Tumescent liposuction (fluid injection) is the most common type of liposuction. It involves injecting a large amount of medicated solution into the areas before the fat is removed (sometimes, up to three times the volume of fat to be removed). The fluid is a mixture of local anesthetic (lidocaine), a drug that contracts the blood vessels (epinephrine), and an intravenous (IV) salt solution. The lidocaine in the mixture helps to numb the area during and after surgery, and may be the only anesthesia needed for the procedure. The epinephrine in the solution helps to reduce the loss of blood, reduce the amount of bruising, and reduce the amount of swelling that accompanies the surgery. The IV solution helps to remove the fat more easily and is suctioned out along with the fat. This type of liposuction generally takes longer than other types.
The super-wet technique is similar to the tumescent liposuction stated above. The difference is that not as much fluid is used during the surgery--the amount of fluid injected is equal to the amount of fat to be removed. This technique takes less time; however it often requires sedation via an IV, or general anesthesia.
Ultrasound-assisted liposuction (UAL) is a fairly new technique, used in the US since 1996. During this technique ultrasonic vibrations are used to liquefy fat cells. After the cells are liquefied, they can be vacuumed out. UAL can be done in two ways, external (above the surface of the skin with a special emitter) or internal (below the s