Tumescent anesthesia is a technique for delivery of local anesthesia. It is designed to maximize safety by using pharmacokinetic principles to achieve extensive regional anesthesia of skin and subcutaneous tissue with a high dose but low risk of reaching toxic levels of drug in the blood. The subcutaneous infiltration of a large volume of very dilute lidocaine and epinephrine causes the targeted tissue to become swollen and firm, or tumescent, and permits procedures to be performed on patients without subjecting them to the inherent risks of local anesthesia and blood loss.
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Tumescent anesthesia Wikipedia(Text) CC BY-SA