Effect Of DNS On Nasal Cavity

Objective:Deviation of nasal septum is a common morphology of nasal septum. Serious deviation of nasal septum can cause nasal congestion, nasal bleeding, headache and other symptoms, as well as nasal airflow changes. Long-term nasal septum curves can also cause abnormal structure of nasal cavity and paranasal sinuses. This study aimed to investigate the effects of DNS on the structure of nasal cavity using multislice spiral CT scanning. An retrospective analysis of long-term patients with nasal septum deviation of the nasal cavity and paranasal structure variation was taken by the observation of coronal and horizontal position of the image.Methods:The clinical data of 108 inpatient DNS cases and 129 no-DNS cases were collected. The transverse diameter of nasal cavity (a), transverse diameter of nasal cavity and paranasal sinus (b), hard palate alveolar angle (c, d), interalveolar distance (e) and maxillary rotation distance (f) were measured and compared respectively.Results:1. The ratio of a/b in experimental group (0.367±0.006) was significantly (P= 0.0023) less than that in control group (0.391±0.005).2. The interalveolar distance in DNS group (40.75mm) was significantly (P= 0.0002) increased compared with that in control (38.8 mm).3. The maxillary rotation distance (11.25 mm) in DNS group increased significantly (P< 0.0001) compared with that in control (10.1mm).For the angle between maxillary and palatal bone, there was no significant difference was found between DNS and control group for both right and left sides.Conclusions:The present study demonstrates that long-term DNS affects the development of nasal cavity and paranasal sinus, as well as increases the interalveolar distance and maxillary rotation distance. These influences may be caused by the alteration of airflow inside the nasal cavities.Objective:Chronic sinusitis is a chronic inflammation of the paranasal sinuses, which were closely related to ostiomeatal complex and nasal complex morphology and structure abnormality. Nasal septum deviation is a common morphological abnormality in the nasal cavity. Long-term deflection of nasal septum can influence nasal sinus drainage function. This study aims to investigate the correlation of nasal septum deviation and chronic sinusitis.Methods:The clinical data of 1398 patients came to our hospital with nasal dysfunction, nasal symptoms and nasal sinus CT examination was collected. The statistics of nasal septum deviation, non nasal septum deviation, nasal septum deviation complicated with chronic sinusitis, nasal septum deviation with chronic sinusitis, non nasal septum deviation with chronic sinusitis, non nasal septum deviation with chronic sinus, the narrow side of nasal septum deviation with chronic sinusitis, the wider side of nasal septum deviation with chronic sinusitis, nasal septum high deviation with chronic sinusitis and nasal septum non high deviation with chronic sinusitis were paired comparison test respectively.Results:1. In the recruited 1398 patients,834 with deviation of nasal septum,564 with non deviation of nasal septum.2. In nasal septum deviation group (834),461 patients accompanied with chronic sinusitis, accounts for 55.3%,373 patients not accompanied with chronic sinusitis, accounts for 44.7%. In non nasal septum deviation group (564),233 patients accompanied with chronic sinusitis, accounts for 41.3%,331 patients not accompanied with chronic sinusitis, accounts for 58.7%. There is statistical significant difference between the two groups (X2=26.2436, P<0.001).3. In nasal septum deviation (834 cases) with chronic sinusitis (461 cases) group, 103 sinusitis in the narrow side,89 sinusitis in the wide side,269 sinusitis bilateral. There is no statistical significant difference between the two groups (X2=0.4774, P=0.490).4. In nasal septum deviation group (834),439 patients with high deviation while 395 patients with non high deviation.253 out of 395 patients accompanied with chronic sinusitis in high deviation, accounts for 64.1%,142 patients without chronic sinusitis, which accounts for 35.9%.208 out of 439 patients accompanied with non high deviation with chronic sinusitis, accounts for 47.4%,231 patientsc without chronic sinusitis, accounts for 52.6%. There is statistical significant difference between the two groups (X2=23.3723, P< 0.001).478 patients in nasal septum deviation group (n=834) have deviation to the left side, accounts for 57.3%, while 356 patients have deviation to the right side, accounts for 42.7%. Anatomy abnormality rate in the wide nasal lateral:178 cases of hypertrophic uncinate process(21.3%),321 cases of middle turbinate hypertrophy(38.4%),307 cases of ethmoid bulla hypertrophy(36.8%),134 cases of middle turbinate anomalous curve(16.1%),587 cases of inferior turbinate hypertrophy(70.4%),27 cases of nasal septum mucosa hypertrophy(3.2%).Conclusions:The present study shows that long-term deflection of nasal septum can influence nasal sinus drainage and increase the incidence of chronic sinusitis. High deviation rather than non high deviation complicated with more chronic sinusitis. But the narrow side doesn’t have higher incidence of chronic sinusitis than the wider side.