ARAUJO, S. B.; http://lattes.cnpq.br/7333928115943316; ARAUJO, Sabrina Barros.
Resumo:
The objective of this study was to perform the ocular echobiometry and measure the Doppler
velocimetric indices of the ophthalmic external artery in agouti (Dasyprocta prymnolopha)
and collared peccaries (Tayassu tajacu). In addition, a case of cataract diagnosed with the aid
of ultrasound in an agouti was reported. The transpalpebral technique was used to perform the
ultrasound exams. The echobometry of the agoutis (Chapter I) obtained the values of anterior
chamber thickness (D1), crystalline thickness (D2), vitreous chamber thickness (D3) and axial
length. ocular bulb (D4), then the external ophthalmic artery flow was identified to obtain the
resistivity index (IR). The data obtained in the evaluations were submitted to statistical
analysis, adopting 5% of significance. Based on the methodology used, the following values
were obtained for the right and left ocular globe, respectively: D1 - 1.28 ± 0.3 mm and 1.22 ±
0.1 mm; D2 - 8.27 ± 0.9 mm and 8.11 ± 0.9 mm; D3 - 5.35 ± 0.48 mm and 5.30 ± 0.47 mm
and D4 - 12.7 ± 0.9 mm and 13 ± 0.68 mm. The mean IR values were 0.4305 ± 0.0390 and
0.4258 ± 0.0387 (right and left eye, respectively), characterizing a low resistance. For the
collared peccaries, the obtained values were (right and left eyeball, respectively): D1- 1.72 ±
0.29 mm and 1.76 ± 0.40 mm; D2 - 9.95 ± 1.08 mm and 10.6 ± 0.99 mm; D3 - 7.42 ± 0.93
mm and 7.45 ± 0.72 mm; and D4 - 17.6 ± 0.78 mm and 17.8 ± 0.59 mm. The IR values were
0.435 ± 0.02 and 0.448 ± 0.02. There was no statistical difference between the right and left
ocular globe in any of the parameters studied in the mentioned species previously. Ultrasound
examination in B mode was also used to characterize the ocular globe of an agouti, which
presented isolation, difficulty of ambulation and bilateral opacity in the ocular globe. During
the examination, it was possible to observe an increase in the bilateral intralenticular
echogenicity with posterior lens reinforcement, without additional alterations. Based on the
sonographic characteristics, it was possible to conclude that the animal presented bilateral
cataract, and the technique for the diagnosis adopted was efficient and reliable for the
diagnosis. The use of B-mode ultrasonography and color Doppler allowed the characterization
of the anatomical components of the eye, the measurement of ocular structures, the
characterization of the cataract and the hemodynamic study of the flow of the ophthalmic
artery in all animals, allowing a comparison between the antimeres. The data inferred here are
presumed normal and serve as a reference for the species studied, and can be applied in the
ophthalmologic routine, assisting in the staging of lesions, as well as serving as a reference to
establish appropriate therapeutic protocols.