CAJ | 학술논문

目的从流体力学的角度探讨钩突对正常鼻腔的气流走向、压力、流速、分布和对鼻窦气流交换的影响.方法在正常成人鼻窦CT扫描基础上,使用Fluent 6.1.22软件模拟出正常人鼻腔、鼻窦结构和切除钩突后的鼻腔、鼻窦结构,利用Navier-Stokes方程分别计算切除钩突前后左侧鼻腔-鼻窦的气流流速、压力、分布和迹线.结果 ①切除钩突前后,气流在鼻腔主要通道的压力和分布没有变化:总鼻道和中鼻道气流量分别占鼻腔气体总流量的50%和30%;②切除钩突前后,鼻腔气流速度均在总鼻道最快、中鼻道次之,气流最大速度出现在左鼻阈与下鼻甲前端之间的区域,而气流迹线变化不大;③切除钩突前,钩突附近区域吸气和呼气时的流速无差异;钩突被去除后,该区域的气流速度增加,且呼气相的速度明显比吸气相大;④切除钩突后,上颌窦内的气流量增加.结论从气流力学的角度认为,钩突结构主要影响钩突附近区域的气流速度和上颌窦的气流交换,而且这种影响与钩突的形态结构有关.
목적 종류체역학적각도탐토구돌대정상비강적기류주향、압력、류속、분포화대비두기류교환적영향.방법 재정상성인비두CT소묘기출상,사용Fluent 6.1.22연건모의출정상인비강、비두결구화절제구돌후적비강、비두결구,이용Navier-Stokes방정분별계산절제구돌전후좌측비강-비두적기류류속、압력、분포화적선.결과 ①절제구돌전후,기류재비강주요통도적압력화분포몰유변화:총비도화중비도기류량분별점비강기체총류량적50%화30%;②절제구돌전후,비강기류속도균재총비도최쾌、중비도차지,기류최대속도출현재좌비역여하비갑전단지간적구역,이기류적선변화불대;③절제구돌전,구돌부근구역흡기화호기시적류속무차이;구돌피거제후,해구역적기류속도증가,차호기상적속도명현비흡기상대;④절제구돌후,상합두내적기류량증가.결론 종기류역학적각도인위,구돌결구주요영향구돌부근구역적기류속도화상합두적기류교환,이차저충영향여구돌적형태결구유관.
Objective This study aimed to investigate the influence of uncinate process on air flow velocity, trace, distribution, air pressure, as well as the air flow exchange of nasal cavity and paranasal sinuses. Methods Fluent software was used to simulate two nasal cavity and paranasal sinus structures following CT scanning, one hod normal nasal cavity, the another had the nasal cavity with uncinate process removde. Air flow velocity, essure, distribution and trace lines were calculated and compared by avierStokes equation and numerically visualized between two odels. Results Air flow of two models in the ommon and middle meatus accounted for more than 50% and 30% of total nasal cavity flow. Flow velocity of two models were aximal in the common eatus, followed by the middle meatus. The maximal velocity xisted on the left nasal district between limen nasi and head of inferior turbinate. The flow traces of two medels were similar. In the normal model, the air flow velocity of the district around uncinate process was almost the same in inhale and exhale. In the model with the uncinate process removed, the air flow velocity of the district around uncinate process was faster, the air flow velocity in expiratory phase was quicker. Compared with the normal nasal cavity, there was more exchange of maxillary sinus in the model with cut uncinate process. Conclusions In the view of flow dynamics, the uncinate process effect sthe air flow velocity of the district around uncinate process and the exchange of maxillary sinus, the contribution of nasal flow is connected with the morphosis of the uncinate process.