摘要
单分支型主动脉覆膜支架及其传输系统是近年国内研发的新型支架系统,适用于锚定区不足的主动脉夹层,是累及左锁骨下动脉(LSA)主动脉夹层的新选择。笔者通过总结使用该支架系统行胸主动脉覆膜支架腔内隔绝术(TEVAR)治疗锚定区不足的急性Stanford B型的病例,评估其近期效果与安全性。
回顾性收集2019年4月—2020年1月,在云南省阜外心血管病医院血管外科采用Casto
8例患者中,男7例(87.5%),女1例(12.5%);中位年龄42(33~64)岁;BMI(25.5±3.8)kg/
对于Stanford B型主动脉夹层的治疗,胸主动脉腔内修复术(thoracic endovascular aortic repair,TEVAR)已成为治疗降主动脉夹层的首选术
TEVAR术中全腔内重建LSA方法有多种,如平行支架技术、开窗技术(原位或体外)及使用分支型支架
本研究为回顾性研究,选取2019年4月—2020年1月在我院接受微创Casto

图1 术前CTA显示夹层累及LSA开口,与左颈总动脉(LCCA)开口相距约1.8 cmTable 1 Preoperative CTA showing the dissection involving the opening of the LSA, at distance of 1.8 cm from the opening of the left common carotid artery (LCCA)
入院后常规控制患者血压120/70 mmHg(1 mmHg=0.133 kPa)以下,心率60~70次/min,绝对卧床,保持排便通畅,镇静止痛,发病7~10 d后行手术治疗。术前CTA或DSA检查,明确病变位置与LSA的关系,使用重建软件(syngo.via图像应用处理软件,德国西门子)测量锚定区与LSA开口距离,决定是否需要重建LSA及使用一体化分支型主动脉覆膜支架。手术过程:全麻,取右腹股沟切口,暴露右股动脉并套带,动脉鞘穿刺,泥鳅导丝配合猪尾导管从动脉鞘插入鞘管,选入主动脉真腔至升主动脉。Seldinger技术穿刺左肱动脉,泥鳅导丝配合椎动脉管选入LSA至升主动脉。高压枪造影证实真腔后,测量血管腔直径、破口位置及左椎动脉开口与LSA距离、内脏动脉等供血情况(

图2 术中影像 A:高压枪造影,证实真假腔;B:释放支架完毕后再次高压枪造影,第一破口被有效隔绝,无内漏产生
Figure 2 Intraoperative imaging data A: High pressure syringe angiography for identification of true and false lumen; B: High pressure syringe angiography after stent deployment showing the effective occlusion of the entry tear without endoleak
血管覆膜支架在8例患者中均成功植入,支架释放成功率100%。平均造影时间(47.5±10)min,造影剂使用(120±20)mL,术中平均失血量(43.4±16.8)mL,所有患者均无脑部并发症、无截瘫,无内漏,无左上肢肌无力(
术后复查CTA显示主体及分支覆膜支架形态良好,血流通畅。住院时间平均(14.8±3.7)d。1例轻度贫血,下地活动恢复食欲后贫血好转。3例术后体温升高,3 d后自行消退。2例腹痛,急行腹部立位平片检查,发现急性肠梗阻,结合术前CTA提示夹层累及肠系膜上动脉。予禁食、胃肠减压及补液对症治疗后好转,术后1周常规全主动脉CTA复查提示无肠梗阻后出院。1例术前因夹层累计左肾动脉导致急性肾功能不全,术后无明显改善,转综合医院治疗。所有病例术后随诊3~13个月,分支支架通畅,无偏瘫、脑梗等并发症(

图3 术后1年复查全主动脉CTA,无内漏,分支支架通畅
Figure 3 CTA of the whole aorta at 1 year after operation showing patent branch stents and absent of endoleak
针对持续疼痛、血压难控、内脏灌注不足及肢体缺血的复杂型急性Stanford B型主动脉夹层患者而言,接受手术治疗获益更高。传统的TEVAR手术受限于支架材料,要求足够长度的相对健康的血管锚定区,通常为15 mm,否则有逆撕或移位风
单分支型主动脉覆膜支架及输送系统是国内第一款用于完全腔内治疗累及LSA,伴第一破口与LSA距离<15 mm的分支型覆膜支架系统。设计理念在于主体与分支支架缝合,一次性导入并先后释放,其分支支架对重要分支动脉的保护,有效避免了分支动脉开口被移植物覆盖所带来的并发症,延长了锚定距离,由此解决了锚定区不足,分支支架移位或闭塞等难题。适应证为Z2~Z3区,甚至可扩展到Z1区。主动脉弓部病变一些回顾性研究表明,根据其合理和准确的释放方法,全腔内重建主动脉及LSA这种新方法,复合操作带来的优势包括减少I型内漏的发生率,而这种并发症在烟囱技术中较为常
胸主动脉覆膜支架修复主动脉夹层之后,由于假腔或远端破口依然存在,需要在随访期观察假腔血栓化及远端破口是否仍有活动性血流。因此,TEVAR术后一般不主动抗凝、抗血小板治疗。但随着小直径的分支支架一体化植入后,为保持其通畅,避免要保护的左椎动脉闭塞,抗血小板治疗成了必需。有学
网篮抓捕器抓捕分支支架导丝时,若主动脉夹层解剖复杂,甚至累及髂动脉,可考虑抓捕器至升主动脉抓捕,有效规避导丝入假腔风险。该单分支型主动脉覆膜支架及输送系统在主动脉推进的过程中需同时经左肱动脉牵引出分支导丝,由此产生导丝缠绕现象。反复解缠绕可能带来一定风险,尤其是降主动脉扭曲明显时。因此,在支架推送至降主动脉近弓水平时,观察标记点位置,通过缓慢旋转输送器解除导丝缠绕。一旦输送系统进入主动脉弓部,不可再旋转输送器,需退至降主动脉后再做调整,必要时调整机头位置确定是否已解除缠绕。本组病例中,有1例降主动脉扭曲严重,输送器反复退回降主动脉,仍然无法解除缠绕,透视下调整机头,旋转输送器,最终成功解除。释放分支支架时,如果LSA基底部较宽,可能导致主体支架部分被“拉入”LSA中,造成整体支架变形,出现内漏。此时,可利用三叶球囊,贴附支架近端,重塑支架形态。本组病例中出现1例拉线后主体“凸入”LSA中,采用上述方法后,内漏消失(

图4 1例LSA基底部较宽患者术中影像 A:释放单分支一体化支架后造影,可见内漏(黄色箭头示内漏;1:单分支一体化支架因LSA基底部较宽,形态改变);B:三叶球囊重塑支架形态(2:三叶球囊);C:再次造影,内漏消失(3: 塑形后的一体化支架)
