单侧下鼻甲肥大鼻腔气流流体力学分析  

A cormputational fluid dynamics study of inner flow through nasal cavity with unilateral hypertrophic inferior turbinate

作　　者：郭宇峰[1] 张宇宁[2] 陈广[3] 刘树红[2] 卢晓峰[3] 朱敏[3] 蔡昌枰[1] 陈学明[1] 

机构地区：[1]上海交通大学医学院附属瑞金医院耳鼻咽喉科,上海200025 [2]清华大学热能工程系清华大学水沙科学与水利水电工程国家重点实验室 [3]上海交通大学医学院附属第九人民医院口腔颌面外科上海市口腔医学重点实验室上海市口腔医学研究所

出　　处：《临床耳鼻咽喉头颈外科杂志》2009年第17期773-777,共5页Journal of Clinical Otorhinolaryngology Head And Neck Surgery

摘　　要：目的:建立单侧下鼻甲肥大鼻腔平静呼吸下的计算机流体力学(CFD)模型,观察肥大的下鼻甲对鼻腔解剖结构的影响,比较吸气和呼气状态下双侧鼻腔气流的流体动力学。方法:将单侧下鼻甲肥大性鼻腔志愿者的鼻部CT通过三维重建软件Simplant 10.0及ANSYS ICEM重建得到CFD模型,运用流体分析软件Fluent6.3.26计算获得双鼻总流量为200 ml/s时的鼻腔全流场数据。结果:①下鼻甲肥大侧鼻腔冠状位面积在下鼻甲区域小于正常侧,两者平均差异为1.62 cm2。②平静呼吸时下鼻甲肥大侧鼻腔压降主要产生于下鼻甲区域,占总压降的2/3;呼气及吸气时流量均约为50 ml,相当于正常侧鼻腔流量的1/3;吸气相时下鼻甲肥大侧鼻腔气流平均流速在鼻瓣区为0.57 m/s,小于正常侧的1.83 m/s;下鼻甲肥大侧鼻腔气流的涡流形成少于健侧。结论:肥大的下鼻甲改变了鼻腔正常解剖结构,影响了患侧鼻腔的气流流动状态,对患侧鼻腔的通气、温度调节及嗅觉功能造成影响。Objective.. To investigate the anatomical influence of the hypertrophic inferior turbinate on compu- tational fluid dynamics（CFD）model of unilateral hypertrophic inferior turbinate nasal cavity, and to analyze the bilateral detailed nasal airflow simulations under both inspiratory and expiratory phases in CFD model. Method： One male volunteer troubled with unilateral hypertrophic inferior turbinate accepted CT scan. CFD model was built by CT scans through Simplant 10.0 and ANSYS ICEM. Fluent 6.3.26 simulated the airflow of both nasal cavity in breathing rates 200 ml/s. Result ： （1） In infraturbinal region, the cross-section area （CSA） of the nasal cavity with hypertrophic inferior turbinate was smaller than that in healthy side and the average area difference between two sides was 1.62 cm^2. （2）In both inspiration and expiration phases, the hypertrophic infraturbinal produced a markable reduction in intranasal pressures drop along the full length of the infraturbinal region. The volumetric flow rate in the hypertrophic infraturbinal side was 50ml/s, which equalled to one third of that in healthy side; Mean airspeed in the anterior valve region was estimated to be 0.57 m/s at hypertrophic infraturbinal side and 1.83 m/s at healthy side during inspiration; More vortices happened in the hypertrophic infraturbinal side. Conclusion.. The unilateral hypertrophic infraturbinal change the nomal anatomy and influence the aerodynamic of nasal cavity, which is harmful to the functions of human nasal in ventilation, temperature accommodation and olfactory sensation.

关 键 词：计算机流体力学 下鼻甲肥大 三维重建 

分 类 号：R765[医药卫生—耳鼻咽喉科]