Efficacy of Lidocaine in Dogs Undergoing Rhinoscopy

The objective of this randomized clinical trial was to evaluate and compare the efficacy of three different routes of lidocaine administration in dogs: 1) bilateral infraorbital nerve block (INB); 2) bilateral topical intranasal application (TIA); and 3) intravenous bolus (IVB). After premedication with medetomidine 0.01 mg kg-1 and methadone 0.2 mg kg-1 intramuscularly, anaesthesia was induced with propofol and maintained with isoflurane in oxygen. Dogs were randomly allocated to receive 2 mg kg-1 of 2% lidocaine as an INB via the caudal intraoral approach, via TIA or as an IVB. At 5 minutes following lidocaine administration, responses to rhinoscopy (RR) and ...

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