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In this setting, 5% lidocaine patches did not provide additional postoperative analgesia in dogs undergoing hemilaminectomy.

Multimodal analgesia is the foundation of opioid-sparing analgesia protocols in major surgery, being locoregional anaesthesia their keystone. Its aim is to provide adequate analgesia while minimising opioid requirements, and thus opioid-related adverse effects. The blossoming of ultrasound-guided fascial plane blocks offers a new spectrum of safer and simpler alternatives to traditional locoregional anaesthesia techniques. This report describes the anaesthetic management of a dog and a cat that underwent bilateral thoracotomy for treatment of chylothorax. The multimodal analgesia protocol consisted of preoperative methadone, ultrasound-guided serratus plane and erector spinae plane blocks, and epidural catheter for postoperative analgesia management. The combination of these techniques allowed for a reduction of perioperative opioid requirements, good-quality recovery and opioid-free analgesia in the postoperative period.

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