Functional Endoscopic Sinus Surgery
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Functional Endoscopic Sinus Surgery (FESS) is a surgical modality for some diseases of the nose and paranasal sinuses. It is a relatively recent surgical procedure that uses the help of nasal endoscopes (which make use of Hopkins rod lens telescopes): these are endoscopes which have diameters of 4mm and 2.7mm and come in varying angles of vision from 0 degrees to 30, 70, 90, and 120 degrees. These provide good illumination and can be introduced into the nose after anesthetising.
It has now become the main-stay in the surgical treatment of sinusitis and nasal polyposis including fungal sinusitis: this technique of functional endoscopic sinus surgery came into existence because of pioneering work of Messerkinger and Stamberger (Vienna, Austria.) Other surgeons have made additional contributions.
The surgical technique usually adopted is the MesserKlinger technique.