Relationship between acute kidney injury before thoracic endovascular aneurysm repair and in-hospital outcomes in patients with type B acute aortic dissection

Objective Acute kidney injury （AKI） frequently occurs after catheter-based interventional procedures and increases mortality. However, the implications of AKI before thoracic endovascular aneurysm repair （TEVAR） of type B acute aortic dissection （AAD） remain unclear. This study evaluated the incidence, predictors, and in-hospital outcomes of AKI before TEVAR in patients with type B AAD. Methods Between 2009 and 2013, 76 patients were retrospectively evaluated who received TEVAR for type B AAD within 36 h from symptom onset. The patients were classified into no-AKI vs. AKI groups, and the severity of AKI was further staged according to kidney disease： im- proving global outcomes criteria before TEVAR. Results The incidence of preoperative AKI was 36.8%. In-hospital complications was significantly higher in patients with preoperative AKI compared with no-AKI （50.0% vs. 4.2%, respectively; P 〈 0.001）, including acute renal failure （21.4% vs. O, respectively; P 〈 0.001）, and they increased with severity of AKI （P 〈 0.001）. The maximum levels of body tem- perature and white blood cell count were significantly related to maximum serum creatinine level before TEVAR. Multivariate analysis showed that systolic blood pressure on admission （OR： 1.023; 95% CI： 1.003-1.044; P ： 0.0238） and bilateral renal artery involvement （OR： 19.076; 95% CI： 1.914 190.164; P = 0.0120） were strong predictors of preoperative AKI. Conclusions Preoperative AKI frequently occurred in patients with type B AAD, and correlated with higher in-hospital complications and enhanced inflammatory reaction. Systolic blood pressure on admission and bilateral renal artery involvement were major risk factors for AKI before TEVAR.

Review of Thoracic Endovascular Aneurysm Repair (TEVAR), Spinal Cord Ischemia (SCI), Cerebrospinal Fluid (CSF) Drainage and Blood Pressure (BP) Augmentation

The object of this review is to examine the role of TEVAR in causing SCI. The anatomy and physiology of blood flow to the spinal cord is examined. The role of auto regulation of blood flow within the spinal cord is also examined. This review examines the reported results from the scientific literature of the effect of thoracic aortic aneurysm repair on spinal cord blood flow. In the light of the-se findings several conclusions can reasonably be reached. These conclusions are that the development of SCI can reasonably be predicted based on complexity and extent of the TEVAR procedure performed and BP augmentation and CSF drainage can significantly reduce the impact of SCI.

Successful use of emergent endovascular aneurysm repair for a ruptured hypotensive abdominal aortic aneurysm

Ruptured aortic aneurysm has a surgical mortality ranging from 50%-70%, one of the highest rates of all vascular emergencies [1-5]. Less invasive approaches to repair have been developed that could potentially improve these statistics [1,5-7]. Endovascular aneurysm repair (EVAR) is a minimally invasive approach that may be an alternative to open surgical repair for select cases of ruptured aortic aneurysms [1,5]. Unfortunately, the role of EVAR in patients with acute rupture of an abdominal aneurysm is not clear, especially for patients that are hemodynamically unstable [1,8-10]. The literature is limited regarding use of EVAR in this population of patients. We present a case of the successful use of EVAR for an emergent repair in a hypotensive hemodynamically unstable patient with an acutely ruptured abdominal aortic aneurysm (AAA).

