Abdominal aortic aneurysm repair

Options for abdominal aortic aneurysm (AAA) repair include both open and endovascular approaches. Patient selection for each of these requires careful consideration relating to patient health, fitness and anatomy. This article aims to provide an overview of the essential aspects of both open surgical repair (OSR) and endovascular AAA repair (EVAR), focussing upon decision making, the procedures, follow-up and long-term outcomes. Consideration is also given to more complex AAA repairs, including fenestrated/branched stent grafts and open juxta-renal aneurysm repairs. AAA epidemiology, screening, and work up for repair are covered in the previous article.     

Abdominal aortic aneurysm repair and colonic infarction: a risk factor appraisal

OBJECTIVE: Colonic infarction is a recognized complication of abdominal aortic aneurysm (AAA) surgery. The clinical difficulty in establishing the diagnosis combined with the patient's poor physiological status is usually associated with a fatal outcome. We assessed our experience with this problem to identify a possible risk factor profile for these patients. METHOD: Patients records were identified from the operative logs, intensive care unit, Hospital Inpatient Enquiry system and vascular unit databases over a 6-year period. RESULTS: A total of 405 patients underwent AAA repair during this period; 140 as emergency ruptures. Nine patients were identified from the databases with known colonic infarction (2.2%). One was a woman. The mean age was 70 years. Seven patients had emergency ruptures (5%). Twenty independent risk factors were analysed using univariate and multivariate logistic regression models. Significant risk factors identified by using a multivariate analysis included the nature of the presenting patient, preoperative hypotension, prolonged cross-clamp time, intra-operative ischaemia and postoperative acidosis. Confirmatory diagnosis was made by colonoscopy in eight patients. One patient survived following the salvage surgery. The mean duration of survival was 10.5 days. The overall mortality was 89% of patients. CONCLUSION: In our unit infrarenal AAA repair has a 2.2% rate of colonic infarction. A definitive diagnosis is best made by colonoscopy. A risk factor profile for the development of colonic infarction may be constructed on the basis of specific clinical parameters. Earlier intervention on the basis of this profile may ultimately reduce the current excessive mortality.     

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应用跨肾动脉支架人工血管腔内修复术治疗腹主动脉瘤,并探讨其手术适应证,操作要点及并发症的预防。方法对２例病人采用全麻,在动态数字减影血管造影监测下用跨肾动脉支架分叉型人工血管对腹主动脉瘤进行了腔内修复术,结果手术中ＤＳＡ提示动脉瘤消失,无内漏发生。术后１周及分别随访３和９个月,螺旋ＣＴ检查提示腔内人工血管无移位扭曲,血流通畅无内漏发生,结论腹主动脉瘤腔内修复术手术创伤小,病人恢复快,跨肾动支架人工     

腹主动脉瘤手术的麻醉

腹主动脉瘤(AAA)多发生于55岁以上男性,是一种严重的血管外科疾病。调查显示[1]男性和女性发病率分别为8.9%和2.2%,破裂后死亡率高达50%~80%,手术是惟一有效的治疗手段。由于AAA患者常合并心、脑、肾、肺等多种疾病,加之手术复杂、创伤较大,麻醉风险大,易出现各种意外。1 AAA相     

Laparoscopic-assisted abdominal aortic aneurysm repair

Since the advent of laparoscopy, the sweeping changes seen in general surgery have not been paralleled in vascular surgery. There have been case reports of laparoscopic-assisted aortobifemoral bypass for occlusive disease. Because aneurysmal disease comprises the majority of aortic surgery, we pursued animal and cadaveric feasibility studies for laparoscopic-assisted abdominal aortic aneurysm (AAA) repair. We present a case report of the first clinical case performed under Institutional Review Board protocol using this technique. The patient was a 62-year-old male with a 6-cm infrarenal AAA. After obtaining a pneumoperitoneum, a modified fish retractor was used to exclude the bowel. Ten 11-mm ports provided access to laparoscopically dissect the neck of the aneurysm and the iliac vessels. Then, a 10-cm minilaparotomy was performed and standard vascular clamps were inserted via the port incisions. Standard aneurysmorraphy was performed with a polytetrafluoroethylene (PTFE) tube graft. Laparoscopy conferred three major benefits: better visualization of the aneurysm neck, less bowel manipulation, and avoidance of hypothermia. This case report illustrates the feasibility of laparoscopic-assisted aneurysm repair. Controlled human studies will define the role of laparoscopy in AAA surgery.     

