Influence Of Experimental Uncinate Process Excision On Airflow Characteristics Of Maxillary Sinus

Background:Nasal cavity is main passage between lung and outside air, any structure change of nasal cavity may cause sires of variation on airflow which pass away. It could further cause Rhinology disease. The in-depth study on nasal air flow will help further understanding of relation between structure and function of the nasal cavity. For a long time, many scholars did a lot of research work which confirmed its impact of Rhinology disease such infection, allergy factor, cilium drainage and other factors. But they still lacked sufficient knowledge on changes and influence in the nasal airflow which is different due to the operation on nasal structure.Objection: To discuss the nasal airflow mechanics change and its effects after and before uncinate process excision surgery.Methods: Choosing adult fresh cadaveric head as research object which must exclude anatomical abnormality. Punch the measurement hole A which is on the anterior wall of the maxillary sinus and view hole B which is on the Lateral wall of the maxillary sinus and anterior wall angle Department by electric drill. Connect pressure transmitter and airflow meter, air pump, suction in posterior nostrils then seal the compartment and the pore space. Measure and record the air pressure repeated before uncinate process excision, after uncinate process excision and maxillary sinus expansion of 10mm. Lit cigarettes placed in glass bottles and placed before the nostril of cadaveric head connected with the suction, use endoscopic system to observe the smoke dispersion conditions in sinus. Use high-speed camera to record smoke dispersion conditions on nasal septum surface.Results: The sinus cavity pressure is measured negative pressure relative to atmospheric pressure during inspiratory phase. The results show in decreasing order is before maxillary sinus expand group the highest then uncinate process reservation group and uncinate process excision group. During expiratory phase the sinus cavity pressure is measured positive pressure relative to atmospheric pressure. The results show in decreasing order is before maxillary sinus expand group the highest then uncinate process reservation group and uncinate process excision group. The results of pressure difference between expiratory phase and inspiratory phase show in decreasing order is before maxillary sinus expand group the highest then uncinate process reservation group and uncinate process excision group. Observed no smoke appeared inside the maxillary sinus in uncinate process reservation group and uncinate process excision group, smoke significantly increased inside the maxillary sinus in maxillary sinus expand group. Airflow pass nasal cavity in turbulent mode on low flow condition and in laminar flow mode on high flow condition.Conclusion: After FESS surgery airflow trace and flow rate in nasal cavity and OMC area has changed. Airflow exchange in maxillary sinus has significantly changed. The sinus cavity pressure is measured negative pressure relative to atmospheric pressure during inspiratory phase. The results show in decreasing order is before maxillary sinus expand group the highest then uncinate process reservation group and uncinate process excision group. During expiratory phase the sinus cavity pressure is measured positive pressure relative to atmospheric pressure. The results show in decreasing order is before maxillary sinus expand group the highest then uncinate process reservation group and uncinate process excision group. The results of pressure difference between expiratory phase and inspiratory phase show in decreasing order is before maxillary sinus expand group the highest then uncinate process reservation group and uncinate process excision group. Observed no smoke appeared inside the maxillary sinus in uncinate process reservation group and uncinate process excision group, smoke significantly increased inside the maxillary sinus in maxillary sinus expand group. It shows uncinate process could promote maxillary sinus air exchange. In theory view, retain or remodeling the uncinate process endoscopic surgery is more in line with the physiological state of the nasal cavity, the effect should be better than traditional uncinate process removal surgery.