Figure 4 The intraoperative imaging data of one patient with a wide LSA base A: Angiography after deployment of the unibody stent showing the endoleak (the yellow arrows showing the endoleak; 1: morphological change of the stent due to wide LSA base); B: The stent form reshaped by trilobe balloon (2: trilobe balloon); C: Subsequent angiography showing absence of the endoleak (3: the unibody stent after shaping)
总结我院单中心腔内隔绝术中,累及LSA,锚定区不足15 mm,左椎动脉优势的病例,使用单分支覆膜支架安全有效。TEVAR术后并不提倡抗凝、抗血小板治疗。然后分支支架植入后是否常规抗凝或抗血小板,抗栓治疗的时限、强度与风险收益之间的关系等,仍需进一步研究。本组病例中分支远期通畅率、夹层的整体塑形等,需要更大样本的研究及长期随访。
参考文献
Bavaria JE, Appoo JJ, Makaroun MS, et al. Endovascular stent grafting versus open surgical repair of descending thoracic aortic aneurysms in low-risk patients: A multicenter comparative trial[J]. J Thorac Cardiovasc Surg, 2007, 133(2):369-377. doi: 10.1016/j.jtcvs.2006.07.040. [百度学术]
朱健, 郗二平, 朱水波, 等. 主动脉腔内修复术治疗肠缺血的B型胸主动脉夹层[J]. 临床外科杂志, 2017, 25(5):372-374. doi:10.3969/j.issn.1005-6483.2017.05.016. [百度学术]
Zhu J, Xi EP, Zhu SB, et al. Thoracic endovascular aortic repair in treating Stanford B aortic dissection with intestinal ischemia[J]. Journal of Clinical Surgery, 2017, 25(5):372-374. doi:10.3969/j.issn.1005-6483.2017.05.016. [百度学术]
Lombardi JV, Hughes GC, Appoo JJ, et al. Society for Vascular Surgery (SVS) and Society of Thoracic Surgeons (STS) reporting standards for type B aortic dissections[J]. J Vasc Surg, 2020, 71(3):723-747. doi: 10.1016/j.jvs.2019.11.013. [百度学术]
Feezor RJ, Martin TD, Hess PJ, et al. Risk Factors for Perioperative Stroke during Thoracic Endovascular Aortic Repairs (TEVAR)[J]. J Endovasc Ther, 2007, 14(4):568-573. doi: 10.1177/152660280701400420. [百度学术]
Maldonado TS, Dexter D, Rockman CB, et al. Left subclavian artery coverage during thoracic endovascular aortic aneurysm repair does not mandate revascularization[J]. J Vasc Surg, 2013, 57(1):116-124. doi: 10.1016/j.jvs.2012.06.101. [百度学术]
Antonello M, Menegolo M, Maturi C, et al. Intentional coverage of the left subclavian artery during endovascular repair of traumatic descending thoracic aortic transection[J]. J Vasc Surg, 2013, 57(3):684-690. doi: 10.1016/j.jvs.2012.08.119. [百度学术]
Bradshaw RJ, Ahanchi SS, Powell O, et al. Left subclavian artery revascularization in zone 2 thoracic endovascular aortic repair is associated with lower stroke risk across all aortic diseases[J]. J Vasc Surg, 2017, 65(5):1270-1279. doi: 10.1016/j.jvs.2016.10.111. [百度学术]
Sobocinski J, Patterson BO, Karthikesalingam A, et al. The effect of left subclavian artery coverage in thoracic endovascular aortic repair [J]. Ann Thorac Surg, 2016, 101(2):810-817. doi: 10.1016/j.athoracsur.2015.08.069. [百度学术]
Waterford SD, Chou D, Bombien R, et al. Left subclavian arterial coverage and stroke during thoracic aortic endografting: a systematic review[J]. Ann Thorac Surg, 2016, 101(1):381-389. doi: 10.1016/j.athoracsur.2015.05.138. [百度学术]
