How far apart should SculpSure to the abs/flanks and Velashape 3 to the front and back of thighs be separated to be done safely?

Thank you for your question. Each treated area (i.e. abdomen or flanks) takes only 25 minutes per treatment. SculpSure is revolutionary for its non-surgical, non-invasive, treatment process where patients can expect to see fat reduction in treated areas in aobut 6-12 weeks after just one treatment. I suggest that you move forward and consult with a board certified facial plastic surgeon.
Best wishes,

Since the areas of the abdomen and flanks that you had treated with SculpSure are different than the thighs that you are going to have treated with Velashape, I think you could space them apart at any time you wished.  They could potentially even be treated the same day.  One treatment should not affect the other.    

Consult with you surgeon or technician. Some surgeons will perform both on the same day. You just want to make sure that you was it 6 weeks between treatments. Best of luck.

Since the regions being treated with SculpSure and Velashape are different, I see no conflict in doing the two different procedures as close together as you would like.  Regarding the Velashape spacing between treatments, I would favor following the clinic's recommendations as they apparently have had the best results with those spacing parameters.

We do many sculpsure treatments with our skin tightening device that is also used for cellulite. We will often do a sculpsure treatment and tightening in the same session. The intervals on the body are 6 weeks apart. I hope this helps you to schedule your treatments better. 

I use Endermologie which is similar to Velashape and also SculpSure and CoolSculpting.  I try to get the Endermologie treatments in as soon as possible, I believe it helps improve the results of the other procedures.Good Luck!

I am not aware of any studies that look for safety factors between the 2 types of treatments on different treatment areas.  Both procedures rely, to varying degrees, on the body's lymphatic system to produce the final results.  The lymphatic system can be overwhelmed and overstressed, which may impact the results (unfortunately, I am not aware of any studies on this topic).
My opinion, and out of an overabundance of caution, is to space the 2 different procedures by 4-6 weeks to minimize any risk of overwhelming your lymphatic system and/or risk on the results.