目的是评估术前模拟结果和术中图像融合指导在经颈静脉肝内门体分流术(TIPS)创建过程中的可行性和有效性。
本研究纳入了19例患者。骨骼的三维(3D)结构,肝脏,门静脉,下腔静脉,在Mimics软件中重建对比增强计算机断层扫描(CT)扫描区域的肝静脉。在3DMax软件中建立了虚拟Rosch-Uchida肝脏通路集和VIATORR支架模型。在Mimics和3DMax软件中模拟了肝静脉到门静脉的穿刺路径和支架的释放位置,分别。将仿真结果导出到Photoshop软件中,并将三维重建的肝膈顶部作为配准点,与术中透视图像的肝膈表面融合。将选定的门静脉系统融合图像叠加在参考显示屏上,以在操作过程中提供图像指导。作为一种控制,回顾性分析了连续19例常规透视引导下门静脉穿刺的病例,包括尝试穿刺的次数,穿刺时间,总手术时间,总透视时间,和总暴露剂量(剂量面积乘积)。
术前模拟时间平均约为61.26±6.98分钟。术中图像融合时间平均为6.05±1.13min。研究组(n=3)和对照组(n=3;P=0.175)之间的穿刺尝试中位数没有显着差异。研究组平均穿刺时间(17.74±12.78min)明显低于对照组(58.32±47.11min,P=0.002)。平均总透视时间研究组(26.63±12.84min)与对照组(40.00±23.44min;P=0.083)无显著差异。研究组平均总手术时间(79.74±37.39min)明显低于对照组(121.70±62.24min;P=0.019)。研究组的剂量面积乘积(220.60±128.4Gy。cm2)与对照组(228.5±137.3Gy。cm2;P=0.773)。无影像引导相关并发症。
利用术前模拟结果和术中图像融合指导门静脉穿刺是可行的,安全,并且在创建TIPS时有效。该方法价格便宜,可以改善门静脉穿刺,这对于缺乏具有CT血管造影功能的血管内超声和数字减影血管造影(DSA)设备的医院可能是有价值的。
The purpose is to evaluate the feasibility and efficacy of preoperative simulation results and intraoperative image fusion guidance during transjugular intrahepatic portosystemic shunt (TIPS) creation.
Nineteen patients were enrolled in the present
study. The three-dimensional (3D) structures of the bone, liver, portal vein, inferior vena cava, and hepatic vein in the contrast-enhanced computed tomography (CT) scanning area were reconstructed in the Mimics software. The virtual Rosch-Uchida liver access set and the VIATORR stent model were established in the 3D Max software. The puncture path from the hepatic vein to the portal vein and the release position of the stent were simulated in the Mimics and 3D Max software, respectively. The simulation results were exported to Photoshop software, and the 3D reconstructed top of the liver diaphragm was used as the registration point to fuse with the liver diaphragmatic surface of the intraoperative fluoroscopy image. The selected portal vein system fusion image was overlaid on the reference display screen to provide image guidance during the operation. As a control, the last 19 consecutive cases of portal vein puncture under the guidance of conventional fluoroscopy were analyzed retrospectively, including the number of puncture attempts, puncture time, total procedure time, total fluoroscopy time, and total exposure dose (dose area product).
The average time of preoperative simulation was about 61.26 ± 6.98 minutes. The average time of intraoperative image fusion was 6.05 ± 1.13 minutes. The median number of puncture attempts was not significantly different between the
study group (n = 3) and the control group (n = 3; P = 0.175). The mean puncture time in the
study group (17.74 ± 12.78 min) was significantly lower than that in the control group (58.32 ± 47.11 min; P = 0.002). The mean total fluoroscopy time was not significantly different between the
study group (26.63 ± 12.84 min) and the control group (40.00 ± 23.44 min; P = 0.083). The mean total procedure time was significantly lower in the
study group (79.74 ± 37.39 min) compared with the control group (121.70 ± 62.24 min; P = 0.019). The dose area product of the study group (220.60 ± 128.4 Gy. cm2) was not significantly different from that of the control group (228.5 ± 137.3 Gy. cm2; P = 0.773). There were no image guidance-related complications.
The use of preoperative simulation results and intraoperative image fusion to guide a portal vein puncture is feasible, safe, and effective when creating a TIPS. The method is cheap and may improve portal vein puncture, which may be valuable for hospitals lacking intravascular ultrasound and digital subtraction angiography (DSA) equipment equipped with a CT-angiography function.