Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Nagoya J Med Sci. 2022 May;84(2):477-483. doi: 10.18999/nagjms.84.2.477.
With the widespread use of three-dimensional printers, organ models created by these printers are now being used in the medical field for preoperative planning of surgeries. In this article, we report two cases in which embolization was expected to be difficult, and the three-dimensional printer-based vascular modeling was helpful in planning the surgery. The first case involved an aneurysm of the splenic artery. We attempted to embolize the aneurysm but were unable to advance the catheter into the distal artery and discontinued the procedure. The second case was a perianal varicose vein, which was initially treated with percutaneous transhepatic obliteration but was recanalized and required embolization. However, we expected difficulty in selecting the inferior mesenteric vein. In both cases, the vascular models were created using a 3D printer from the patients' computed tomography images. Preoperative planning, including treatment simulation, was based on these models. The time required to print a three-dimensional vascular model was approximately 12 hours at a cost of less than $10 each. Patient-specific vascular models using a three-dimensional printer can be a simple and inexpensive tool that can increase the success of embolization in difficult cases.
随着三维打印机的广泛应用，这些打印机所创建的器官模型现在正被应用于医学领域，用于手术的术前规划。在本文中，我们报告了两例预计栓塞困难的病例，基于三维打印机的血管建模有助于手术规划。第一例涉及脾动脉动脉瘤。我们试图栓塞动脉瘤，但无法将导管推进到远端动脉，因此终止了该手术。第二例是肛周静脉曲张，最初采用经皮经肝闭塞术治疗，但再次发生了再通，需要进行栓塞。然而，我们预计在下肠系膜静脉的选择上会有困难。在这两种情况下，血管模型都是使用患者的计算机断层扫描图像通过 3D 打印机创建的。术前规划，包括治疗模拟，都是基于这些模型进行的。打印一个三维血管模型大约需要 12 个小时，每个模型的成本不到 10 美元。使用三维打印机的患者特定的血管模型可以是一种简单且廉价的工具，可以提高困难情况下栓塞的成功率。
