Peripheral artery disease (PAD) of the lower extremities, which poses a major challenge in the field of global public health, has seen a rising trend in its incidence and disability rate year by year. With the continuous innovation of new diagnostic techniques, imaging evaluation methods, and treatment strategies, profound changes have taken place in the diagnosis and treatment paradigm in this field. Based on the “European Society for Vascular Surgery (ESVS) 2024 Clinical Practice Guidelines on the Management of Asymptomatic Lower Limb Peripheral Arterial Disease and Intermittent Claudication” issued by the European Society for Vascular Surgery in 2024, we systematically reviewed the relevant international guidelines in recent years and conducted horizontal comparisons. Combining with the latest clinical research evidence, we conducted an in-depth analysis from the perspective of evidence-based medicine on the strategic evolution, technical key point updates, and clinical evidence levels of endovascular treatment for lower extremity PAD. The aim is to provide an evidence-based medical basis for clinical decision-making.
ObjectiveTo summarize the diagnosis, surgical management, and outcomes of one case of complex unilateral renal artery aneurysm repaired by in situ open surgery. MethodThe clinical data of a patient with complex renal artery aneurysm admitted to the Department of General Surgery, West China Hospital of Sichuan University in December 2021 who underwent in situ open surgery were retrospectively analyzed. ResultsThe patient was a middle-aged (41 years old) female with a left renal artery aneurysm detected on physical examination. The renal artery three-dimensional CT imaging showed that the aneurysm was large in size and complex in anatomical structure; the aneurysm was located at the renal hilum, demonstrating multiple outflow tracts and close proximity to renal parenchyma and the ureter. Surgical management included in situ aneurysm resection combined with renal artery branch reconstruction and great saphenous vein bypass grafting. The operation duration was 5 h and the intraoperative urine output was 250 mL, and the intraoperative blood loss was about 400 mL. Four units of erythrocyte suspension, 200 mL of autologous recycled blood, and 400 mL of plasma were transfused during the operation. The results of the 36-month postoperative follow-up showed that the reconstructed renal arterial branches and the bridging vessel had satisfactory blood flow, and renal function was unaffected. ConclusionsThe results of this case suggest that in complex renal artery aneurysms involving multiple branches, in situ resection of the aneurysm followed by revascularization and main renal artery bypass grafting to restore flow is safe and feasible, and the long-term prognosis is good. However, it should be emphasized that the anatomy of renal artery aneurysms should be evaluated in detail preoperatively to determine the method of in situ revascularization. The results of the study also need to be further validated by larger samples and multicenter studies.
ObjectiveTo summarize the research progress of relationship between distal landing zone geometric and outcomes of endovascular aortic aneurysm repair (EVAR) for abdominal aortic aneurysm. MethodsThe domestic and foreign literature on the accumulation of the impact of proximal and distal landing zone geometric morphology on clinical outcomes, the evaluation methods for related complications of proximal and distal landing zones, preventive measures for adverse outcomes related to the geometric morphology of the distal landing zone, and the pathophysiological mechanisms of complications related to the distal landing zone were retrieved to make an review. ResultsThe irregular geometric morphology of the proximal landing zone was closely associated with adverse events following EVAR. The morphology of the distal landing zone was actually more complex than that of the proximal zone, and the measurement methods for its parameters were also more complicated. Common methods used in the literature for studying landing zones included the centerline distance method, the minimum distance method, and the landing area method. Primary preventive measures for adverse outcomes related to the geometry of the distal landing zone included increasing radial support force and contact area, using endostaples, and extending the landing zone. In addition to anatomical factors, the distal landing zone was also influenced by various pathophysiological factors. ConclusionsThe morphology and related pathological changes of the distal landing zone significantly impact the clinical outcomes following EVAR for abdominal aortic aneurysm. However, current research on the distal landing zone is limited. Future studies should focus on developing new technologies and methods to improve the evaluation and management of the distal landing zone, thereby reducing the complications after EVAR, enhancing the success rate of the surgery, and improving patient survival quality.
This paper interprets clinical practice guideline for abdominal aortic aneurysm of American Society for Vascular Surgery in 2018.
ObjectiveTo investigate the impact of anatomical variations of the isolated left vertebral artery (ILVA) on clinical outcomes and imaging outcomes in patients with Stanford type B aortic dissection (TBAD) who underwent thoracic endovascular aortic repair. MethodsThe clinical data of patients with TBAD in West China Hospital, Sichuan University from January 2016 to December 2023 were collected, and the differences of clinical outcomes and imaging outcomes between patients with and without ILVA were compared. ResultsBased on the inclusion criteria and the result of propensity score-based matching, 82 patients with TBAD were included, including 17 patients with ILVA (ILVA group) and 65 patients without ILVA (control group). There was no significant difference between the two groups in terms of the radiological and surgical information (P>0.05). The median time of the follow-up for these 82 patients were 37 months, during which there were no significant differences in aortic-related death, aortic event, stroke, adverse aortic remodeling, type Ⅰ A endoleak, and retrograde progression between the two groups (P>0.05). Compared with the control group, the re-intervention rate [HR=2.56, 95%CI (1.55, 8.11), P=0.03] and the incidence of type Ⅱ internal leakage [OR=1.36, 95%CI (1.08, 2.11), P=0.04] in the ILVA group were higher. ConclusionsNo significant differences were observed for ILVA patients in terms of serious adverse events such as aortic-related death and retrograde progression, comparing with the patients with normal aortic arch. However, the patients with ILVA were more susceptible to complications such as reintervention and type Ⅱ endoleak, which warranted the necessity of intensive postoperative follow-up for these patients.