Abdominal aortic aneurysm surgery for octogenarians

Purpose  To define the indications for abdominal aortic aneurysm (AAA) surgery in octogenarians. Methods  We reviewed septuagenarians and octogenarians with a nonspecific AAA diagnosed at our hospital between January, 1990 and June, 2006. Results  Among a total 628 patients seen, 306 were in their 70s (group A) and 108 were in their 80s or older (group B). The mortality rate associated with elective surgery was 1.9% in group A and 7.0% in group B. Of the survivors, 12 (5.7%) of 210 in group A and 8 (15.1%) of 53 in group B died within 2 years. Of the patients who did not undergo surgery, 8 of 53 in group A and 8 of 31 in group B had AAAs greater than 6 cm in diameter. The rupture-free rates of AAAs greater than 6 cm in diameter were 64% at 1 year and 0% at 4 years in group A, and 88% at 1 year and 26% at 3 years in group B. The rupture-free rates of AAAs smaller than 6 cm in diameter were 95% at 3 years and 85% at 5 years in group A, and 100% at 5 years in group B. Conclusions  We concluded that AAAs over 6 cm in diameter were an appropriate indication for surgery in octogenarians.     

EndoSuture aneurysm repair versus fenestrated aneurysm repair in patients with short neck abdominal aortic aneurysm

ObjectiveThe aim of this study was to compare midterm results of EndoAnchors in EndoSuture aneurysm repair (ESAR) versus fenestrated endovascular aneurysm repair (FEVAR) in short neck abdominal aortic aneurysm (AAA).MethodsAll patients who underwent an ESAR procedure for a short neck AAA at our center between September 2017 and May 2020 were considered for analysis. To form the control group, preoperative computed tomography angiography of patients who underwent FEVAR for juxtarenal AAA between April 2012 and May 2020 were reviewed and patients who met short neck criteria selected. A propensity-matched score on neck length and neck diameter was calculated, resulting in 18 matched pairs. AAA shrinkage, type Ia endoleaks (EL), AAA-related reinterventions, and AAA-related deaths were compared.ResultsThe median AAA diameter was 54 mm (interquartile range [IQR], 52-61 mm) versus 58 mm (IQR, 53-63 mm) with a median neck length of 8 mm (IQR, 6-12 mm) vs 10 mm (IQR, 6-13 mm) in ESAR and FEVAR patients, respectively. Technical success was 100% in both groups. Procedural success was 94% in the ESAR group versus 100% in the FEVAR group. The median procedure duration was 138 mm (IQR, 113-182 mm) vs 240 mm (IQR, 199-293 mm) ( P < .001) and the median length of stay was 2 days (IQR, 2-3 days) vs 7 days (IQR, 6-7 days) (P < .001) in ESAR and FEVAR patients, respectively. No major hospital complications were observed in ESAR patients compared with two in FEVAR patients (11%) with one transient acute kidney injury and one transient paraplegia. The median follow-up was 23 months (IQR, 19-33 months) vs 36 months (IQR, 22-57 months) with 67% versus 61% AAA shrinkage in the ESAR and FEVAR groups, respectively (P = .73). No type Ia EL, proximal neck-related reinterventions, or AAA-related deaths were observed in either group. No AAA-related reintervention was observed in the ESAR group versus three reinterventions in the FEVAR group (P = .23).ConclusionsESAR seems to be a safe technique with no major postoperative complications or reinterventions observed during follow-up. It seems to offer similar midterm results as FEVAR in terms of type Ia EL, aneurysm shrinkage, and aneurysm-related mortality. ESAR seems to be a good off-the-shelf alternative to FEVAR in case of technical constraints.     

Abdominal aortic aneurysm: epidemiology,screening and work-up for repair

Abdominal aortic aneurysm (AAA) is a dilatation of the infra-renal abdominal aorta to greater than 3 cm. Population screening is offered to men in the year of their 65th birthday in the UK. Patients with small, asymptomatic AAAs (<5.5 cm) are entered into surveillance programmes and have their cardiovascular risk factors managed aggressively. An AAA ≥5.5 cm diameter, or one which is symptomatic, should be considered for surgical repair to prevent rupture. Aneurysm repair can be undertaken using either an open surgical or endovascular approach; the decision should be tailored to the individual patient and made by the surgeon and patient, with input from a multi-disciplinary team.     

Prognostic indicators following emergency aortic aneurysm repair

We performed a retrospective study of 135 patients presenting for emergency abdominal aneurysm repair to determine predictive factors for outcome. The outcome measures investigated were mortality in the operating theatre and intensive care, and at 28 and 100 days. Univariate analysis showed that the patient's age, hypotension on admission, aneurysmal rupture, pre-operative cardiopulmonary resuscitation, intra-operative blood loss and hypotension were risk factors for death either in the operating theatre or up to 100 days after surgery. Binary logistic regression identified the independent risk factors for survival. Operative survival was determined by acute factors such as pre-operative cardiopulmonary resuscitation, aneurysmal rupture and intra-operative hypotension. Longer term survival was determined by the patient's age, aneurysmal rupture, blood loss and blood pressure at admission. Using a binary logistic regression equation, from which a simplified risk score was derived, it is possible to predict the likelihood of survival of individual patients presenting for abdominal aortic aneurysm repair.     

