The transversus abdominis plane (TAP) block is an innovative regional anesthetic technique using local anesthetic that is gaining popularity in the analgesic management of human patients undergoing abdominal surgery. Needle placement in the TAP block is within the facial plane between the internal oblique and transversus abdominis muscles and involves the abdominal and thoracic nerves. Successful blockade generally involves spinal nerves T10–L1 and may induce sensory blockade as far cranially as T7, thus producing analgesia for abdominal surgery. Human studies suggest that this regional anesthetic technique may provide postoperative analgesia of the abdominal wall for up to 48 hr. Because of the extent and duration of sensory blockade, this novel technique with bupivacaine was used on a Canadian lynx (Lynx canadensis), possibly providing 8–10 hr of intra- and postoperative analgesia concurrent to exploratory laparotomy for removal of a gastric foreign body.
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