L'associazione lidocaina-fentanyl nell’anestesia epidurale caudale per la chirurgia delle basse vie uro-genitali nella cavalla. Esperienze cliniche. Caudal epidural anaesthesia with lidocaine-fentanyl association for the surgery of the lower uro-genital tract in the mare. Clinical experience

Purpose of this study was to evaluate clinical effects and intraoperative and postoperative pain relief of caudal epidural administration of an association of lidocaine (0,15 mg/Kg) and fentanyl (0,50 μg/Kg) in the surgery of the lower uro-genital tract in mares. Onset time for anaesthesia was 13' ± 6'. Mean duration of analgesia was 154' ± 17'. No mare showed sign of excitation or sedation. No important variation were observed in the cardiac and pulmonary parameters and no mare showed urinary retention. Epidural administration of the association of lidocaine and fentanyl induced long-lasting perineal analgesia without cardiovascular effects. The association of fentanyl to lidocaine is safe, improves the quality and prolongs duration of analgesia, making surgery of the caudal regions of the horse easier.