ECHOBIOMETRIC PARAMETERS AND EVALUATION OF THE OPTIC NERVE IN Caiman latirostris BY B-MODE ULTRASONOGRAPHY
Alligator; eye; ultrasound; crocodilian; necropsy
The broad-snouted caiman (Caiman latirostris) is the crocodilian with the highest number of documented interactions in urban areas in Brazil; these frequent encounters with humans are often marked by conflicts that are harmful to the animals. Despite this, there are few reports on the ophthalmological and neurological consequences of the traumas generated by these and other conflicts. The present study investigates the application of B-mode ocular ultrasonography as a tool for evaluating the intraocular structures and optic nerve in alligators, correlating the measurements obtained by ultrasound examination with physical measurements of the animals and necropsy findings, aiming to establish reference intervals for the diameter of the optic nerve and echobiometry, as well as to compare which transducers are most suitable for each type of evaluation, contributing to the anatomical and functional knowledge of the species, in addition to reinforcing the potential of ultrasonography as a complementary diagnostic method in veterinary practice and in protocols for monitoring wild species. The mean DNO values varied between the methods and tended to be underestimated by ultrasound examinations in relation to necropsy. Significant differences were found between the two transducers, with the convex one being more sensitive for retrobulbar structures, and the linear one for more superficial structures and for echobiometry