[Peculiarities of the application of a multi-angle endoscopy during surgical interventions on the ethmoidal and sphenoidal sinuses: the anatomical study].

This work was designed to carry out the postmortem evaluation of the potential of using a multi-angle endoscope for endonasal surgical interventions on the ethmoidal and sphenoidal sinuses. The study was performed on 5 fresh cadavers (10 sides). It was shown that the range of the angles and directions of view during dissection of ethmoidal sinuses is 10-50 degrees and 360 degrees respectively. The use of an Acclarent Cyclops endoscope made it possible to visualize all walls of the sphenoidal sinus through the enlarged aperture which confirms the higher effectiveness of this instrument compared with the traditional endoscopes having the fixed angle of view of 0, 30, 45, and 70 degrees. The disadvantages of the Acclarent Cyclops endoscope are its heavier weight and a somewhat poorer quality of the screen image of the operative field.