Intraocular pressure and its correlation with blood gas parameters in crested caracaras (Caracara plancus) anesthetized with isoflurane and sevoflurane

Abstract

Intraocular pressure and its correlation with blood gas parameters in crested caracaras(Caracara plancus) anesthetized with isoflurane and sevoflurane [Pressão intra-ocular ABSTRACTThe intraocular pressure (IOP) and its correlations with arterial carbon dioxide partial pressure (PaCO 2 ) and arterial pH were studied in five crested caracaras (Caracara plancus) anesthetized with isoflurane (ISO) and sevoflurane (SEV). Baseline IOP values were measured in both eyes (M0). Brachial artery was previously catheterized to obtain blood gas and cardiorespiratory analysis. Anesthesia was induced with 5% ISO and maintained with 2.5% for 40 minutes. IOP measurements and blood samples were evaluated in different moments until the end of the procedure. After recovering, a second anesthesia was induced with 6% SEV and maintained with 3.5%. Parameters were evaluated at the same time points of the previous procedure. IOP reduced significantly (P= 0.012) from M0 at all time points and no significative changes were observed between ISO and SEV anesthesias. Correlation between IOP and PaCO 2 and between PIO and blood pH were found only for SEV. IOP and blood pH decreased in parallel with IOP, whereas values of PaCO 2 increased in caracaras anesthetized with isoflurane and sevoflurane.Keywords: crested caracara, Caracara plancus, isoflurane, sevoflurane, intraocular pressure, blood gas RESUMO Avaliou-se a pressão intra-ocular (PIO) e estimaram-se as correlações entre PIO e pressão de dióxido de carbono (PaCO 2 ) e pH arterial de cinco caracarás (Caracara plancus), anestesiados com isofluorano (ISO) ou sevofluorano (SEV). Valores basais da PIO foram aferidos em ambos os olhos (M0

Intraocular pressure and pupil diameter in healthy cats anesthetized with isoflurane and pre-medicated with isolated acepromazine or in combination with tramadol

“…In crested caracaras (bird of prey), both isoflurane and sevoflurane significantly decreased the IOP, but differently from what has been reported in mammals, increased partial pressure of CO2 (assessed by hemogasometry) was negatively correlated with the IOP (Ribeiro et al, 2008). During general anesthesia with isoflurane, an average reduction of 2.85 and 2.06mmHg in the IOP was observed in AG and ATG, respectively.…”

“…It has been reported that all of the available inhalational general anesthetics lower IOP (Gross and Pablo, 2015). Although some species differences may be present, the reduction in IOP after inhalational general anesthetics may be substantial (Bolzan et al, 1998;Ribeiro et al, 2008). Regarding PD, such parameter may vary from marked dilatation to pinpoint with lighter levels of general anesthesia, to progressive mydriasis when inhalational anesthetics are used (Gelatt, 2011;Almeida et al, 2008).…”

Etograma do Carcará (Caracara Plancus, Miller, 1777) (Aves, Falconidae), em cativeiro

“…Vários autores (Dove & Banks, 1999;Franzo et al, 2009;Galetti & Guimarães Jr, 2004;Marini et al, 2007;Martinelli, 2010;Ribeiro et al, 2008;Tomazzoni, Pedó & Hartz, 2005;Travaini, Donázar, Ceballos & Hiraldo, 2001) Em cativeiro, o animal altera seu comportamento a fim de adaptar-se ao novo meio (Albuquerque, Silveira e Oliveira, 2009). O estudo de uma espécie confinada, que apresenta comportamentos naturais e alterados, visa auxiliar o manejo adequado para o bem-estar desse indivíduo (Albuquerque et al, 2009).…”