Original Research

The effects of adding epinephrine or xylazine to lidocaine solution for lumbosacral epidural analgesia in fat-tailed sheep

Maryam Rostami, Nasser Vesal
Journal of the South African Veterinary Association | Vol 83, No 1 | a1 | DOI: https://doi.org/10.4102/jsava.v83i1.1 | © 2012 Maryam Rostami, Nasser Vesal | This work is licensed under CC Attribution 4.0
Submitted: 13 January 2012 | Published: 02 March 2012

About the author(s)

Maryam Rostami, Department of Veterinary Clinical Sciences, Shiraz University, Iran, Islamic Republic of
Nasser Vesal, Department of Veterinary Clinical Sciences, Shiraz University, Iran, Islamic Republic of

Abstract

This blinded, randomised experimental study was designed to compare the analgesic effects of lumbosacral epidural administration of lidocaine-epinephrine or lidocaine-xylazine combinations in fat-tailed sheep. Nine healthy fat-tailed male lambs (mean ± s.d. age, 4.6 ± 0.4 months; weight, 24.6 kg ± 2.5 kg) were randomly allocated into four groups of six sheep: lidocaine 2% (LID), lidocaine-epinephrine 5 µg/mL (LIDEP), lidocaine-xylazine 0.05 mg/kg (LIDXY) or bupivacaine 0.5% (BUP). The onset and duration of flank, perineum and hindlimb anaesthesia and the onset and duration of hindlimb paralysis were recorded. Epidural administration of LID, LIDEP, LIDXY or BUP produced anaesthesia within 6.6 min, 7.6 min, 3.4 min and 8.4 min, respectively. The mean onset of anaesthesia in the LIDXY group was significantly shorter compared with the BUP group (p = 0.02). The mean duration of anaesthesia was 107.9 min, 190.4 min, 147.6 min and 169.7 min for LID, LIDEP, LIDXY and BUP, respectively. The onset of hindlimb paralysis was faster in the LIDXY group than in the BUP group; however, the duration of hindlimb paralysis was shorter in LIDXY compared with LIDEP. Epidural administration of LIDEP or LIDXY provides a comparable duration of local anaesthesia without any adverse effects in fat-tailed sheep. Epidural LIDXY did not appear to be advantageous over epidural LIDEP.

Keywords

lidocaine, xylazine, epinephrine, epidural, sheep

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