Thank you for your question. It is always possible to have some degree of loose skin after liposuction just like after weight loss. Ultrasound or laser liposuction has very little effect on tightening the skin in all reality. Speak with your board certified plastic surgeon about your options and the likelihood of loose skin following your procedure.
There can be loose skin on the abdomen after CoolLipo. The point of using the laser with the liposculpture is to minimize that loose skin by heating up the dermis (second layer of skin) and stimulating collagen production to tighten the skin back up. This all depends on the quality of skin one had to start (ie: stretch marks, laxity, etc) and how much fat is taken out. Whoever assesses you can help give you a more realistic expectation.