One of the most common liposuction techniques is tumescent liposuction, which may get an assist from ultrasound or laser. It is performed on an outpatient basis.
During tumescent liposuction, a solution comprising saline solution, lidocaine (an anesthetic) and epinephrine (a blood-vessel contractor) is injected into the area being treated. The solution causes the targeted tissue to swell and become firm, which makes it easier to remove via the cannula. The advantages to this technique are that the anesthetic is built-in, so there is no need for general or IV sedation, and blood loss is minimized because the epinephrine constricts blood vessels.
In laser-assisted tumescent liposuction, a laser is used to liquefy the fat, which makes removing it easier. The laser can also be used to tighten treatment-area skin after fat is removed. Similarly, ultrasound-assisted liposuction uses ultrasound energy to liquefy fat.