Objective: To study the efficacy of coblation in the endoscopic surgery of sinonasal and skull base masses. Study Design: Prospective Interventional Study. Method: 100 patients with signs and symptoms of nasal obstruction were enrolled for 14 months. On the basis of diagnosis they underwent endoscopic sinus surgery using coblator and their intra-operative blood loss, operation time, post-operative pain threshold using VAS(Visual analogue scale) were enlisted. Result: 80% had Sinonasal polyp followed by Inverted papilloma in 8%, Angiofibroma in 5%, Hemangioma in 3%, Esthesioneuroblastoma in 2% and Rhinosporidiosis in 2%. The Minimum blood loss was 50 ml and Maximum was 600 ml. 30% patients had no pain, 60% had Mild pain and 10% had Moderate pain post procedure. Mean Operation time was 112.86 min. Conclusion: Coblation has proven to have reduced operation time, blood loss and faster wound healing. It has now established itself as an essential tool for advance tumours in nasal surgeries. [ABSTRACT FROM AUTHOR]