There are techniques were liposuction of the abdomen with abdominoplasty can be done safely with a minimal risk of necrosis.
These techniques are relatively newer ideas and the difference from a traditional abdominoplasty is that these newer techniques may have minimal undermining of the supra umbilical area of the abdomen. What cannot be done is to liposuction the same area that is undermined. If you do not undermine the flap than liposuction of the abdominal flap can be done safely.
There are some instances that I have used this technique in a patient I would be afraid to do a traditional abdominoplasty on because of the risk of necrosis. An obese patient is an example of a patient who this limited undermining technique may be a safer technique than traditional abdominoplasty.
If you look at my profile one of the patients who wrote a recommendation was actually a patient who had a limited undermining abdominoplasty with extensive liposuction of the abdomen.