Lidocaine intoxication in axillary block: similar pharmaceutical form, different concentration.

Local anesthetic intoxication is a medical emergency with high mortality. These drugs have not spesific antidotes, quick differential diagnosis and supportive treatment required in the case of exposure to toxic doses. We report the complications and anesthetic management of a patient who was scheduled for right carpal tunnel syndrome surgery under regional anesthesia, but mistakenly received injection of 140 mg procaine added to 10% 10 mL lidocaine (10 mL=1000mg) instead of 2% lidocaine (10mL=200 mg) as part of an axillary plexus blockade.