Liposuction is a surgical procedure and even though the incisions are tiny, the volume of tissue treated can be large. It can be done under local anesthesia but this requires injections. There are bandages and recovery time. Liposonix is completely noninvasive and does not require any injected anesthesia. There is a variable degree of discomfort during the procedure, but it is tolerable for most people. There is no significant recovery involved but it takes 4-12 weeks to see the final result.
Liposonix is non invasive and uses focused ultrasound and may have some discomfort but premedicating with analgesics, non steroidals and bioflavonoids like Swell-X reduces pain, discomfort and post procedural swelling. A physician with experience would adequately medicate you to reduce discomfort and pain during the Liposonix treatment. I do not believe that IV sedation or general anesthesia is needed for this procedure as I do it without those techniques.