Continuous infusion of propofol after ketamine-midazolam premedication in cats

Estudaram-se os efeitos anestésicos e cardiorrespiratórios produzidos pela infusão contínua de propofol em gatos pré-medicados com a associação cetamina-midazolam. Catorze gatos adultos foram igualmente distribuídos em dois grupos (TX1 e TX3) aos quais administraram-se, pela via intramuscular, cetamina (3,0mg/kg) e midazolam (0,3mg/kg). Decorridos cinco minutos procedeu-se a indução anestésica pela administração intravenosa de propofol (5,0mg/kg), imediatamente seguida pela infusão contínua do agente hipnótico nas doses de 0,1 ou 0,3mg/kg/min, aos animais de TX1 e TX3, respectivamente. Foram mensuradas as freqüências cardíaca e respiratória, temperatura retal, saturação de oxihemoglobina, concentração exalada de dióxido de carbono e pressão arterial. Em TX3 observou-se manutenção de adequado plano anestésico, enquanto que os animais do TX1 apresentaram-se sedados. Houve decréscimo acentuado da freqüência cardíaca, pressão arterial e elevação da concentração de dióxido de carbono exalado no TX3. Conclui-se que o emprego de propofol na dose de infusão de 0,3mg/kg/min em gatos pré-medicados com cetamina-midazolam produz anestesia satisfatória, bradicardia, depressão da função respiratória e pressão arterial.Anesthetic and cardiorespiratory effects of two different infusion rates of propofol were studied in cats premedicated with ketamine-midazolam. Fourteen cats were assigned to one of the two groups (TX1 or TX3). Ketamine (3.0mg/kg) and midazolam (0.3mg/kg) were administered intramuscularly. After 5 minutes, anesthesia was induced by propofol (5.0mg/kg) and maintained by a continuous infusion of propofol (0.1 and 0.3mg/kg/min, TX1 and TX3, respectively). Heart and respiratory rate, rectal temperature, oxygen hemoglobin saturation, end-tidal carbon dioxide and arterial pressure were recorded. Adequate anesthesia was observed in TX3, while animals in TX1 were only lightly sedated. A greater decrease in heart rate, arterial pressure and elevation of end-tidal dioxide carbon was observed in TX3 compared to TX1. It was concluded that administration of propofol at infusion rate of 0.3mg/kg/min provides satisfatory anesthesia, but it results in bradycardia, depression of respiratory function and arterial pressure

DISTRIBUIÇÃO ESPACIAL DE FORMAÇÕES SUPERFICIAIS EM UM TRECHO DA BORDA OESTE DO PLANALTO DO ESPINHAÇO MERIDIONAL / MG

O mapeamento de detalhe das coberturas superficiais identificou dois tipos de distribuição, linear e zonal, dessas coberturas na bacia do Rio Pardo Pequeno, Planalto Meridional do Espinhaço / MG. Os resultados evidenciam que i) os estruturados eventos tectônicos regionais possuem influencia sobre a distribuição das coberturas lineares e ii) que as coberturas zonais são comandadas pelas diferenças frente ao intemperismo dos estratos litológicos que compõem a base desses materiais

Potential of slurry from intensive dairy cattle farms for paulownia and populus trees, as organic fertilizer: I. effect on production

Intensive dairy cattle breeding have a relevant social and economic impact in portugal, particularly in the northern region. This activity generates a high flow of livestock effluents (slurry), rich in important nutrients for plant growth, which can be introduced into forest production systems. These effluents can provide a good alternative to mineral fertilizers, not only from an economic perspective, but also from the point of view of soil fertility resilience. In the present study, the effect of increasing doses of slurry on tree growth was evaluated in clones of paulownia and populus, as they are genotypes that have a high efficiency in the mobilization of soil nutrients and in the capture of co2 from the atmosphere, as well as high biomass calorific value. To this end, a demonstration field was installed, where the trees were planted with the compasses of: 2.5 x 1.5 m and 2.5 x 0.75 m, respectively for paulownia and for populus. In the field, the following treatments were performed: t0 - no fertilization, either mineral or organic; t1 - amount of slurry equivalent to 85 kg of n ha-1; t2 - amount of slurry equivalent to 170 kg of n ha-1; t3 - amount of slurry equivalent to 340 kg of n ha-1, either with or without inoculation prior to transplantation, with mycorrhizal arbuscular fungi and plant growth-promoting bacteria. Results evidenced a positive effect of the slurry application, both in the diameter at breast height and in total stand height, showing its fertilizing potential which should later be assessed on the ability to constitute an alternative or, simply, a complement to mineral fertilizationinfo:eu-repo/semantics/publishedVersio