Benha M. J. Vol. 18 No 3 Sept. 2001 RHINOMANOMETRIC ASSESSMENT OF NASAL AIRFLOW IN PATIENTS UNDERGOING FESS Hosam El-Din M. Abd El-Baky MD, Ahmed S. A. Elkady MD, Husam Eldin M. Abdul Azeem MD and Abou-Bakr E. Ras MD Department of Otorhinolaryngology, Benha Faculty of Medicine. Zagaziy University. Egypt Abstract Functional endoscopic sinus surgery (FESS) has become one of the most common surgical methods for treatment of chronic and recurrent si¬nusitis. To evaluate objectively the nasal airway patency of patients un¬dergoing FESS, 30 patients with rhinosinusitis and Nasal polyposis were selected from out-patient clinic of Benha university hospital in the period from July 2000 to February 2001. They were classified into two groups, the 1 st group "22 patients" had rhinosinusitis alone and the 2nd group "8 patients" had Nasal polyposis. They were evaluated pre operatively and 3 months post operatively by Active Anterior Rhinomanometry. It was found that. 1 st group showed subjective improvement in Nasal resistance to airflow after FESS but rhinomanometric studies showed no significant differences between pre and postoperative measures, while, the 2nd group showed both subjective and objective improvement i.e. less nasal resistance to airflow after FESS. which can be measured significantly by active anterior rhinomanometry and the difference between pre and post operative measures was clear.