Zhang L, Lu Q, Zhou J, et al. Alternative management of the left subclavian artery in thoracic endovascular aortic repair for aortic dissection: a single-center experience[J]. Eur J Med Res, 2015, 20(1):57. doi: 10.1186/s40001-015-0147-z. [百度学术]
Malina M, Resch T, Sonesson B. EVAR and complex anatomy: an update on fenestrated and branched stent grafts[J]. Scand J Surg, 2008, 97(2):195-204. doi: 10.1177/145749690809700226. [百度学术]
Mangialardi N, Ronchey S, Malaj A, et al. Value and limitations of chimney grafts to treat arch lesions[J]. J Cardiovasc Surg (Torino), 2015, 56(4):503-511. [百度学术]
Shu C, Luo MY, Li QM, et al. Early Results of Left Carotid Chimney Technique in Endovascular Repair of Acute Non-A-Non-B Aortic Dissections[J]. J Endovasc Ther, 2011, 18(4):477-484. doi: 10.1583/11-3401.1. [百度学术]
O'Callaghan A, Mastracci TM, Greenberg RK, et al. Outcomes for supra-aortic branch vessel stenting in the treatment of thoracic aortic disease[J]. J Vasc Surg, 2014, 60(4):914-920. doi: 10.1016/j.jvs.2013.12.053. [百度学术]
Ohrlander T, Sonesson B, Ivancev K, et a1. The chimney graft:a technique for preserving or rescuing aortic branch vessels in stent—graft sealing zones[J]. J Endovasc Ther, 2008, 15(4):427-432. doi: 10.1583/07-2315.1. [百度学术]
Hsieh RW, Hsu TC, Lee M, et al. Comparison of type B dissection by open, endovascular, and medical treatments[J]. J Vasc Surg, 2019, 70(6):1792-1800. doi: 10.1016/j.jvs.2019.02.062. [百度学术]
Rizvi AZ, Murad MH, Fairman RM, et al. The effect of left subclavian artery coverage on morbidity and mortality in patients undergoing endovascular thoracic aortic interventions: a systematic review and meta-analysis[J]. J Vasc Surg, 2009, 50(5):1159-1169. doi: 10.1016/j.jvs.2009.09.002. [百度学术]
Caronno R, Piffaretti G, Tozzi M, et al. Intentional coverage of the left subclavian artery during endovascular stent graft repair for thoracic aortic disease[J]. Surg Endosc, 2006, 20(6):915-918. doi: 10.1007/s00464-005-0526-6. [百度学术]
Peterson BG, Eskandari MK, Gleason TG, et al. Utility of left subclavian artery revascularization in association with endoluminal repair of acute and chronic thoracic aortic pathology[J]. J Vasc Surg, 2006, 43(3):433-439. doi: 10.1016/j.jvs.2005.11.049. [百度学术]
Matsumura JS, Lee WA, Mitchell RS, et al. The Society for Vascular Surgery Practice Guidelines: Management of the left subclavian artery with thoracic endovascular aortic repair[J]. J Vasc Surg, 2009, 50(5):1155-1158. doi: 10.1016/j.jvs.2009.08.090. [百度学术]
吴鸿飞, 曾昭凡, 戚悠飞, 等. 体外开窗及开槽技术在主动脉弓部疾病TEVAR术的应用[J]. 中国普通外科杂志, 2019, 28(12):1449-1454. doi:10.7659/j.issn.1005-6947.2019.12.002. [百度学术]
