• Kennedy Burns opublikował 1 rok, 8 miesięcy temu

    2 vs. 3.6), although initial symptoms occurred at a similar age (median age 6.1 vs. 7.6 years). Urinary oxalate did not differ between these groups. The estimated glomerular filtration rate at diagnosis and its decline over time were similar for the two groups. Altogether, five of 45 in family screening and 67 of 300 of clinical suspicion individuals developed end stage kidney disease at last follow-up. Thus, patients with primary hyperoxaluria identified through family screening have significant disease despite no outward clinical suspicion at diagnosis. Since promising novel treatments are emerging, genetic screening of family members is warranted because they are at significant risk for disease progression. OBJECTIVE The outcomes of subclavian artery revascularization (SAR) have been examined extensively in the setting of atherosclerotic occlusive disease but have been poorly characterized in the setting of thoracic endovascular aortic repair (TEVAR). As trials for branched thoracic endovascular stent grafts materialize, the outcomes of the subclavian artery branched prosthesis will need to be compared with TEVAR with SAR by carotid-subclavian bypass or subclavian transposition. METHODS A database of 1516 patients undergoing TEVAR from 2000 to 2015 was queried. Of those undergoing TEVAR, 19% (282 patients) also underwent SAR. Patient demographics, TEVAR indication, 30-day morbidity and mortality, and midterm patency and survival were analyzed. RESULTS During the study period, 282 patients underwent 288 SARs in the setting of TEVAR. A total of 269 (93%) carotid-subclavian bypasses and 19 (7%) subclavian artery transpositions were performed; 76% of the SARs occurred before TEVAR, 14% occurred concurrently with TEVated with low morbidity, durable long-term patency, and infrequent need for reintervention. OBJECTIVE Vascular conduit is essential for arterial reconstruction for a number of conditions, including trauma and atherosclerotic occlusive disease. We have developed a tissue-engineered human acellular vessel (HAV) that can be manufactured, stored on site at hospitals, and be immediately available for arterial vascular reconstruction. Although the HAV is acellular when implanted, extensive preclinical and clinical testing has demonstrated that the HAV subsequently repopulates with the recipient’s own vascular cells. We report a first-in-man clinical experience using the HAV for arterial reconstruction in patients with symptomatic peripheral arterial disease. METHODS HAVs were manufactured using human vascular smooth muscle cells grown on a biodegradable scaffold. After the establishment of adequate cell growth and extracellular matrix deposition, the vessels were decellularized to remove human cellular antigens. Manufactured vessels were implanted in 20 patients with symptomatic peripheral arterial diseasterial bypass surgery. Early clinical experience with these vessels, in the arterial position, suggest that they are safe, have acceptable patency, a low incidence of infection, and do not require the harvest of autologous vein or any cells from the recipient. Histologic examination of tissue biopsies revealed vascular remodeling and repopulation by host cells. This first-in-man arterial bypass study supports the continued development of human tissue engineered blood vessels for arterial reconstruction, and potential future expansion to clinical indications including vascular trauma and repair of other size-appropriate peripheral arteries. OBJECTIVE There is a growing body of literature raising concerns about the long-term durability of endovascular aneurysm repair (EVAR) for abdominal aortic aneurysms (AAAs), suggesting that long-term outcomes may be better after open AAA repair. However, the data investigating these long-term outcomes largely originate from early in the endovascular era and therefore do not account for increasing clinical experience and technologic improvements. We investigated whether 4-year outcomes after EVAR and open repair have improved over time. METHODS We identified all EVARs and open repairs for intact infrarenal AAA within the Vascular Quality Initiative database (2003-2018). We then stratified patients by procedure year into treatment cohorts of four years 2003-2006, 2007-2010, 2011-2014, and 2015-2018. We used Kaplan-Meier analysis and Cox proportional hazards models to assess whether the survival after EVAR or open repair changed over time. In addition, we propensity matched EVAR and open repairs for each time co, in matched EVAR and open repairs, there was no difference in mortality in the first three cohorts, whereas the hazard of mortality was lower for the 2015-2018 cohort (HR, 0.65; 95% CI, 0.51-0.84; P = .001). CONCLUSIONS Four-year survival improved in more recent years after EVAR but not after open repair. This finding suggests that midterm outcomes after EVAR are improving, perhaps because of technologic improvements and increased experience, information that should be considered by surgeons and policymakers alike in evaluating the value of contemporary EVAR and open AAA repair. OBJECTIVE The goal of this study was to analyze our 10-year experience in the treatment of aneurysms of the collateral circulation secondary to steno-occlusions of the celiac trunk (CT) or superior mesenteric artery (SMA). METHODS In the last 10 years, 32 celiac-mesenteric aneurysms were detected (25 true aneurysms and seven pseudoaneurysms) in 25 patients with steno-occlusion of the CT or SMA. All cases were diagnosed and treated at our center, with either surgical or endovascular approach. As open surgery, we performed aneurysmectomy and revascularization; as endovascular treatment