Central nervous injury risk factors after endovascular repair of a thoracic aortic aneurysm with type B aortic dissection

Aortic dissection is the deadliest disease of the cardiovascular system.Type B aortic dissection accounts for 30%-60%of aortic dissections and is mainly treated by endovascular repair of thoracic endovascular aneurysm repair(TEVAR).However,patients are prone to various complications after surgery,with central nervous system injury being the most common,which seriously affects their prognosis and increases the risk of disability and death.Therefore,exploring the risk factors of central nervous system injury after TEVAR can provide a basis for its prevention and control.AIM To investigate the risk factors for central nervous system injury after the repair of a thoracic endovascular aneurysm with type B aortic dissection.METHODS We enrolled 306 patients with type B aortic dissection who underwent TEVAR at our hospital between December 2019 and October 2022.The patients were categorized into injury(n=159)and non-injury(n=147)groups based on central nervous system injury following surgery.The risk factors for central nervous system injury after TEVAR for type B aortic dissection were screened by comparing the two groups.Multivariate logistic regression analysis was performed.RESULTS The Association between age,history of hypertension,blood pH value,surgery,mechanical ventilation,intensive care unit stay,postoperative recovery times on the first day after surgery,and arterial partial pressure of oxygen on the first day after surgery differed substantially(P<0.05).Multivariate logistic regression analysis indicated that age,surgery time,history of hypertension,duration of mechanical ventilation,and intensive care unit stay were independent risk factors for central nervous system injury after TEVAR of type B aortic dissection(P<0.05).CONCLUSION For high-risk patients with central nervous system injury after TEVAR of type B aortic dissection,early intervention measures should be implemented to lower the risk of neurological discomfort following surgery in high-risk patients with central nervous system injury after TEVAR for type B aortic dissection.

Transarterial Embolization versus Translumber Embolization for Type Ⅱ Endoleak after Endovascular Abdomi nal Aortic Aneurysm Repair:A Meta-Analysis

Objective Type II endoleak is the most common subtype of endoleak as a complication after endovascular aneurysm repair(EVAR).The efficacy of transarterial(TA)embolization and translumber(TL)embolization in the management of type II endoleak remains equipoise.The aim of this study is to compare the technical and clinical success between TA embolization andTL embolization for type II endoleak after EVAR.Methods The protocol was registered(CRD 42018114453)and the electronic databases(Pubmed,Embase,Web of Science,and Cochrane)were systematically searched till March 2019.The search terms included EVAR,type II endoleak,and embolization.The articles were read and extracted by two authors independently to include randomized control trails and retrospective studies that compared TA embolization and TL embolization in patients who developed type II endoleak after EVAR.The technical and clinical success rates were metaanalyzed with random effect model.Results A total of 6 articles with 268 patients and 290 type II endoleaks were included.The pooled odds ratio(OR)of technical success rate for TA vs.TL was 0.56(95%C7,0.10-3.18;P=0.51)and the pooled OR of clinical success rate for TA vs.TL was 0.31(95%CI,0.07-1.29;P=0.11).As a limitation,6 articles were all retrospective studies which may lead to bias.Conclusion Both TA.andTL could be eflective procedure of embolizations to resolve the type II endoleak.The metaanalysis result indicated that TA embolization was not inferior toTL embolization in technical success and clinical success.

Influence of severe neck angulation on hemodynamic and clinical outcomes following endovascular aneurysm repair:a hemodynamic analysis and a retrospective cohort study

