What is the Real Purpose of Plastic Tubes Put in Nostrils Post Rhinoplasty?

There should be no chance of the nostrils actually closing after rhinoplasty.  Intra-nasal splints or tubes are designed to keep swollen areas in the nose from touching and possibly causing scar bands (synechiae).  They are also touted to keep blood from collecting in the septum after septoplasty.  However, there is controversy about whether they are really necessary or really prevent the things they are supposed to prevent.  Many doctors use them simply because that's the way they were trained and they have never changed.  The tubes almost always get blocked with blood and mucous and therefore don't really let you breathe very well. 

Sometimes internal nasal splints are used when septal work is performed.  It can help minimize scarring of soft tissue to each other.

Surgeons will debate the use of tubes following rhinoplasty, but I feel the main purpose is to keep the nostrils open during the immediate post-operrative healing process for patient comfort. I don't think it will have any effect on the final result.