目的 探讨戴戒术治疗下肢原发性深静脉瓣膜功能不全的疗效和手术经验。方法 35例(47条肢体)下肢原发性深静脉瓣膜功能不全采用GoreTex人造血管行戴戒术治疗，在股浅静脉最高位第一对瓣膜下缩小原静脉周径1/4～1/3。结果 术后随访6个月至2年半，所有患者症状和体征完全或基本消失，9条肢体慢性溃疡于手术后8周内愈合。结论 该手术简便、安全易掌握，疗效满意，为提高本手术效果，应做到： ①熟悉掌握本术式的技术要点； ②合理掌握手术适应证和手术时机。
ObjectiveTo analyze intrahepatic vascular structures, divide liver segment automatically, and carry out virtual anatomic hepatectomy for virtual liver surgery planning based on liver threedimensional images. MethodsThe branches of portal vein were labeled in the level of segment based on spiral CT scanning images by using the liver surgery planning system software Liv 1.0. Thus, the simulation of an anatomical resection could be carried out. ResultsAccording to the portal segment branches, each individual liver segment could be divided automatically. The three-dimensional liver model was reconstructed based on liver segments, and the margin of liver segments was displayed clearly. On that basis, the simulation of anatomical resection and the volumetric estimation could be performed. ConclusionsThe three-dimensional liver model with intrahepatic vessel is reconstructed clearly, automatic segmentation of liver segment, the simulation of anatomical resection, and volumetric estimation can be applied in succession. The planning can be accomplished with Liv 1.0 on personal computer by the user, which provides a software platform for clinical application of virtual liver techniques.