Peer-reviewed veterinary case report
Peribulbar lidocaine injection helps eye muscle movement and pain
By Ahn, Jaesang et al.·Published in American journal of veterinary research·2013·Department of Veterinary Clinical Sciences, South Korea·View original on PubMed →
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Original publication title: Effects of peribulbar anesthesia (sub-Tenon injection of a local anesthetic) on akinesia of extraocular muscles, mydriasis, and intraoperative and postoperative analgesia in dogs undergoing phacoemulsification.
- Species:
- dog
Plain-English summary
A group of 14 Beagles undergoing eye surgery had a local anesthetic (lidocaine) injected near their eyes to help with muscle relaxation and pain control. The dogs that received the lidocaine had larger pupil dilation and required less general anesthesia during the procedure compared to those who received a saline solution. While the lidocaine helped during surgery, there was no significant difference in pain levels after the surgery between the two groups. This method of using lidocaine could be a good option for managing pain and ensuring a calm surgical environment during eye surgeries in dogs.
People also search for: dog eye surgery pain management · Beagle eye surgery anesthesia · lidocaine for dog surgery
Abstract
OBJECTIVE: To evaluate the effects of peribulbar anesthesia (sub-Tenon injection of lidocaine hydrochloride) on akinesia of extraocular muscles, mydriasis, and intraoperative and postoperative analgesia in dogs undergoing phacoemulsification. ANIMALS: 14 Beagles with ophthalmically normal eyes. PROCEDURES: A blinded randomized controlled trial was performed. Dogs were anesthetized and assigned to 2 treatments: concurrent sub-Tenon injection of 2% lidocaine hydrochloride solution (2 mL) and IV injection of saline (0.9% NaCl) solution (0.02 mL/kg; lidocaine group [n = 7]) or concurrent sub-Tenon injection of saline solution (2 mL) and IV injection of 0.2 mg of atracurium/kg (0.02 mL/kg; control group [7]). Pupils were dilated by topical application of a combined tropicamide and phenylephrine ophthalmic solution. Ten minutes after the injections, pupil diameter was measured and phacoemulsification was performed. End-tidal isoflurane concentration was used to evaluate intraoperative pain. Subjective pain scores were recorded during the postoperative period. RESULTS: Akinesia was induced and maintained throughout the surgery in all eyes. Mean ± SD pupil diameter was significantly greater in the lidocaine group (13.7 ± 0.7 mm) than in the control group (12.2 ± 0.8 mm). Isoflurane requirements were significantly lower in the lidocaine group than the control group. However, postoperative pain scores were not significantly different between the groups. CONCLUSIONS AND CLINICAL RELEVANCE: Sub-Tenon injection of lidocaine was an effective method for inducing akinesia of extraocular muscles, mydriasis, and intraoperative analgesia for phacoemulsification in dogs. Therefore, this could be another option for surgical field exposure and pain management during phacoemulsification in dogs.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/23879851/