Epidurografia lombossacra com diferentes volumes de iohexol em felinos (Felix catus).

Abstract

Lumbosacral epidurography with different volumes of iohexol in felines (Felix catus). The objective of this work was determinate the cranial migration of different doses of iohexol, administrated by lumbosacral epidural route, analyzing the possible effects under some physiological variables, in felines. It was used 10 healthy mongrel felines, five males and five no pregnant females, with 1.0±0.5 years old and weighting 2.2±3.1 kg. The animals were sedated with xylazine (1 mg/kg, IM) and 15 minutes after, it was administrated iohexol in the dose of 0.22 mL/kg (G1) and of 0.3 mL/kg (G2), by the epidural route. Were analyzed: the cranial migration of the contrast, the consequent ataxia, the heart rate (HR), the P wave duration, the P-R interval, the QRS complex, the Q-T interval, the respiratory rate (f) and the body temperature (TºC). In the G1 the contrast migrated until the L2 vertebra (10.2±1.7 cm), lower values than the obtained in the G2 (L1 and 12.1±2.9 cm). There was no significant statistical variation for HR, P wave and QRS complex durations, P-R and Q-T intervals and f. The temperature decreased significantly in the G1 from the T40, and was smaller than the G2 at T60. It can be concluded that the dose of 0.3 mL/kg is potentially the most indicated to promote the anesthetic block of the ovarian pedicles in the felines, when using local anesthetics, and the iohexol do not modify the physiological parameters.