RESUMEN
BACKGROUND: Treatment of palmar hyperhidrosis with botulinum toxin (BTX) requires effective anesthesia, but previous methods have not provided enough pain relief or have resulted in a prolonged impaired hand function. OBJECTIVE: This is a study of bilateral forearm intravenous regional anesthesia using prilocaine for BTX treatment of palmar hyperhidrosis. METHODS: In all, 166 patients (100 female and 66 male) were treated bilaterally with intracutaneous BTX type A injections using intravenous regional anesthesia with prilocaine (5 mg/mL). In a subgroup of patients, forearm nerves were studied with neurophysiologic methods and blood concentrations of prilocaine were measured. Pain evaluation with a visual analog scale was accompanied with a questionnaire about the treatment. RESULTS: In all, 95% of the patients answering the questionnaire (response rate 89%) were satisfied with the anesthetic effect. No serious adverse events occurred. There was a fast recovery of motor function (in median 6 minutes) and sensory function (in median 20 minutes). No subclinical signs of sensory nerve damage were found. LIMITATIONS: Recall and reporting bias are potential sources of limitations in this study. CONCLUSION: Bilateral forearm intravenous regional anesthesia provides an effective and well-tolerated anesthesia during BTX treatment of palmar hyperhidrosis.