With this technique, a saline solution containing a dilute amount of epinephrine (adrenaline) and Lidocaine (a local anesthetic) is preinjected into the area undergoing liposuction. This allows for greater ease of fat removal during the procedure, as well the safer removal of larger volumes. Small areas can be done comfortably without anesthesia. Larger or multiple areas may require sedation or general anesthesia. 

More about Liposuction in the reference section

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