Comparison of two laparoscopic treatments for experimentally induced abdominal adhesions and evaluation of epidural anesthesia for laparoscopy in foals

Lansdowne, Jennifer L.
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University of Guelph

The overall goal of the studies in this thesis was to improve the surgical and anesthetic management of foals undergoing laparoscopic adhesiolysis [LA]. An investigation was carried out on over 30 foals to: (1) compare LA to LA combined with abdominal instillation [AI] of ferric hyaluronate gel [FHG] for treatment of abdominal adhesions (n = 12), (2) to determine the relationship between epidural cranial migration [ECM] and injectate volume [IV] of an isotonic dye solution [DS] in foal cadavers [FC] in lateral recumbency (n = 20), and (3) to assess dye migration and dermatome analgesia [DA] after epidural injection [EI] of a DS with or without 2% mepivicaine [MEP] in anesthetized foals under conditions of laparoscopy [ANFCL] (n = 8). AI of FHG after LA was found to be more effective than LA alone. ECM increased with increasing IV in FC. DA in ANFCL increased after EI of MEP, but did not extend as far cranially as indicated by the location of the DS on post-mortem. This study concludes that foals undergoing LA may benefit from AI of FHG and that when using an EI of local anesthetics, a volume greater than 0.2 ml/kg may be required to provide adequate anesthesia to perform laparoscopy in foals.

foals, laparoscopic adhesiolysis, abdominal instillation, ferric hyaluronate gel, abdominal adhesions, epidural cranial migration, injectate volume, isotonic dye solution, dye migration, dermatome analgesia, epidural injection, mepivicaine, laparoscopy