Parâmetros oftalmológicos e ecobiométricos em quatis (Nasua nasua) sob anestesia geral

Abstract

Coatis are omnivorous mammals belonging to the order Carnivora, with diurnal habits, which are distributed in several countries in South America, and in almost all regions of Brazil. Anatomophysiological evaluations through echobiometry and ophthalmological tests are important to carry out a complete evaluation of the eyeball. Establishing physiological reference values of this species for ophthalmological tests is essential for the diagnosis of ocular disorders. The present study carried out in the species Nasua nasua from captivity describes the ophthalmological parameters evaluated by means of the type 1 Schirmer tear test (STT), measurement of intraocular pressure (IOP) by rebound, evaluation of central corneal thickness (CCT) by ultrasonic pachymetry (UP), B-mode ultrasonography (US) and indirect ophthalmoscopy. The anterior chamber depth (AC), lens axial length (LL), vitreous chamber depth (VC) and bulb axial length (BL) of both eyes were evaluated by echobiometry. All procedures were performed with clinically healthy animals, from captivity in a Fauna Keep located in the municipality of Santa Maria and the Municipal Zoo of Cachoeira do Sul, in Rio Grande do Sul, contemplating a total of 12 coatis. After physical and chemical containment, ophthalmological tests and biometry were performed. As a result, mean values (mean ± standard deviation) were obtained for STT of 2.29 ± 0.85 mm/min, for rebound IOP of 8.22 ± 1.97 mmHg, for CCT of 324.29 ± 18 .01 µm, and for the echobiometric measurements the values found were 1.48 ± 0.08 mm for AC, 4.09 ± 0.09 mm for LL, 3.59 ± 0.18 mm for VC and 9.17 ± 0.18 mm for BL, with no statistically significant differences being found for the tests performed when comparing the right and left eyes and the sex of the animals. The retinas show a holangiotic and tapetal vascular pattern. The data obtained were submitted to statistical evaluation using the t test and ANOVA. The values found through ophthalmological evaluation and ocular ecobiometry in coatis serve as a physiological reference for the species.