Efecto de la sedación con dexmedetomidina sobre la presión intraocular y el espesor central de la cornea en perros
Effects of the dexmedetomidine sedation on intraocular pressure and on the central cornea thickness in the dog

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Author
Cristóbal Gómez, L.
Martín Suárez, Eva M.
Molleda Carbonell, J.M.
Publisher
Veterinaria.orgDate
2009Subject
Corneal thicknessDexmedetomidine
Intraocular pressure
Tropicamide
Espesor corneal
Presión intraocular
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Show full item recordAbstract
Objetivo: Determinar el efecto de la sedación con dexmedetomidina
sobre la presión intraocular (PIO) y el espesor central de la córnea (ECC)
en perros
Material y métodos: Estudio realizado en 10 perros a los que se midió la
PIO y ECC basales y tras administración tópica de tropicamida 1%.
Seguidamente sedamos con dexmedetomidina 5μg/kg IV y valoramos PIO
y ECC a los 5,10, 15 y 20 minutos post-sedación. Los valores medios se
compararon mediante la prueba t de Student para muestras pareadas.
Resultados: Los valores medios basales de PIO fueron media ± D.E.
10,95 ± 1,70 mmHg; y 571 ± 21,42 μm para el ECC. No existe asociación
significativa entre PIO y ECC (r= -0,2399). La midriasis no varió
significativamente los valores de PIO (P= 0,3665) pero sí el ECC
(P=5,6109x10-6). La sedación con dexmedetomidina no varía
significativamente los valores de PIO ni ECC (P>0,05).
Conclusiones: La midriasis provocada por tropicamida 1% disminuye
significativamente el ECC pero no la PIO. La sedación con
dexmedetomidina 5 mg/kg IV no varía significativamente los valores
basales de PIO ni del ECC. Objective: to determine the effects of the dexmedetomidine sedation on
intraocular pressure (IOP) and on the central corneal thickness (CCT).
Material and methods: this study has been performed over 10 dogs
treated in the Veterinary Clinical Hospital of Córdoba University. The IOP and the CCT were measured before and after administration of one drop
of 1% tropicamide. Thereafter, they were sedated with dexmedetomidine
5 μg/kg IV, and IOP and CCT were evaluated at 5, 10, 15 and 20 minutes
after sedation. A t-Student test was performed with paired samples of
mean values in order to compare both groups.
Results: Basal values of IOP were 10.95 ± 1.70 mmHg, whereas CCT
mean values were 571 ± 21.42μm. There were no statistically significant
association between IOP and CCT (Pearson correlation r= -0.2399).
Mydriasis did not significantly change the values of IOP (P= 0.3665), but
did the CCT ones (P= 5.6109x10-6). No statistically significant differences
were found between the IOP nor the CCT values before and after sedation
with dexmedetomidine (P>0.05).
Conclusions: tropicamide-induced mydriasis does not affect IOP value,
but it causes a significant decrease of the CCT value. Sedation with 5
g/kg IV dexmedetomidine has not statistically significant effect on IOP
or CCT.