Assessment of septal deviation effects on nasal air flow: A computational fluid dynamics model

Chen, Xiao Bing; Lee, Heow Pueh; Chong, Vincent; Wang, De Yun

doi:10.1002/lary.20585

Cited by 119 publications

(137 citation statements)

References 31 publications

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“…Similar results of flow partition were noted between the PIV method and CFD method. Rapid wall pressure drop and highly localized wall shear stress were noted in one of the patients with nasal obstruction in our study as like the result of other report [7]. The consistency of the result should be evaluated for more nasal cavity models.…”

Section: Wall Shear Stresssupporting

confidence: 72%

“…On the DSN, CFD simulation was used to investigate the aerodynamic change after virtual septoplasty and partial turbinectomy. [6] The aerodynamic effects of DSN was evaluated using CFD method and changed patterns of inspiratory airflow, wall shear stress and total negative pressure through the nasal cavity were reported for one patient with DSN [7]. With severe asymmetric nasal cavities due to DSN, some patients experience pain or discomfort but the others don't.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Study on the Airflows in Four Asymmetric Nasal Cavities Due to Deviated Nasal Septum

Kim

Park

et al. 2010

IFMBE Proceedings

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Abstract-Although the prevalence of the deviated nasal septum (DNS) is high, the number of asymptomatic person with DNS is higher than that of symptomatic patients. Most of the patients complain nasal discomfort in narrow side. Usually clinical laboratory tests are performed at each side separately; therefore it is very difficult to evaluate the both nasal cavities simultaneously. The purpose of this study is to evaluate the difference in aerodynamic parameters with presence of nasal symptoms, using PIV and CFD methods in asymmetric nasal cavities due to DSN. Aerodynamic parameters, such as velocity, flow rate in both nasal cavities, wall pressure and wall shear stress were evaluated in 2 symptomatic and 2 asymptomatic patients with DSN. Surface-rendered bilateral nasal cavity models were created from CT scans and used for making clear models for investigation with PIV method and for numeric method. Flow rates in both nasal cavities were different in symptomatic patients with PIV method and CFD method. High wall shear stress was noted at the narrow side of the symptomatic patients. These parameters can be used for the evaluation of the patients with nasal discomfort with CFD method.

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Section: Wall Shear Stresssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study on the Airflows in Four Asymmetric Nasal Cavities Due to Deviated Nasal Septum

Kim

Park

et al. 2010

IFMBE Proceedings

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“…The etiology of sinonasal papilloma is unknown and seems different from that of rhinosinusitis, which is mainly caused by drainage problems. Recent studies have demonstrated the effect of septal deviation on airflow using computational fluid dynamics (Chen et al 2009;Orlandi 2010). The concave side shows increased velocities and turbulence in the middle meatal area.…”

Section: Discussionmentioning

confidence: 99%

Association between Septal Deviation and Sinonasal Papilloma

Nomura

Ogawa

Sugawara

et al. 2013

Tohoku J. Exp. Med.

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Sinonasal papilloma is a common benign epithelial tumor of the sinonasal tract and accounts for 0.5% to 4% of all nasal tumors. The etiology of sinonasal papilloma remains unclear, although human papilloma virus has been proposed as a major risk factor. Other etiological factors, such as anatomical variations of the nasal cavity, may be related to the pathogenesis of sinonasal papilloma, because deviated nasal septum is seen in patients with chronic rhinosinusitis. We, therefore, investigated the involvement of deviated nasal septum in the development of sinonasal papilloma. Preoperative computed tomography or magnetic resonance imaging findings of 83 patients with sinonasal papilloma were evaluated retrospectively. The side of papilloma and the direction of septal deviation showed a significant correlation. Septum deviated to the intact side in 51 of 83 patients (61.4%) and to the affected side in 18 of 83 patients (21.7%). Straight or S-shaped septum was observed in 14 of 83 patients (16.9%). Even after excluding 27 patients who underwent revision surgery and 15 patients in whom the papilloma touched the concave portion of the nasal septum, the concave side of septal deviation was associated with the development of sinonasal papilloma (p = 0.040). The high incidence of sinonasal papilloma in the concave side may reflect the consequences of the traumatic effects caused by wall shear stress of the high-velocity airflow and the increased chance of inhaling viruses and pollutants. The present study supports the causative role of human papilloma virus and toxic chemicals in the occurrence of sinonasal papilloma.

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“…In contrast, there was no correlation in female patients ( p = 0.842). meatal area (Chen et al 2009). The traumatic effects of the wall shear stress caused by the high velocity of airflow in the concave side might result in the high incidence of maxillary fungus ball.…”

Section: Abnormalitymentioning

confidence: 99%

Septal Deviation Is Associated with Maxillary Sinus Fungus Ball in Male Patients

Oshima

Nomura

Sugawara

et al. 2014

Tohoku J. Exp. Med.

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Fungus is one of the causes of chronic rhinosinusitis. If the fungus occupies the sinus but does not invade the sinonasal mucosa, this is called sinus fungus ball. Any association between anatomical variations and fungus ball remains unclear. Sinus fungus ball is defined as non-invasive chronic fungal rhinosinusitis occurring in immunocompetent patients, and the maxillary sinus is the most commonly affected. The etiology of maxillary sinus fungus ball remains unclear. This study assessed the potential contribution of anatomical variations, such as deviated nasal septum, concha bullosa, and Haller cell to the development of fungus ball in the maxillary sinus. Concha bullosa and Haller cell are structural variations that narrow the nasal airflow passage and contribute to chronic rhinosinusitis. The involvement of these variations has been investigated in chronic sinusitis but not in sinus fungus ball. Preoperative computed tomography findings of 103 patients with maxillary sinus fungus ball were evaluated retrospectively. Septal deviation and Haller cell were not correlated with the side of maxillary sinus fungus ball. Concha bullosa was more common on the unaffected side (p = 0.099). When we analyzed males and females separately, maxillary sinus fungus ball was more common on the concave side of the deviated septum in only male patients (p = 0.006). The high incidence of maxillary fungus ball in the concave side may reflect the consequences of the traumatic effects caused by wall shear stress of the high-velocity airflow and the increased chance of inhaling fungus spores.

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Assessment of septal deviation effects on nasal air flow: A computational fluid dynamics model

Abstract: This CFD study provides detailed information of the aerodynamic effects of nasal septal deviation on nasal airflow patterns and their associated physiological functions.

Cited by 119 publications

References 31 publications

Experimental and Numerical Study on the Airflows in Four Asymmetric Nasal Cavities Due to Deviated Nasal Septum

Experimental and Numerical Study on the Airflows in Four Asymmetric Nasal Cavities Due to Deviated Nasal Septum

Association between Septal Deviation and Sinonasal Papilloma

Septal Deviation Is Associated with Maxillary Sinus Fungus Ball in Male Patients

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