Background: For patients with severe neck angulation (SNA), hemodynamic and clinical outcomes following endovascular aneurysm repair (EVAR) are still unclear. This study aimed to explore the influence of SNA on hemodynamic and clinical outcomes following EVAR.Methods: This study included a hemodynamic analysis and a retrospective cohort study from West China Hospital of Sichuan University between January 2011 and December 2020. The Cox regression model, inverse probability of treatment weighting (IPTW) analysis, sensitivity analysis, and subgroup analysis were applied. Primary outcome was type IA endoleak (T1AEL).Results: In this hemodynamic analysis, nine non-severe neck angulation (nSNA) and 16 SNA idealized models were constructed. We found a significant difference in drag force between SNA and nSNA models (7.016 ± 2.579 Nvs. 4.283 ± 1.460 N,P = 0.008), and proximal neck angles were significantly associated with the magnitude of drag force (F = 0.082 ×α-0.006 ×β + 2.818, α: 95% confidence interval [CI] 0.070-0.094;P = 0.001;β: 95% CI -0.019 to 0.007;P = 0.319). In our cohort study, 514 nSNA patients (71.5 ± 8.5 years;459 males) and 208 SNA patients (72.5 ± 7.8 years;135 males) were included, with a median follow-up duration of 34 months (16-63 months). All baseline characteristics were well balanced after IPTW matching. We found that SNA was associated with a significant risk of adverse limb event (hazard ratio [HR] 2.18, 95% CI 1.09-3.12), yet was not associated with T1AEL, overall survival, or reintervention. In patients without proximal or distal additional procedures (DAP), subgroup analyses suggested a significant risk of T1AEL (Proximal: HR 5.25, 95% CI 1.51-18.23;Distal: HR 5.07, 95% CI 1.60-16.07) and adverse limb event (Proximal: HR 2.27, 95% CI 1.01-5.07;Distal: HR 2.91, 95% CI 1.30-6.54) in SNA patients. However, no noticeable difference was observed in patients with proximal or DAP.Conclusions: SNA has a critical influence on hemodynamic and clinical outcomes following EVAR. Appropriate additional procedures may be of great benefit to SNA patients.

Incidental extravascular findings in computed tomographic angiography for planning or monitoring endovascular aortic aneurysm repair: Smoker patients, increased lung cancer prevalence?

AIM To validate the feasibility of high resolution computed tomography(HRCT) of the lung prior to computed tomography angiography(CTA) in assessing incidental thoracic findings during endovascular aortic aneurysm repair(EVAR) planning or follow-up.METHODS We conducted a retrospective study among 181 patients(143 men, mean age 71 years, range 50-94) referred to our centre for CTA EVAR planning or followup. HRCT and CTA were performed before or after 1 or 12 mo respectively to EVAR in all patients. All HRCT examinations were reviewed by two radiologists with 15 and 8 years experience in thoracic imaging. The results were compared with histology, bronchoscopy or follow-up HRCT in 12, 8 and 82 nodules respectively. RESULTS There were a total of 102 suspected nodules in 92 HRCT examinations, with a mean of 1.79 nodules per patient and an average diameter of 9.2 mm(range 4-56 mm). Eightynine out of 181 HRCTs resulted negative for the presence of suspected nodules with a mean smoking history of 10 pack-years(p-y, range 5-18 p-y). Eighty-two out of 102(76.4%) of the nodules met criteria for computed tomography follow-up, to exclude the malignant evolution. Of the remaining 20 nodules, 10 out of 20(50%) nodules, suspected for malignancy, underwent biopsy and then surgical intervention that confirmed the neoplastic nature: 4(20%) adenocarcinomas, 4(20%) squamous cell carcinomas, 1(5%) small cell lung cancer and 1(5%) breast cancer metastasis); 8 out of 20(40%) underwent bronchoscopy(8 pneumonia) and 2 out of 20(10%) underwent biopsy with the diagnosis of sarcoidosis.CONCLUSION HRCT in EVAR planning and follow-up allows to correctly identify patients requiring additional treatments, especially in case of lung cancer.

Follow-up of endovascular aortic aneurysm repair:Preliminary validation of digital tomosynthesis and contrast enhanced ultrasound in detection of medium- to long-term complications

