Abstract

To describe perioperative management, surgical procedure, and outcome in mares with third-degree perineal lacerations (TDPL) treated with a single-stage repair, the Utrecht repair method (URM). Retrospective study. Twenty mares with TDPL. Medical records of mares with TDPL reconstructed with a URM were reviewed for perioperative management; surgical outcome; and postoperative fertility, athletic performance, and complications. Mares ranged in age from 3.5 to 11 years. Long-term follow-up was available for 13 mares. Mean duration of follow-up was 9 years (median, 9.5; range, 2-215 months (17.9 years)). Standardized perioperative fasting and postoperative refeeding protocols were used. Only five mares received supportive gastric medication. Reconstruction of the rectovestibular shelf was successful in 18 of 20 mares. Two of 20 mares developed a small rectovestibular fistula after the initial repair, which was successfully repaired with a second surgery. Other postoperative complications were observed in 13 mares and consisted of mild postanesthetic myositis, facial nerve paralysis, esophageal obstruction, rectal obstipation, partial perineal dehiscence, and rectal or vestibular wind-sucking. Six of seven mares that were subsequently bred became pregnant. One mare was successfully used for embryo recovery, and five of six mares foaled without recurrence of a TDPL. Nine of 13 mares were used for riding at various levels. The alternative single-stage reconstruction for TDPL was successful in 18 of 20 mares after a single surgery. No major complications related directly to the technique were noted. The URM is a valid alternative surgical technique for repairing TDPL in mares.

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