目的:建立模拟两种下鼻甲切除术式的计算机流体力学即CFD模型,分析其对鼻腔流体力学的影响。方法:建立单侧下鼻甲肥大鼻腔的CFD模型A,在此基础上模拟下鼻甲切除术分别建立B、C两种术后模型,运用流体分析软件Fluent6.3.26计算三种模型的鼻腔全流场数据。结果:B模型患侧鼻腔面积较原始模型平均面积增大0.36cm2,C模型增大0.89cm2;B模型患侧鼻腔的压降差(约8Pa)与原始模型相比无太大改变,C模型压降差明显降低(约3Pa)。B模型患侧鼻腔流量无明显增加,C模型总鼻道下方及下鼻道流量为80ml/s,约为原始模型的8倍。B模型在吸气相及呼气相气流流速及流动方式与原始模型无明显改变,C模型在鼻瓣区流速明显增加,达到1.04m/s,并且涡流的产生与正常鼻腔趋于一致。结论:模型C在恢复鼻腔的正常解剖形态及正常通气生理方面都明显优于模型B。在下鼻甲手术中,恢复鼻腔的正常解剖结构对于鼻腔疾病的治疗具有决定性的意义。 OBJECTIVE: To establish a computational fluid dynamics (CFD) model that simulates two kinds of inferior turbinate resections and analyze its influence on the fluid mechanics of nasal cavity. Methods: To establish CFD model A of unilateral inferior turbinate hypertrophy nasal cavity. On this basis, to simulate the inferior turbinate resection were established B and C postoperative model, the use of fluid analysis software Fluent6.3.26 calculate the three models of the nasal cavity full flow field data. Results: Compared with the original model, the area of ​​nasal cavity in model B increased by 0.36cm2 and the model C increased by 0.89cm2. The difference of pressure drop in nasal cavity of model B (about 8Pa) Pressure drop decreased significantly (about 3Pa). There was no significant increase in the nasal flow in the affected side of model B, and the total flow of the lower and middle nasal passages in model C was 80 ml / s, about 8 times that of the original model. The velocity and flow pattern of B model in the inspiratory and expiratory phases did not change significantly from that of the original model. The flow velocity of C model in the nasal valve area increased significantly to 1.04 m / s, and the eddy current tended to be consistent with the normal nasal cavity. Conclusion: Model C is better than Model B in restoring the normal anatomy of the nasal cavity and the normal ventilation physiology. In the inferior turbinate surgery, the restoration of normal anatomy of the nasal cavity for the treatment of nasal diseases is of decisive significance.