AIM: To validate the feasibility of digital tomosynthesis of the abdomen(DTA) combined with contrast enhanced ultrasound(CEUS) in assessing complications after endovascular aortic aneurysm repair(EVAR) by using computed tomography angiography(CTA) as the gold standard.METHODS: For this prospective study we enrolled 163 patients(123 men; mean age, 65.7 years) referred for CTA for EVAR follow-up. CTA, DTA and CEUS were performed at 1 and 12 mo in all patients, with a maximum time interval of 2 d.RESULTS: Among 163 patients 33 presented complications at CTA. DTA and CTA correlated for the presence of complications in 32/33(96.96%) patients and for the absence of complications in 127/130(97.69%) patients; the sensitivity, specificity, positive predictive value(PPV), negative predictive value(NPV) and accuracy of DTA were 97%, 98%, 91%, 99%, and 98%, respectively. CEUS and CTA correlated for the presence of complications in 19/33(57.57%) patients and for the absence of complications in 129/130(99.23%) patients; the sensitivity, specificity, PPV, NPV and accuracy of CEUS were 58%, 99%, 95%, 90%, and 91%, respectively. Sensitivity, specificity and accuracy of combining DTA and CEUS together in detecting EVAR complications were 77%, 98% and 95%, respectively.CONCLUSION: Combining DTA and CEUS in EVAR follow-up has the potential to limit the use of CTA only in doubtful cases.

Using a Surgeon-modified Iliac Branch Device to Preserve the Internal Iliac Artery during Endovascular Aneurysm Repair： Single-center Experiences and Early Results

Background：To evaluate the feasibility of a new surgeon-modified iliac branch device （IBD） technique to maintain pelvic perfusion in the management of common iliac artery （CIA） aneurysm during endovascular aneurysm repair （EVAR）.Methods：From January 2011 to December 2013,a new surgeon-modified IBD technique was performed in department of vascular surgery of Peking Union Medical College Hospital in five patients treated for CIA aneurysm with or without abdominal aortic aneurysm.A stent-graft limb was initially deployed in vitro,anastomosed with vascular graft,creating a modified IBD reloaded into a larger sheath,with or without a guidewire preloaded into the side branch.The reloaded IBD was then placed in the iliac artery,with a covered stent bridging internal iliac artery and the branch.Finally,a bifurcated stent-graft was deployed,and a limb device was used to connect the main body and IBD.Results：Technical successes were obtained in all patients.The mean follow-up length was 24 months （range：6-38 months）.All grafts remained patent without any sign of endoleaks.There were no aneurysm ruptures,deaths,or other complications related to pelvic flow.Conclusions：Using the surgeon-modified IBD to preserve pelvic flow is a feasible endovascular technique and an appealing solution for personalized treatment of CIA aneurysm during EVAR.

Endovascular Repair for Abdominal Aortic Aneurysm with an Ectopic Pelvic Kidney: Case Report and Procedural Consideration of the Aberrant Renal Artery

A 91-year-old female presented with a pulsatile abdominal mass. Her past medical history included hypertension and hyperlipidemia. A 6.9 cm infrarenal abdominal aortic aneurysm, with a left ectopic pelvic kidney and two aberrant renal arteries, one each from the left and right common iliac arteries was found on computed tomography. Because of the high risk of rupture, surgery was recommended and an endovascular aneurysm repair was performed. The antegrade flow of the aberrant renal artery from the left common iliac artery was preserved. The right aberrant renal artery was covered with stent graft. The patient’s serum creatinine level remained unchanged throughout the postoperative course, with an uneventful postoperative recovery.

Endovascular treatment of aortoiliac aneurysms: From intentional occlusion of the internal iliac artery to branch iliac stent graft

Approximately 20%-40% of patients with abdominal aortic aneurysms can have unilateral or bilateral iliac artery aneurysms and/or ectasia. This influences and compromises the distal sealing zone during endovascular aneurysm repair. There are a few endovascular techniques that are used to treat these types of aneurysms, including intentional occlusion/over-stenting of the internal iliac artery on one or both sides, the "bell-bottom" technique, and the more recent method of using an iliac branch stent graft. In some cases, other options include the "snorkel and sandwich" technique and hybrid interventions. Pelvic ischemia, represented as buttock claudication, has been reported in 16%-55% of cases; this is followed by impotence, which has been described in 10%-17% of cases following internal iliac artery occlusion. The bellbottom technique can be used for a common iliac artery up to 24 mm in diameter given that the largest diameter of the stent graft is 28 mm. There is a paucity of data and evidence regarding the "snorkel and sandwich" technique, which can be used in a few clinical scenarios. The hybrid intervention is comprised of a surgical operation, and is not purely endovascular. The newest branch stent graft technology enables preservation of the anterograde flow of important side branches. Technical success with the newest technique ranges from 85%-96.3%, and in some small series, technical success is 100%. Buttock claudication was reported in up to 4% of patients treated with a branch stent graft at 5-year follow-up. Mid- and short-term follow-up results showed branch patency of up to 88% during the 5-6-year period. Furthermore, branch graft occlusion is a potential complication, and it has been described to occur in 1.2%-11% of cases. Iliac branch stent graft placement represents a further development in endovascular medicine, and it has a high technical success rate without serious complications.

