Free-hand tapping of the lateral ventricle through the posterior approach is a standard procedure. There are occasions, however, when more than one pass is needed. One way to make it easy and safe is to use a neuro-navigation approach. This requires extra setup. Therefore, the authors in this paper describe the use of a simple device to accurately place the catheter tip in the frontal horn. The device is rectangular with two open arms with co-linear free ends. Based on axial CT or MR images, a trajectory that travels within the ventricle from the posterior to the anterior horn is chosen. The anterior and posterior points of the trajectory are marked on the scalp. A burr hole is placed at the posterior point. The anterior free end is then attached to the anterior trajectory point on the scalp using an EKG pad and to the posterior to a plug placed in the burr hole. The ventricle is tapped through a central hole in the burr hole plug. All 12 patients had accurate catheter placement at the first attempt using this system. This is a simple device that used CT or MR images and surface markings to accurately tap the ventricle.

中文翻译：

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侧脑室后入路的立体定向导向器

通过后入路徒手敲击侧脑室是标准程序。但是，有时需要多次通过。使其变得简单和安全的一种方法是使用神经导航方法。这需要额外的设置。因此，本文作者描述了使用简单装置将导管尖端准确放置在额角中的方法。该装置是矩形的，带有两个自由端共线的开放臂。根据轴向 CT 或 MR 图像，选择从后角到前角在心室内行进的轨迹。轨迹的前点和后点标记在头皮上。在后点放置一个钻孔。然后使用心电图垫将前自由端连接到头皮上的前轨迹点，并连接到放置在钻孔中的塞子的后部。心室通过钻孔塞中的中心孔攻丝。所有 12 名患者在第一次尝试使用该系统时都已准确放置导管。这是一个简单的设备，它使用 CT 或 MR 图像和表面标记来准确地敲击心室。