腹主动脉瘤破裂行腔内修复术1例

患者女,80岁,因急性脑梗死伴腹痛9h入院。查体:下腹部左侧触及6～7cm搏动性包块,右侧中枢性面瘫,右上肢肌力0级,疼痛刺激无反应,右下肢外旋,可屈曲,无自主运动;左侧肢体肌力Ⅳ级,左侧Babinski征阳性,右侧病理征未引出。既往有糖尿病、高血压及腹主动脉瘤病史。     

腔内修复术与开放手术治疗腹主动脉瘤的对比分析

目的 对比分析传统开放手术与血管腔内修复术治疗腹主动脉瘤的疗效.方法 回顾性分析我科2009年至2012年经外科治疗的43例肾动脉下腹主动脉瘤患者的临床资料,行腔内治疗患者25例,行传统手术的18例,对比分析两组患者术前、术中情况,术后并发症及6个月内死亡情况.结果 两组患者在手术时间、术中失血及输血量方面,两组差异均有统计学意义（t值分别为8.377,5.124,5.043,P均＜0.001）;术后30d内并发症比较,差异有统计学意义（X2=0.09,P＜0.05）;术后6个月内死亡率比较,差异无统计学意义（x2=4.21,P＞0.05）.结论 血管腔内修复术比传统手术创伤小,手术时间短,术中失血及输血量少,术后短期并发症发生率低,但中远期死亡率无明显差别.     

主动脉腔内修复术治疗腹主动脉瘤或夹层合并腹部恶性肿瘤

目的 观察主动脉腔内修复术（EVAR）治疗腹主动脉瘤（AAA）或腹主动脉夹层（AAD）合并腹部恶性肿瘤的价值。方法 回顾性分析17例接受EVAR治疗的AAA（n=14）/AAD（n=3）合并腹部恶性肿瘤患者,其中12例于EVAR后接受腹腔镜肿瘤切除术、1例接受开腹肿瘤切除术,4例因心肺功能欠佳仅接受药物治疗;观察EVAR治疗效果。结果 EVAR成功率为100%,术中无严重不良反应及并发症;术后1个月CTA显示支架位置良好、通畅。术后随访1~28个月,期间均未见明显并发症,亦未见AAA/AAD相关死亡病例。结论 EVAR治疗AAA/AAD合并腹部恶性肿瘤效果较佳。     

腹主动脉瘤血管腔内治疗的体会

目的 观察腹主动脉瘤血管腔内治疗的近期疗效.方法 对12例肾下型腹主动脉瘤进行分析.结果 术中出血平均245 mL,住院时间平均8.6 d,术后禁食时间平均1.5 d.白细胞、血红蛋白和血小板以及肾功能、肝功能均在正常范围;PT和APTT术后延长,1周内恢复正常.并发症包括:肺部感染1例、腹胀2例,经保守治疗好转;内漏1例,3个月后自然消失.结论 腹主动脉瘤血管腔内治疗具有安全、微创及对人体内环境干扰小的优点.     

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目的 探讨腹主动脉瘤切除术中常规应用Baxter球囊导管暂时阻断髂动脉，防止下肢动脉栓塞并发症发生的有关问题。方法 对2001年10月至2002年4月应用Baxter阻断球囊导管行标准的腹主动脉瘤切除术25例，对其围手术期并发症作一总结。结果 围手术期除1例于术后第3天死于广泛心肌梗死之外，其余病例无一发生下肢动脉栓塞并发症。结论 术中常规应用Baxter阻断球囊导管具有易于手术操作，有效防止下肢缺血等优点，有助于进一步完善经典的腹主动脉瘤手术，对于国内开展该术式有一定借鉴。     

Ascending aortic aneurysm following aortico-ventricular tunnel repair

Aortico-left ventricular tunnel is a very rare congenital anomaly. An 18-year-old boy had undergone tunnel closure at 3 years of age. A moderate degree of aortic regurgitation remained postoperatively. Seven years later, aortic valve replacement for aortic regurgitation was performed. Eight years later, the ascending aortic aneurysm had grown to 63 mm in diameter. This dilatation became an operative indication. Ascending aortic replacement was performed with a Dacron graft. Pathological examination of the resected aortic wall revealed cystic medial degeneration. We report a rare case of ascending aortic aneurysm following surgical repair of the aortico-left ventricular tunnel and aortic valve replacement. (Jpn J Thorac Cardiovasc Surg 2006; 54:182-184)