There are many computer models that describe the airflow in various anatomical variants and the pathology of the nasal cavity and paranasal sinuses. The data that describe the Reynolds number and airflow velocity in the different section of the nasal cavity of the patients with cyst of the maxillary sinus are very different. The results of operation of the maxillary sinusotomy through the middle nasal airway are disjointed and contradictory. There is also a little information of aerodynamics in the odontogenic pathology of the maxillary sinus. The purpose of the study was to calculate airflow velocity in various sections of the nasal cavity, and air exchange in the maxillary sinus in patients with cysts of the maxillary sinus in the postoperative period after endonasal maxillary sinusotomy through the lower nasal airway. Material and methods. 43 patients with maxillary sinus cyst were examined. The cysts of the maxillary sinus through the lower nasal airway were removed; the intact structures of the middle nasal passage were remained. This work is carried out in close collaboration with dentists. In the vast majority of cases, the maxillary sinus cyst was the result of an inflammatory process in the upper jaw of odontogenic origin. At the time of the study, the oral cavity was sanitized. Patients with polypous rhinosinusitis, as well as with rhinogenic pathology of the nasal cavity and paranasal sinuses, who needed surgical correction of this pathology, were excluded from the study. Results and discussion. Computer tomography of nasal sinuses was performed for all patients. We also conducted calculation of air flow velocity at the airways of the nasal cavity, the calculation of the Reynolds number. To calculate the parameters of external respiration, all patients were examined for external respiration using a mask spirometer. Conclusion. In the postoperative period, the rate of air flow passing through the nasal cavity during inhalation and exhalation was the highest in the section of the nose valve and the entrance to the nose. In all the studied sections of the nasal cavity in patients in the postoperative period, the Reynolds number did not exceed 2000 both on inhalation and on exhalation. 90 percent of the air in the maxillary sinus was exchanged for an average of 214 respiratory cycles during surgery when removing a maxillary sinus cyst through the lower nasal airway in the postoperative period.
Keywords: maxillary sinus, airflow
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