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目的 :为临床开展前颅底外科提供嗅凹区必要的影像解剖学资料。方法 :取 5 0具成人头颅标本 ,行鼻窦冠状位薄层CT扫描 ,重点观测筛顶与筛板的移行情况。结果 :观测到筛顶与筛板的移行形式有 2种类型 :一种是直接斜向筛板 ;一种是先形成一平台段 ,在近筛板时陡然下降 ,形成嗅凹。本组资料中筛顶板与筛板平移的占 46 % ;而形成嗅凹的占 5 4%。在形成嗅凹的资料中 ,前筛顶板与筛板之间形成的高度差的平均值为 8.8mm ,后筛顶板与筛板之间形成的高度差的平均值为 2 .8mm ,前后嗅凹深度之间经t检验相差非常显著 (P <0 .0 1)。结论 :了解嗅凹的形成对减少前颅底外科手术及内窥镜鼻窦手术并发症的发生具有十分重要的意义。
OBJECTIVE: To provide necessary imaging anatomy data for groaning anterior cranial floor surgery in clinic. Methods: Fifty adult skull specimens were taken and thin-slice CT scan of paranasal sinus was performed. The migration of the top of sieve and sieve plate was observed. Results: There are two types of transitions between the sieve top and the sieve plate. One is the oblique sieve plate. The other is to form a plateau first and then drop sharply near the sieve plate to form a sniff concave. In this set of data, 46% of the top of the screen and the frit pan are translated, while 54% of the sniffs are formed. In the formation of sniffing concave material, the difference between the height of the front sieve top plate and the sieve plate is 8.8mm, the average height difference between the top sieve plate and sieve plate is 2.8mm, The difference between the depths by t test was significant (P <0.01). Conclusion: Understanding the formation of olfactory recess is very important in reducing the incidence of complications of anterior skull base surgery and endoscopic sinus surgery.