However, caution is advised if the alar base has been previously excised, if the alar base incisions extend more than 2 mm above the alar groove, and the lateral nasal artery is damaged bilaterally.

• 但是对那些在术前已做过鼻翼基底部切除，鼻翼基底切口在鼻翼沟上方超过2毫米和双侧外鼻动脉受损的病例仍要提出警告。