2023 article

Comparison of a blind and an ultrasound-guided technique for Retrobulbar anesthesia in dogs undergoing unilateral subconjunctival enucleation

Briley, J. D., Washington, D., Westermeyer, H. D., Posner, L. P., & Chiavaccini, L. (2023, April 6). VETERINARY OPHTHALMOLOGY.

By: J. Briley n , D. Washington *, H. Westermeyer n , L. Posner n & L. Chiavaccini*

author keywords: analgesia; enucleation; dogs; retrobulbar; ropivacaine; ultrasound-guided
TL;DR: The ultrasound-guided ST technique was more effective at decreasing intraoperative opioid requirements than the blind ITP approach in dogs undergoing unilateral enucleation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Source: Web Of Science
Added: April 17, 2023

AbstractObjectiveThis study compared the quality of retrobulbar anesthesia using a blind inferior‐temporal palpebral approach (ITP) with an ultrasound‐guided supratemporal (ST) technique in dogs undergoing unilateral enucleation.Animal studiedTwenty‐one client‐owned dogs were undergoing enucleation.ProceduresDogs were randomly assigned to receive ITP (n = 10) or ST (n = 11) with 0.5% ropivacaine at 0.1 mL/cm of neurocranial length. The anesthetist was blinded to the technique. Intraoperative data included cardiopulmonary variables, inhalant anesthetics requirement, and requirement for rescue analgesia (intravenous fentanyl 2.5 mcg/kg). Postoperative data included pain scores, sedation scores, and need for intravenous hydromorphone (0.05 mg/kg). Treatments were compared using Wilcoxon's rank sum test or Fisher's exact test as appropriate. Comparison of variables over time were tested using a mixed effect linear model on rank. Significance was set at p = 0.05.ResultsIntraoperative cardiopulmonary variables and inhalant requirements were not different between groups. Dogs receiving ITP required median (interquartile range, IQR) 1.25 (0, 2.5) mcg/kg intraoperative fentanyl while those receiving ST required none (p < 0.01). Intraoperative fentanyl was required in 5/10 and 0/11 of dogs in the ITP and ST groups, respectively (p = 0.01). Postoperative analgesia requirements were not significantly different between groups; 2/10 and 1/10 dogs in the ITP and ST groups, respectively. Sedation score negatively affected pain score (p < 0.01).ConclusionsThe ultrasound‐guided ST technique was more effective at decreasing intraoperative opioid requirements than the blind ITP approach in dogs undergoing unilateral enucleation.