Aim: The aim of the study was to evaluate the anatomical and structural changes in the upper airway in cases of obstructive sleep apnoea using Videofluroscopy and to evaluate its efficacy.    Study design: Prospective analysis                                                Patients: 35 adults patients Patients who were diagnosed as cases of obstructive sleep apnea on the basis of nocturnal polysomnography and has not undergone any surgical operation for obstructive sleep apnea were included in study.                            Methodology:All patients were subjected to detailed history taking and clinical examination. Majority of the patients that is 28 (80%) in our study were males whose mean age was 49.1 years. There were 7 females (20%) whose mean age was 57.5 years. The mean age of the study population was 50.8 years.. The patients then underwent Videofluroscopy.                                                  Result: In our Study out of the 35 patients Videofluroscopy showed significant change in length of softpalate in inspiration  and  expiration amounting to collapse of Nasopharynx in all the patients (Mean % change is 12.55  and SD is 3.23 p< 0.001 ).

Conclusion:  Videofluruoscopy is very useful in studying the dynamics of upper airway and depicting the changes that occur during apneic events. It is 100 percent sensitive in detecting obstruction at Nasopharynx in apneic patients.