Kim Jin Kook, Yoon Joo-Heon, Kim Chang Hoon, Nam Tae Wook, Shim Dae Bo, Shin Hyang Ae
Department of Otorhinolaryngology-Head and Neck Surgery, Konkuk University College of Medicine, Seoul, Korea.
Acta Otolaryngol. 2006 Mar;126(3):282-7. doi: 10.1080/00016480500361320.
Particle image velocimetry (PIV) permits investigation of the distribution and velocity of the airflow in the nasal cavity. During breathing, the main laminar flow stream passes through the middle meatus and turbulent flow can be detected under physiologic conditions.
Physical models or casts of the nasal cavity have been utilized in several studies in an effort to understand its aerodynamics. PIV is a new technique for measuring the aerodynamic properties of tubular structures. In this article we evaluate nasal airflow characteristics during physiologic breathing under normal conditions and the usefulness of PIV.
A nasal model cast obtained by a combination of rapid prototyping and solidification of clear silicone was connected to a pump which simulated the physiological pressure in the upper airway system. A glycerol-water mixture was used as the flow material. The airstream was marked with spherical polyvinyl particles, observed through solidified clear silicone and analyzed using PIV.
The main flow within the cavity, which was mostly laminar, passed through the middle meatus. Turbulence was clearly visible in the anteroinferior part of the middle turbinate. The flow rate was highest at the middle meatus during inspiration and expiration.
粒子图像测速技术（PIV）可用于研究鼻腔内气流的分布和速度。在呼吸过程中，主要的层流通过中鼻道，并且在生理条件下可检测到湍流。
鼻腔的物理模型或铸型已在多项研究中被用于了解其空气动力学特性。PIV是一种用于测量管状结构空气动力学特性的新技术。在本文中，我们评估了正常条件下生理呼吸过程中的鼻腔气流特征以及PIV的实用性。
通过快速成型和透明硅胶固化相结合获得的鼻腔模型铸型连接到一个模拟上呼吸道系统生理压力的泵上。使用甘油 - 水混合物作为流动材料。气流用球形聚乙烯颗粒标记，通过固化的透明硅胶进行观察，并使用PIV进行分析。
鼻腔内的主要气流大多为层流，通过中鼻道。在中鼻甲的前下部可见明显的湍流。吸气和呼气时，中鼻道的流速最高。
