Are Rhinoplasty & Liposuction safe if done at same time?

It is very common to combine various procedures.  The main determinants of whether it is advisable are total surgical time, type of anesthesia, changes of position to reach different areas, and the procedure mix with regard to possible infection risk.  Generally it is wise to avoid combining "clean" operations with very low risk of infection with potentially "contaminated" operations with a higher risk of infection.  In your case, the liposuction would be considered to be "clean" and the rhinoplasty would be "contaminated".  That being said, the risk is still quite low and depending on the extent of the liposuction (time), and re-positioning, the two procedures could possibly be combined as long as you understand the risks.  Please be sure that you get all of your questions answered so that you understand all of the risks of your surgery.

I personally would not do these together because among the worst things that can from liposuction is an infection that can rage down the tunnels in the fat which are filled with a great broth of serum to encourage bacterial growth.  The rhinoplasty can shower bacteria into the bloodstream and can infect the liposuction areas theoretically.  That's why I personally wouldn't even offer this to my patients.