Is a drainless tummy tuck as safe as a TT with a drain in?

There is generally a higher risk of seroma with drainless techniques, either TissuGlu or progressive tension sutures.   I have found patient selection critical when deciding whether or not to place a drain.   Patients who are at higher risk of seroma are patients with higher BMI, previous massive weight loss patients and patients with more aggressive liposuction at the time of the tummy tuck.   Most of those patients get drains in my practice.   I prefer to use drainless techniques otherwise.  I have found the TissuGlu drain free patients to be the happiest tummy tuck patients I have ever had.   No drains and surprisingly little pain.   It is my feeling the pain is improved from that the lack of flap mobility and possibly even something to do with a local anesthetic effect of the adhesive itself.  

Yes.  There is no difference in terms of safety.  The difference is basically whether or not you have to deal with the drains.  The operation may take a little longer if the surgeon is doing it as drainless, but that is not a safety concern in general. Best wishes.