腹主动脉瘤腔内治疗现状

腔内修复已成为腹主动脉瘤(abdominal aortic aneurysm, AAA)治疗的首选策略。近些年腔内技术迅猛发展,面对不同类型的AAA,涌现出以“开窗”“烟囱”、分支技术为代表的创新技术,而且基于这些技术也设计出了诸多成品化的新型支架。本文从技术、循证、指南三个角度对现阶段不同解剖类型的腹主动脉瘤腔内修复现状进行述评,并对备受关注的并发症问题进行阐述。

B型主动脉夹层患者TEVAR术中应用股动脉穿刺预置缝合技术与股动脉切开技术的效果对比分析

目的:对比在B型主动脉夹层患者胸主动脉腔内修复术(Thoracic Endovascular Aneurysm Repair,TEVAR)术中应用股动脉穿刺预置缝合技术与股动脉切开技术的效果。方法:回顾性收集2020年4月至2023年4月期间于本院血管外科行TEVAR术治疗的137例B型主动脉夹层患者的临床资料。根据手术方式不同,将患者分为切开组(采用股动脉切开术,68例)和缝合组(采用股动脉穿刺预置缝合术,69例)。分析比较两组的手术指标及康复情况、生活质量及并发症(术后住院期间)发生情况。结果:缝合组的手术时间、术后下床活动时间及住院时间均显著短于切开组,术中出血量显著少于切开组(P<0.05)。缝合组术后6 m及1 y的生活质量评分均显著高于切开组(P<0.05)。两组的术后并发症发生率无显著差异(P>0.05)。结论:与股动脉切开技术比较,EVAR术中应用股动脉穿刺预置缝合技术可缩短B型主动脉夹层患者手术时间、术后下床活动时间及住院时间,减少术中出血量,改善生活质量,且安全性较高。

可扩张鞘管在复杂髂股动脉入路经皮胸主动脉腔内修复术的安全性与有效性研究

目的:本研究评估在经皮胸主动脉腔内修复术(thoracic endovascular aneurysm repair TEVAR)中,可扩张鞘管用于复杂髂股动脉入路的安全性和有效性。方法:回顾性分析2023年1月至2023年12月,在本中心接受TEVAR治疗的18例患者,其中男性12例,女性6例。共纳入25个髂股动脉入路。随访并记录术前、术后30d和90d随访患者髂股动脉入路血管直径及相关并发症情况。结果:技术成功率为100%。术后30d随访入路血管最小直径及平均直径较术前增大值中位数分别为0.5(0.1,1.2)mm(Z=-4.207,P<0.001)、0.2(0.1,0.3)mm(Z=-3.096,P=0.002),术后90d随访入路最小直径及平均直径较术后30d变化,差异无统计学意义(P>0.05)。1例患者发生假性动脉瘤(SIR2级),经皮注射凝血酶治疗。随访期间无其他入路相关并发症发生,总并发症发生率为4%。结论:在TEVAR术中将可扩张鞘管应用于复杂髂股动脉入路是安全有效的。