ObjectiveTo comprehensively summarize the latest research advances in the epidemiology, pathophysiological mechanisms, imaging diagnostic techniques, and clinical intervention strategies of type Ⅱ endoleak after endovascular abdominal aortic aneurysm repair, so as to provide references for clinical diagnosis and treatment. MethodsRelevant foreign literatures published in recent years were systematically retrieved, and the research on pathophysiological mechanisms, diagnostic methods and treatment strategies of type Ⅱ endoleak was summarized, analyzed and reviewed. ResultsThe core value of matrix metalloproteinases and tissue inhibitors of metalloproteinases in type Ⅱ endoleak lies in diagnosis prediction and disease monitoring. These molecules may be involved in the pathological process of type Ⅱ endoleak, yet their specific mechanisms of action require further investigation. Computed tomography angiography remains the “gold standard” for the diagnosis of type Ⅱ endoleak, while contrast-enhanced ultrasound and magnetic resonance imaging/magnetic resonance angiography can serve as effective supplements. Prophylactic embolization of collateral arteries plays a certain role in delaying the occurrence of type Ⅱ endoleak. Clinical interventions include conservative observation with regular follow-up, endovascular embolization and open surgery, yet a consensus on the optimal regimen has not been reached. ConclusionsClinical diagnosis and treatment of type Ⅱ endoleak still face numerous challenges. In the future, large-sample and multicenter clinical trials should be conducted to clarify the characteristics of its natural course, optimize follow-up and intervention protocols, and further explore its pathophysiological mechanisms, so as to provide new theoretical basis and technical support for the precise diagnosis and treatment of type Ⅱ endoleak.
Objective To observe the effects of sarpogrelate hydrochloride in prevention and treatment for ischemia of gluteal and limb following endovascular repair of abdominal aortic aneurysm （EVAR）. Methods Clinical data were analyzed in 174 patients with abdominal aortic aneurysm （AAA） who underwent EVAR from January 2006 to January 2011. The patients’ mean age was （71.8±8.2）years old （male： 148 cases， female： 26 cases）. The diameter of abdominal aortic aneurysm was （55.2±12.9） mm. AAA involving common iliac artery was in 52 （29.9%） patients. Bifurcated endografts and aorto-uni-iliac （AUI） endografts with crossover bypass were used in 169 patients （97.1%） and 5 patients （2.9%）， respectively. Sarpogrelate hydrochloride were used in 39 patients with gluteal and limb ischemia due to exclusion of bilateral and unilateral internal iliac arteries among 174 patients. Sarpogrelate hydrochloride， 100 mg， three times daily，was taken for 2-4 weeks. Symptoms of gluteal and limb ischemia were followed-up.Results All of patients with AAA was repaired by EVAR successfully and no conversion to open repair. General anesthesia 〔50.6%（88/174）〕， epidural anesthesia 〔30.0%（52/174）〕， and local anesthesia 〔19.5%（34/174）〕 were used. Blood loss was （125.2±43.1） ml and no blood transfusion during operation. Operative time was （145.5±38.7） min, ICU stay time was （14.7±5.2） h， and postoperative fasting time was （7.2±4.3） h. The duration of postoperative hospital stay was （9.1±2.7） d. The perioperative complication rate was 12.6% （22/174）. The 30-day mortality rate was 1.1% （2/174）. Gluteal and limb claudication occurred in 2 paients and 5 patients respectively among 29 patients with EVAR due to exclusion of unilateral internal iliac artery， intermittent claudication distance was 100-200 meters. Gluteal muscle pain and limb claudication for less than 200 meters occurred in 4 patients due to exclusion of bilateral internal iliac artery. The symptoms were relieved after Sarpogrelate hydrochloride， 100 mg， three times daily， was taken for 2-4 weeks. No gluteal gangrene occurred and claudication distances were more than 500 meters when walking， no any interventional and surgical procedures were required， all of them were doing well for median 16.1 months follow-up period. Conclusions Sarpogrelate hydrochloride has definite effects on prevention and treatment for gluteal and limb ischemia following endovascular repair of abdominal aortic aneurysm，especially for exclusion of bilateral and unilateral internal iliac arteries during EVAR