Analysis of airway morphology and function before and after jaw movement using computational fluid dynamics

为探讨下颌后缩术后气道形态与气道压力降的关系，应用计算流体力学方法，对10例下颌前突患者进行下颌后缩术，并根据术前和术后的CT数据建立气道三维模型。在PAS中计算压降。在吸入空气流速（200 ml/s）下进行气道流动模拟。在所有病例中，下颌后移术后PAS的压降均增加，并与软腭水平的最小横截面积有高度相关性。当横截面积小于1 cm 2时，PAS中的压降趋于大大增加。

To investigate using computational fluid dynamic the relationship between morphology and pressure drop in PAS caused by mandibular setback surgery, each three-dimensional airway model was constructed from the preoperative and the postoperative CT data of 10 patients with mandibular protrusion who underwent mandibular setback surgery. The pressure drop was calculated in PAS. Flow simulation of airway was performed at the inspired air flow rate (200ml/s). In all cases, the pressure drop in PAS increased after mandibular setback surgery and has the high correlational relationship with the minimum cross sectional area at soft palatal level. When the cross sectional area was less than 1 cm2, the pressure drop in PAS tends to increase greatly.