we performed both the embolization (or graft exclusion) of the aneurysm sac, and embolization of afferent and efferent arteries. RESULTS Sixteen patients (64%) underwent endovascular treatment, accounting for 66% of aneurysms (21/32). Six patients (24%) and seven associated aneurysms (22%) underwent open surgery. Three asymptomatic patients (12%), representing a total of four aneurysms (12%), were not treated. For endovascular preutic approach based on the clinical condition at the time of diagnosis and specific vascular anatomy. OBJECTIVE Our study aimed to perform a meta-analysis based on current evidence to investigate the efficacy of different debulking devices in the treatment of femoropopliteal in-stent restenosis (FP-ISR). METHODS We systematically searched for articles reporting treatment of FP-ISR patients in the MEDLINE, Embase, and Cochrane databases. Randomized controlled trials, cohort studies, and retrospective studies were included, and clinical characteristic outcomes were extracted and pooled. The efficacy end points included primary patency and freedom from target lesion revascularization (TLR) at 1 year. Pooled estimates were calculated using the random effects model. For each point, effect size and 95% confidence intervals (CIs) were calculated. RESULTS We identified 12 studies with 743 patients that could be included in this meta-analysis. The overall primary patency at 1 year was 58.3% (95% CI, 44.7%-71.9%), and freedom from TLR at 1 year was 67.0% (95% CI, 60.5%-74.6%). Subgroup analysis showed that the laser debulking + percutaneous transluminal angioplasty (PTA) group was associated with a similar primary patency and freedom from TLR compared with the mechanical debulking + PTA group (53.8% vs 52.8; 65.4% vs 62.1%). Subgroup analysis demonstrated that the long lesion and short lesion groups and the occlusive and stenosis groups shared similar results of primary patency and freedom from TLR. Laser + drug-coated balloon was associated with higher primary patency and freedom from TLR compared with laser + PTA (78.5% vs 58.3%; 76.7% vs 66.4%). CONCLUSIONS Debulking devices show promising and favorable results for FP-ISR patients with complex lesions. Debulking devices combined with a drug-coated balloon might be an efficacious way to treat FP-ISR complex lesions in the future. OBJECTIVE Abdominal aortic aneurysm (AAA) is a life-threatening disease, and the only curative treatment relies on open or endovascular repair. The decision to treat relies on the evaluation of the risk of AAA growth and rupture, which can be difficult to assess in practice. Artificial intelligence (AI) has revealed new insights into the management of cardiovascular diseases, but its application in AAA has so far been poorly described. The aim of this review was to summarize the current knowledge on the potential applications of AI in patients with AAA. METHODS A comprehensive literature review was performed. The MEDLINE database was searched according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. The search strategy used a combination of keywords and included studies using AI in patients with AAA published between May 2019 and January 2000. Two authors independently screened titles and abstracts and performed data extraction. The search of published literature identifi and to plan the postoperative follow-up. AI represents an attractive tool for decision-making and may facilitate development of personalized therapeutic approaches for patients with AAA. OBJECTIVE Increasing experience and improving technology have led to the expansion of endovascular aneurysm repair (EVAR) for ruptured abdominal aortic aneurysms (AAA). We investigated whether the 5-year survival after both EVAR and open repair for ruptured AAA changed over the last 14 years. METHODS We identified repairs for ruptured infrarenal AAA within the Vascular Quality Initiative registry between 2004 and 2018. We compared the 5-year survival of both EVAR and open repair between the early (2004-2012) and late (2013-2018) cohorts. In addition, we compared EVAR with open repair in the early and late cohorts. We used propensity score modeling to create matching cohorts for each analysis. Kaplan-Meier analysis was used to estimate survival proportions and univariate Cox proportional hazards analysis was used to compare differences in hazard of mortality in the matched cohorts. RESULTS We identified 4638 ruptured AAA repairs. This included 409 EVARs in the early cohort and 2250 in the late cohort, as well over time, whereas survival after open repair remained constant. Consequently, the relative survival benefit of EVAR over open repair has increased over time, which should encourage further adoption of EVAR for ruptured AAA. A passive three-dimensional model of the human cochlea is described and analysed in the present article. One of its features is the implementation of a thermo-viscous boundary layer as a physically approved mechanism of mechanical damping. The model is solved numerically with the finite element method in ANSYS® and the simulation results are analysed with the help of MATLAB®. In this way curves of the basilar membrane’s amplitude, phase and velocity for frequencies between 1000Hz and 8000Hz are calculated. A traveling wave develops on the basilar membrane and is damped after reaching its frequency-dependent maximum due to the boundary layer damping. A plot of the frequency-to-space transformation can be obtained which fits to the experimental data found in the literature. Furthermore, the study shows an energy analysis of the simulation verifying the boundary layer damping as a relevant physical effect for 3D-models of the cochlea.

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