Wu HF, Zeng ZF, Qi YF, et al. Application of in- vitro fenestration and scallop techniques in TEVAR for aortic arch disease[J]. Chinese Journal of General Surgery, 2019, 28(12):1449-1454. doi:10.7659/ j.issn.1005-6947.2019.12.002. [百度学术]
Riambau V, Böckler D, Brunkwall J, et al. Editor's Choice-Management of Descending Thoracic Aorta Diseases: Clinical Practice Guidelines of the European Society for Vascular Surgery (ESVS)[J]. Eur J Vasc Endovasc Surg, 2017, 53(1):4-52. doi:10.1016/j.ejvs.2016.06.005. [百度学术]
Wang T, Shu C, Li M, et al. Thoracic Endovascular Aortic Repair With Single/Double Chimney Technique for Aortic Arch Pathologies[J]. J Endovasc Ther, 2017, 24(3):383-393. doi:10.1177/1526602817698702. doi: 10.1177/1526602817698702. [百度学术]
Wang T, Shu C, Li QM, et al. First experience with the double chimney technique in the treatment of aortic arch diseases[J]. J Vasc Surg, 2017, 66(4):1018-1027. doi:10.1016/j.jvs.2017.02.035. [百度学术]
Lu Q, Liu L, Chang G, et al. Mid-term outcomes from a multicenter study: Is TEVAR safe for ascending aortic dissection?[J]. Int J Cardiol, 2018, 265:218-222. doi:10.1016/j.ijcard.2018.04.095. [百度学术]
Wang L, Huang Y, Guo D, et al. Application of triple-chimney technique using C-TAG and Viabahn or Excluder iliac extension in TEVAR treatment of aortic arch dilation diseases[J]. J Thorac Dis, 2018, 10(6):3783-3790. doi: 10.21037/jtd.2018.06.105. [百度学术]
Zhang T, Jiang W, Lu H, et al. Thoracic Endovascular Aortic Repair Combined with Assistant Techniques and Devices for the Treatment of Acute Complicated Stanford Type B Aortic Dissections Involving Aortic Arch[J]. Ann Vasc Surg, 2016, 32:88-97. doi: 10.1016/j.avsg.2015.10.030. [百度学术]
Zhu Y, Guo W, Liu X, et al. The single-centre experience of the supra-arch chimney technique in endovascular repair of type B aortic dissections[J]. Eur J Vasc Endovasc Surg, 2013, 45(6):633-638. doi: 10.1016/j.ejvs.2013.02.016. [百度学术]
孟庆友, 沈振亚, 黄浩岳, 等. 预开窗技术保留弓上分支血管在TEVAR治疗术中的临床应用经验[J]. 外科理论与实践, 2017, 22(4):322-326. doi:10.16139/j.1007-9610.2017.04.011. [百度学术]
Meng QQ, Shen ZY, Huang HY, et al. Clinical experience of preprocedural fenestrated technique during TEVAR for aortic arch disease to preserve supra-aortic branch[J]. Journal of Surgery Concepts & Practice, 2017, 22(4):322-326. doi:10.16139/j.1007-9610.2017.04.011. [百度学术]
方坤, 罗明尧, 舒畅. 重建左锁骨下动脉在胸主动脉腔内修复术中的必要性及术式选择[J]. 中华外科杂志, 2018, 56(10):756-759. doi:10.3760/cma.j.issn.0529-5815.2018.10.010. [百度学术]
Fang K, Luo MY, Shu C. Procedure selection of left subclavian artery revascularization in thoracic endovascular aortic repair[J]. Chinese Journal of Surgery, 2018, 56(10):756-759. doi:10.3760/cma.j.issn.0529-5815.2018.10.010. [百度学术]
Criado F. A percutaneous technique for preservation of arch branch patency during thoracic endovascular aortic repair (TEVAR): retrograde catheterization and stenting[J]. J Endovasc Ther, 2007, 14(1):54-58. doi: 10.1583/06-2010.1. [百度学术]