Nguyen Christian, Robinson Taylor, Borgmann Anthony J, Baron Christopher, Imani Reza A
Vanderbilt University Medical Center, 1211 Medical Center Dr. Nashville, Tennessee 37232.
Radiol Case Rep. 2021 Jul 1;16(9):2376-2381. doi: 10.1016/j.radcr.2021.06.019. eCollection 2021 Sep.
The high technical success rate of transjugular intrahepatic portosystemic shunt (TIPS) placement makes the procedure a popular treatment option for symptomatic portal hypertension. Among the major drawbacks of the procedure - hepatic encephalopathy, acute hepatic failure, hemorrhage, biliary injury - TIPS dysfunction is one of the most prevalent, often requiring endovascular reintervention. Conventional techniques for shunt revision rely on transjugular access to the stent; but in technically difficult cases of abnormal angulation or severe stenosis, transhepatic access may also be required. The pull-through method utilizes both transjugular and transhepatic access to achieve stable through-and-through access in order to advance a sheath into the stent and recannulate the shunt. In the case of TIPS foreshortening, however, the distal end of the stent may abut the wall of the hepatic vein, jailing it off and obviating the advancement of a wire out of that end. We present here a case of a modified pull-through method for TIPS revision whereby a transhepatic wire is passed through the interstices of the stent at the distal end to enter into the hepatic vein and IVC. Subsequent snaring of the wire at the transjugular end establishes through-and-through access, and balloon dilation through the interstices allows for insertion of a transjugular sheath into the TIPS stent for recanalization. Our case highlights how the modified pull-through method, using trans-stent access, can be safely performed in patients with a foreshortened TIPS that abuts against the hepatic and portal vessel walls.
经颈静脉肝内门体分流术(TIPS)放置的高技术成功率使该手术成为有症状门静脉高压的常用治疗选择。在该手术的主要缺点——肝性脑病、急性肝衰竭、出血、胆系损伤——中,TIPS功能障碍是最常见的问题之一,常常需要进行血管腔内再次干预。传统的分流修正技术依赖经颈静脉进入支架;但在角度异常或严重狭窄等技术难度较大的病例中,可能还需要经肝穿刺进入。牵拉法利用经颈静脉和经肝穿刺进入,以实现稳定的贯穿进入,从而将鞘管推进支架并重新开通分流道。然而,在TIPS缩短的情况下,支架远端可能会抵住肝静脉壁,将其封堵,从而无法将导丝从该端穿出。我们在此介绍一例TIPS修正的改良牵拉法,即经肝导丝穿过支架远端的间隙进入肝静脉和下腔静脉。随后在经颈静脉端套住导丝以建立贯穿进入通道,通过间隙进行球囊扩张可将经颈静脉鞘管插入TIPS支架以进行再通。我们的病例突出了如何在TIPS缩短且抵住肝血管和门静脉壁的患者中安全地实施使用经支架进入的改良牵拉法。