Which type of lipo allows the most fat to survive for BBL?

Hello BrittE92,

It’s a pleasure to answer your questions! Adipocytes (fat cells) harvested using VASER Liposuction are typically of high quality and are viable to reintroduce into the body. Results of fat harvesting reveals that VASER is the only method that is able to preserve the viability of fat cells offering nearly 80% cell survival rate. As long as the amplitude used is around 50% or less with the VASER mode, the viability of the fat harvested should be good. The pressure used to extract the fat is also minimal (around - 15mmHG) as opposed to the standard 25mmHg which might affect the viability of the fat cells harvested. VASER Liposuction uses a precise, minimally invasive liposuction technology that produces eye-catching results in just one procedure and provides many benefits versus traditional liposuction treatments. VASER Liposuction is clinically proven to cause up to 53% skin retraction. To be performed successfully, the Brazilian Butt Lift (BBL) requires a surgeon with highly developed skills based on experience and knowledge of the technique. Kind regards! Dr. De La Cruz.

Regardless of liposuction method the survival rate depends on a variety of factors such as cannula size, processing of the fat, straining, handling of the fat, depth of injection, etc. You can expect to lose about 30-40% of the injected fat cells over time- regardless of the type of liposuction used. At this time, there is no clear evidence to suggest one type of liposuction to be superior to another. With more research in this area, that may change over time.Best wishes,Dr.Bruno

I'm not sure anyone REALLY knows the answer to this.  All liposuction requires a hollow tube connected to suction to suck out the fat as the end maneuver.  The differences lie in before that step and the types of canulas and suction strength used to suck it out
Years ago, before the days of widespread fat grafting I invested in a VASER.  The company rep claimed at that time that the ultrasonic waves used to break up the fat prior to sucking it out "blew up" the fat cells and that the surgeon didn't even have to suck out the fat because it would reabsorb! Of course, they recommended that you still suck out the fat because your results would happen faster.  Years later, after I had stopped using VASER because of increased costs associated with it, I heard a VASER rep claim that the fat cell viability for grafting "just as good" as that obtained for traditional methods of fat harvesting.  Forgive me for being a little skeptical.  
I think the great unanswered questions about fat grafting are:
-Do methods of enhanced fat harvesting such as laser (Smart Lipo), ultrasound (VASER), water pulses (BodyJet Lipo), or osscilating canula tips (Microaire) affect the viability of the fat cells?
-Is it necessary to centrifuge or wash the fat or is gravity separation enough?
- Does the suction intensity affect the the fat cell viability?
-Do larger fat particles survive better or worse that smaller fat particles?
Studies are being done all the time but it is difficult to quantify the results.
Currently, I use Microaire power-assisted liposuction to harvest the fat.  I set the suction about half of the maximum intensity.  I let the fat separate by gravity. 
With Brazilian Butt lifts, I think it is much more important to find a surgeon who is up to date on the latest safety techniques to avoid potentially fatal fat embolism.