Incase of uncontrolled epistaxis,ligation of internal maxillary aery is to be done in the
Maxillary aery: Ligation of this aery is done in uncontrollable posterior epistaxis. Approach is Caldwell-Luc operation through pterygopalatine fossa Posterior wall of maxillary sinus is removed and the maxillary aery or its branches are blocked by applying clips. The procedure is now superceded by transnasal endoscopic sphenopalatine aery ligation. Ref: Dhingra 7e pg 201,469.
maxillary antrum
Pterygopalayine fossa
At the neck
Medual wall of orbit
Nose and paranasal sinuses