:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Objective To evaluate motor and sensory blockade of combining dexmedetomidine with ropivacaine, administered perineurally or systemically, for femoral and sciatic nerve blocks in conscious dogs. Study design Randomized, controlled, experimental study. Animals Seven healthy Beagle dogs, aged 3.3 ± 0.1 years and weighing 11.0 ± 2.4 kg. Methods Dogs were anesthetized with isoflurane on three separate occasions for unilateral femoral and sciatic nerve blocks and were administered the following treatments in random order: perineural ropivacaine 0.75% (0.1 mL kg–1) on each nerve and intramuscular (IM) saline (0.2 mL kg–1) (GCON); perineural dexmedetomidine (1 μg mL–1) and ropivacaine 0.75% (0.1 mL kg–1) on each nerve and IM saline (0.2 mL kg–1) (GDPN); and perineural ropivacaine 0.75% (0.1 mL kg–1) on each nerve and IM dexmedetomidine (1 μg mL–1, 0.2 mL kg–1) (GDIM). Nerve blocks were guided by ultrasound and electrical stimulation and dogs were allowed to recover from general anesthesia. Sensory blockade was evaluated by response to clamp pressure on the skin innervated by the saphenous/ femoral, common fibular and tibial nerves. Motor blockade was evaluated by observing the ability to walk and proprioception. Sensory and motor blockade were evaluated until their full recovery. Results No significant differences in onset time to motor and sensory blockade were observed among treatments. Duration of motor blockade was not significantly different among treatments; however, duration of tibial sensory blockade was longer in the GDPN than in the GDIM treatment. Conclusions and clinical relevance Although a longer duration of sensory blockade was observed with perineural dexmedetomidine, a significant increase compared with the control group was not established. Other concentrations should be investigated to verify if dexmedetomidine is a useful adjuvant to local anesthetics in peripheral nerve blocks in dogs. Department of Animal Clinic Surgery and Reproduction Faculty of Veterinary Medicine of Araçatuba (FMVA) São Paulo State University (UNESP) Department of Support Production and Animal Health Faculty of Veterinary Medicine of Araçatuba (FMVA) São Paulo State University (UNESP) Department of Animal Clinic Surgery and Reproduction Faculty of Veterinary Medicine of Araçatuba (FMVA) São Paulo State University (UNESP) Department of Support Production and Animal Health Faculty of Veterinary Medicine of Araçatuba (FMVA) São Paulo State University (UNESP) CAPES: 2014/10449-8 FAPESP: 2014/24043-0

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:55:28Z No. of bitstreams: 0 Made available in DSpace on 2013-08-22T18:55:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-04-01 Made available in DSpace on 2013-09-30T19:48:18Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-04-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:42:51Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:42:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2000-04-01 Com o objetivo de avaliar as alterações cardiocirculatórias resultantes da manutenção anestésica com sevofluorano, três grupos de 10 cães cada foram anestesiados por 60 minutos com fluxo diluente de 100% de oxigênio (grupo 1), de 50% de oxigênio e de óxido nitroso (grupo 2) ou 27% de oxigênio e 63% de óxido nitroso (grupo 3). A tranqüilização foi realizada com levomepromazina (0,5 mg/kg) e a indução com tiopental (12,5 mg/kg). A freqüência cardíaca apresentou elevação significativa após a indução (P

Made available in DSpace on 2022-04-28T19:56:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2001-01-01 Objective To evaluate the cardiopulmonary and clinical effects of three different infusion rates of propofol in dogs premedicated with methotrimeprazine. Study design Randomized experimental trial. Animals Ten healthy adult mixed-breed male and female dogs, weighing from 14 to 20kg. Methods Dogs were premedicated with methotrimeprazine [1mgkg−1 intravenously (IV)] followed by induction of anesthesia with 4.5mgkg−1 of propofol IV and maintenance with propofol for 60 minutes as follows: T1, 0.2mgkg−1 minute−1; T2, 0.3mgkg−1minute−1; and T3, 0.4mgkg−1minute−1. Heart rate (HR), respiratory rate (RR), mean arterial pressure (MAP), end-tidal CO2 (PETCO2), arterial hemoglobin O2 saturation, arterial blood gases, and pedal and cutaneous reflexes were measured before and 5, 10, 20, 30, 45 and 60minutes after the beginning of the propofol infusion. Statistical analysis was performed using an anova. Results Heart rate increased during anesthesia in all cases and arterial blood pressure decreased only in dogs in the T3 category. Respiratory depression was proportional to the infusion rate of propofol. Muscle relaxation was satisfactory, but analgesia was inadequate in the three treatments. Conclusions The infusion of 0.2–0.4mgkg−1minute−1 of propofol produced a dose-dependent respiratory depression. The presence of a pedal withdrawal reflex and marked cardiovascular responses to this noxious stimulus suggests that anesthesia may not be of sufficient depth for surgery to be carried out. Clinical relevance Although several studies have been performed using propofol in animals, few studies have investigated the cardiopulmonary and analgesic effects with different doses. The determination of an adequate propofol infusion rate is necessary for the routine use of this intravenous anesthetic for the maintenance of anesthesia during major surgical procedures in dogs. © 2017 Wiley. All rights reserved. Department of Clinical Sciences School of Veterinary Medicine São Paulo State University UNESP, Rua Clóvis Pestana, 793, Araçatuba, São Paulo, 16050–680 Department of Veterinary Surgery and Anesthesiology Faculty of Veterinary Medicine and Animal Science São Paulo State University – UNESP, Distrito Rubião Júnior, Botucatu, São Paulo, 18618–000 Department of Clinical Sciences School of Veterinary Medicine São Paulo State University UNESP, Rua Clóvis Pestana, 793, Araçatuba, São Paulo, 16050–680 Department of Veterinary Surgery and Anesthesiology Faculty of Veterinary Medicine and Animal Science São Paulo State University – UNESP, Distrito Rubião Júnior, Botucatu, São Paulo, 18618–000