Local anesthesia for extracorporeal shock wave lithotripsy: A double-blind, prospective, randomized study

Objective: The efficacy of local anesthesia in decreasing intravenous analg esic requirements during extracorporeal shock wave lithotripsy with a secon d-generation lithotriptor was studied. Methods: Subcutaneous infiltration was performed before the procedure. Sixt y-nine patients (ASA I-II) were randomly allocated into four groups. Lidoca ine 1% plus epinephrine (5 mu g/ml) were infiltrated subcutaneously in a gr oup of patients with ureteral stones (group UL), and a group with renal sto nes (group RL), The same amount of saline was administered to a group of pa tients With ureteral stones (group UC), and a group with renal stones (grou p RC). Results: Patients with ureteral stones needed higher doses of intravenous a nalgesic. Neither patients with renal stones nor patients with ureteral sto nes administered local anesthetic required less intravenous analgesic than patients given placebo. Conclusion: Local anesthesia did not decrease the requirement of intravenou s doses of analgesics in patients treated with a second-generation lithotri ptor (Dornier MPL 9000). Copyright (C) 2000 S. Karger AG, Basel.