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Background Chronic limb-threatening ischemia (CLTI) is the most severe manifestation of peripheral arterial disease. Various revascularization techniques are employed to treat peripheral arterial disease. Intravascular shockwave lithotripsy (IVL) is a relatively new procedure for the treatment of calcific lower limb peripheral arterial diseases (PAD). Objectives To assess the effectiveness and safety of shockwave lithotripsy in patients with severe PAD through an evaluation of limb salvage rate and patient survival. Methods A retrospective study of all patients treated with shockwave lithotripsy between November 2019 and June 2024 was performed. The primary outcome was amputation-free survival and secondary outcomes were potential complications of IVL (thrombo-embolization, perforation, and restenosis). Patients were followed up in the clinic and assessed both clinically and with a duplex scan at three months. Results A total of 38 patients were included in the study. The median age was 71 years; 28 were males. Among the patients, 28 (73.68%) were diabetic, 4 patients (10.53%) were current smokers, 10 patients (26.32%) were ex-smokers, and 24 patients (63.16%) were non-smokers. According to the Rutherford classification of PAD, 33 of the 38 patients were in stages 4-6. Only five patients were stage 3. Total number of treated arteries was 47. Treated lesions were 49% in the superficial femoral artery (SFA), 36% in the popliteal artery, 8% in the common femoral artery (CFA), 4% received treatment of the iliac arteries, and 2% of the posterior tibial artery. All treated arteries showed improved angiographic results. Four patients (10.53%) developed distal embolization. No perforation was recorded, and no significant flow-limiting dissection was recorded to require treatment. At the three-month follow-up, imaging revealed improvement in 58% of patients while 5% showed no improvement. Notably, follow-up imaging was not conducted in 37% of patients due to evident clinical improvement such as ulcer healing, palpable pulses, and the presence of Doppler signals. Seven patients required reintervention within three months after the initial IVL operation and 4 patients got revascularized after this period resulting in 11 patients requiring revascularisation after the initial operation. Amputation-free survival was 79% (30 patients). Conclusion Shockwave lithotripsy is associated with a high limb salvage rate and low complication rate. Further research is needed into long-term effectiveness and the role of shockwave treatment as an adjuvant to traditional revascularization techniques of patients with CLTI and short-distance claudicants., Competing Interests: Human subjects: Consent for treatment and open access publication was obtained or waived by all participants in this study. Animal subjects: All authors have confirmed that this study did not involve animal subjects or tissue. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2025, Salihi et al.)

Introduction Carotid endarterectomy (CEA) is the gold standard intervention for patients experiencing transient ischemic attacks (TIAs) or embolic strokes with >50% internal carotid artery (ICA) stenosis supplying index hemispheric territory. The recommended period for CEA is 14 days post-index event; this period carries a heightened risk for second ischemic events. However, implementation of this stringent timeline often encounters delays stemming from multifaceted factors. The centralization of vascular services, designed to enhance patient care, introduces a paradigm shift. Centralization's efficacy in improving patient outcomes, particularly in the CEA pathway, is a subject of ongoing investigation. Our study aims to discern the impact of centralized services on the timeliness of CEA for symptomatic carotid artery stenosis, shedding light on this complex interplay of factors. Methods This retrospective study analyzed CEA data at the Bedfordshire, Luton, and Milton Keynes Vascular Network between January 2021 and June 2023. Eligible patients exhibited symptomatic carotid artery stenosis, with asymptomatic cases; those unfit for surgery or receiving best medical therapy only were excluded. Patients were categorized by their primary referral location: Hub, Spoke-1, or Spoke-2. Demographic and referral data were collected, and timelines from symptom onset to surgery were recorded. Continuous variables were expressed as means and standard deviations, and categorical variables as counts and percentages. Box plots illustrated the relationship between referral origin and surgery timing, and the Classification and Regression Tree (CART) assessed second events. Statistical significance was determined using Fisher's exact and chi-square tests, with p<0.05 indicating significance. Results A total of 148 patients underwent CEA after implementing exclusion criteria. 35.5% (n=53) of patients were referred from the Hub, while 45.6% (n=67) and 18.8% (n=28) were from Spoke-1 and Spoke-2, respectively. 40% (n=59) received CEA within the recommended timeframe, and 15.4% (n=23) experienced a second ischemic event pre-surgery. Time from TIA clinic review to referral was 5.5±8 days and 16.4±20 days from vascular referral to surgery. Patterns of delays were observed, with Spoke-2 exhibiting the most significant delays. Notably, amaurosis fugax and embolic stroke correlated with recurrent ischemic events, emphasizing the importance of timely care in CEA. Conclusion Our study underscores the significant benefits and challenges of the Hub and Spoke model in vascular surgery. The growing referral delays from Spoke sites are concerning, emphasizing the need for a multi-disciplinary team approach within Spoke sites to ensure efficient and standardized care delivery., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Hakeem et al.)

Introduction The Perclose ProGlide and, more recently, MANTA Large-Bore Closure Device are commonly used vascular closure devices (VCDs) for managing large-bore vascular access haemostasis. The extent of calcification in the common femoral artery (CFA) plays a crucial role in choosing between these devices. ProGlide may face challenges with anterior calcification, while MANTA may have issues with posterior calcification. Our study compared their effectiveness, adjunct usage, calcification impact and early/late complications. Methods A retrospective analysis of procedures involving large-bore CFA access from 2017 to 2022 was conducted. Closure was grouped according to VCD as Group A (ProGlide) and Group B (MANTA). Calcification was designated as anterior and posterior and combined on pre-operative computed tomography angiography along 10 mm segments with 0.625 mm slice thickness. The success of haemostasis was graded as Grade 1 (haemostasis without adjuncts), Grade 2 (haemostasis with adjuncts) and Grade 3 (failed haemostasis needing rescue); Grades 1 and 2 were pooled as successful haemostasis. Statistical analysis was undertaken in Minitab 21 for Windows, particularly analysing calcification and its impact on the success of haemostasis. Results We evaluated 370 large-bore CFA accesses, distributed across two groups: Group A(64.9%, n=243) and Group B (35.1%, n=127), for a total of 205 endovascular procedures (93.1% (191) EVAR and 5.3% (11) TEVAR). The mean age was 74.9±8 years, predominantly males (88.2%, n=181). The average body mass index (BMI) was 28±5.8, with 20.9% (43) individuals having diabetes and 18.5% (37) current smokers. The mean sheath size OD was 16±2.5, with 4.5% (11) re-do groins in Group A and 6.2% (8) in Group B. Successful haemostasis was achieved in 91.8% (n=223) in Group A (44.8%, n=109 Grade 2) and 90.5% (n=115) in Group B (21%, n=27 Grade 2). Rescue operations were needed in 8.2% (20) in Group A and 9.1% (12) in Group B. Pseudoaneurysms developed more commonly in Grade 2 haemostasis with 9.9% (11) in Group A and 1.6% (2) in Group B (p=0.3). Anterior calcification was observed in 14.8% (36) in Group A and 18.8% (24) in Group B. In comparison, posterior calcification was present in 62.5% (152) in Group A and 66.9% (85) in Group B. Notably, calcification did not significantly impact haemostasis (p=0.79). Additional VCD deployment was necessary due to device failure in 4.5% (11) cases in Group A and 1.5% (2) cases in Group B. Conclusion The overall success rate was comparable between the two groups. However, Group A required more adjuncts to achieve successful haemostasis. The site of calcification did not impact the efficacy of closure devices. Pseudoaneurysm formation was more frequent when adjuncts were needed., Competing Interests: The authors have declared that no competing interests exist., (Copyright © 2023, Hakeem et al.)