The idea is to respect the blood supply to the skin of the nose. When an open rhinoplasty is performed few of the blood vessels supplying the nasal will be divided to access the deeper structures.
While the nostril excision procedure (weir's procedure) could be performed in the same time, I would still have to respect your surgeon's decision as he is trying to perform the safest procedure possible. The nostril procedure could be done later under local.
Hope that helps!