以3D影像融合技术引导腔内治疗主动脉疾病研究进展

3D影像融合技术是以锥形束CT为介导将介入治疗前和治疗中的影像数据融合并以之引导介入操作,可显著提高腔内介入治疗主动脉疾病成功率,减少辐射暴露和碘对比剂用量并缩短治疗时间等。本文就3D影像融合技术用于引导腔内治疗主动脉疾病研究进展进行综述。

腹主动脉瘤腔内修复术后Ⅱ型内漏的预防及治疗进展

腹主动脉瘤是严重的血管外科疾病,可危及生命,其发病率逐年上升。腹主动脉瘤腔内修复术(endovascular aneurysm repair, EVAR)是目前肾下型腹主动脉瘤(abdominal aortic aneurysm, AAA)最广泛使用的治疗方法。Ⅱ型内漏是EVAR术后最常见的并发症,也是术后二次干预的主要原因,然而目前对Ⅱ型内漏的自然转归及治疗尚存在争议。本文拟通过对Ⅱ型内漏预防及治疗的研究进展进行文献回顾,为临床决策提供参考。

西藏地区腹主动脉瘤腔内隔绝修复术的中期随访结果分析

目的分析西藏地区腹主动脉瘤(AAA)患者腔内隔绝修复手术的转归情况。方法收集2015年5月至2023年4月西藏自治区人民医院收治的31例AAA患者的临床资料,所有患者均进行了AAA腔内隔绝修复术。收集所有患者的基本特征、合并疾病、AAA最大直径、术前检查结果等信息,观察所有患者的治疗情况、围手术期并发症发生情况及随访结果。结果31例AAA患者中,美国麻醉医师协会(ASA)3级患者18例,4级患者7例。27例患者经双侧股动脉入路,4例患者经双侧股动脉和左侧肱动脉入路,手术成功率为100%。围手术期间1例患者出现臀肌跛行症状。随访时间为1~93个月。随访期间,失访2例,死亡2例,Ⅰ型内漏1例,Ⅱ型内漏1例。经随访,所有患者未发生支架移位、内漏等并发症。结论在西藏地区采用腔内隔绝修复术治疗AAA是安全、有效的。

感染性主动脉瘤诊疗进展

感染性主动脉瘤(infective native aortic aneurysm, INAA)是一种罕见且致命的感染性疾病,由病原微生物(主要为细菌)破坏主动脉管壁而引起。感染性主动脉瘤进展较快、病情复杂、破裂率高、预后较差,其诊断与治疗一直是血管外科领域的热点与难点。本文根据感染性主动脉瘤领域发表的相关文献,综述其病因学、病理生理学、临床表现、诊断、治疗和并发症,以期为今后感染性主动脉瘤的相关研究和诊疗提供指导。

胸腹主动脉瘤精准外科诊疗体系构建及应用

胸腹主动脉瘤(TAAA)累及主动脉及胸腹段多支内脏动脉和脊髓供血动脉,但因动脉病变受累范围广、异质性高,手术重建主动脉及多支内脏动脉难度较大,围手术期病死率及截瘫、脏器缺血等严重并发症发生率较高,因此,TAAA患者需要制定个体化的临床诊治策略。本述评归纳总结中国医学科学院北京协和医学院北京协和医院TAAA精准外科诊疗体系的构建与应用,通过改良传统术式建立TAAA全腔内治疗体系,应用血流仿真模型制定手术策略,优化特殊病因TAAA的诊疗策略,从而提升TAAA的诊治水平,改善患者的预后情况,以期为TAAA的诊治提供参考。

Stanford A型主动脉夹层治疗的发展及现状

主动脉夹层(aortic dissection,AD)是一种极其凶险的心血管外科急危重症,发病急,进展迅速,病情复杂凶险,病死率极高。该疾病术后易出现并发症,手术死亡率高。AD有多种分型,Stanford分型是临床最常用的分型之一,以Stanford A型AD最常见且最凶险。随着医疗技术的快速发展,目前AD的诊治水平已经显著提升,本文就Stanford A型AD治疗的发展及现状作一综述。