Two cases with a pancreaticoduodenal arterial aneurysm accompanied with superior mesenteric artery(SMA) stenosis were previously described and both were treated surgically.However,for interventional treatment,securing...Two cases with a pancreaticoduodenal arterial aneurysm accompanied with superior mesenteric artery(SMA) stenosis were previously described and both were treated surgically.However,for interventional treatment,securing a sufficient blood supply to the SMA should be a priority of treatment.We present the case of a 71-year-old male with a 20 mm diameter pancreaticoduodenal arterial aneurysm accompanied by SMA stenosis at its origin.The guidewire traverse from SMA to the aneurysm was difficult because of the tight SMA stenosis;however,the guidewire traverse from the celiac artery was finally successful and was followed by balloon angioplasty using a pull-through technique,leading to stent placement.Thereafter,coil packing through the SMA achieved eradication of the aneurysm without bowel ischemia.At the last follow-up computed tomography 8 mo later,no recurrence of the aneurysm was confirmed.The pull-through technique was useful for angioplasty for tight SMA stenosis in this case.展开更多
[目的]核电厂汽水管线一般在管道外壁加装保温层,从而提高换热效率。目前对于铁磁性管道的检测手段主要为常规超声及超声导波,检测前需要将管道外壁保温层拆除,导致检测工期延长,人力成本增加,无法达到核电厂高质量发展的要求。核电厂...[目的]核电厂汽水管线一般在管道外壁加装保温层,从而提高换热效率。目前对于铁磁性管道的检测手段主要为常规超声及超声导波,检测前需要将管道外壁保温层拆除,导致检测工期延长,人力成本增加,无法达到核电厂高质量发展的要求。核电厂脉冲涡流技术的应用可以省去保温层的拆装,实现不停机在线筛查。检测线圈的放置方式对缺陷的检出能力是脉冲涡流技术重要指标。[方法]文章利用ANSYS中的Maxwell模块进行管件建模及仿真,分别设计同轴式与垂直式检测线圈,保持提离距离、材料一致及其他条件一致下,模拟脉冲涡流对平底缺陷的检测能力。选取核电厂样管进行同轴式与垂直式脉冲涡流测试,将脉冲涡流(Pulsed Eddy Current Testing,PECT)测试结果与超声测厚进行复核,对比两种线圈放置方式对脉冲涡流检测的影响。[结果]研究表明:垂直式线圈相对于同轴式线圈对缺陷检出效果更佳。[结论]核电厂脉冲涡流技术的应用对脉冲涡流技术在核电领域实施具有重要意义。展开更多
Background:Early treatment for patients with aneurysmal subarachnoid hemorrhage(aSAH)could significantly reduce the risk of re-bleeding and improve clinical outcomes.We assessed the different time intervals from the i...Background:Early treatment for patients with aneurysmal subarachnoid hemorrhage(aSAH)could significantly reduce the risk of re-bleeding and improve clinical outcomes.We assessed the different time intervals from the initial hemorrhage,admission,and endovascular treatment and identified the risk factors contributing to delay.Methods:Between February 2017 and December 2019,422 consecutive aSAH patients treated in a high-volume hospital were collected and reviewed.Risk factors contributing to admission delay and treatment delay were analyzed with univariate and multivariate analysis.Results:One hundred twenty-two(28.9%)were admitted to the high-volume hospital at the day of symptom onset and 386(91.5%)were treated with endovascular management at the same day of admission.The multivariate analysis found that younger age(P=0.022,OR=0.981,95%CI 0.964–0.997)and good Fisher score(P=0.002,OR=0.420,95%CI 0.245–0.721)were independent risk factors of admission delay.None was found to be related with treatment delay.Multivariate analysis(OR(95%CI))showed that higher age 1.027(1.004–1.050),poorer Fisher score 3.496(1.993–6.135),larger aneurysmal size 1.112(1.017–1.216),and shorter interval between onset to admission 1.845(1.018–3.344)were independent risk factors of poorer clinical outcome.Conclusion:Treatment delay was mainly caused by pre-hospital delay including delayed admission and delayed transfer.Our experience showed that cerebrovascular team could provide early treatment for aSAH patients.Younger age and good Fisher score were significantly related with admission delay.However,admission delay was further significantly correlated with better clinical outcome.展开更多
文摘Two cases with a pancreaticoduodenal arterial aneurysm accompanied with superior mesenteric artery(SMA) stenosis were previously described and both were treated surgically.However,for interventional treatment,securing a sufficient blood supply to the SMA should be a priority of treatment.We present the case of a 71-year-old male with a 20 mm diameter pancreaticoduodenal arterial aneurysm accompanied by SMA stenosis at its origin.The guidewire traverse from SMA to the aneurysm was difficult because of the tight SMA stenosis;however,the guidewire traverse from the celiac artery was finally successful and was followed by balloon angioplasty using a pull-through technique,leading to stent placement.Thereafter,coil packing through the SMA achieved eradication of the aneurysm without bowel ischemia.At the last follow-up computed tomography 8 mo later,no recurrence of the aneurysm was confirmed.The pull-through technique was useful for angioplasty for tight SMA stenosis in this case.
文摘[目的]核电厂汽水管线一般在管道外壁加装保温层,从而提高换热效率。目前对于铁磁性管道的检测手段主要为常规超声及超声导波,检测前需要将管道外壁保温层拆除,导致检测工期延长,人力成本增加,无法达到核电厂高质量发展的要求。核电厂脉冲涡流技术的应用可以省去保温层的拆装,实现不停机在线筛查。检测线圈的放置方式对缺陷的检出能力是脉冲涡流技术重要指标。[方法]文章利用ANSYS中的Maxwell模块进行管件建模及仿真,分别设计同轴式与垂直式检测线圈,保持提离距离、材料一致及其他条件一致下,模拟脉冲涡流对平底缺陷的检测能力。选取核电厂样管进行同轴式与垂直式脉冲涡流测试,将脉冲涡流(Pulsed Eddy Current Testing,PECT)测试结果与超声测厚进行复核,对比两种线圈放置方式对脉冲涡流检测的影响。[结果]研究表明:垂直式线圈相对于同轴式线圈对缺陷检出效果更佳。[结论]核电厂脉冲涡流技术的应用对脉冲涡流技术在核电领域实施具有重要意义。
基金supported by the National Key Research and Development Program of China(grant No:2016YFC1300703).
文摘Background:Early treatment for patients with aneurysmal subarachnoid hemorrhage(aSAH)could significantly reduce the risk of re-bleeding and improve clinical outcomes.We assessed the different time intervals from the initial hemorrhage,admission,and endovascular treatment and identified the risk factors contributing to delay.Methods:Between February 2017 and December 2019,422 consecutive aSAH patients treated in a high-volume hospital were collected and reviewed.Risk factors contributing to admission delay and treatment delay were analyzed with univariate and multivariate analysis.Results:One hundred twenty-two(28.9%)were admitted to the high-volume hospital at the day of symptom onset and 386(91.5%)were treated with endovascular management at the same day of admission.The multivariate analysis found that younger age(P=0.022,OR=0.981,95%CI 0.964–0.997)and good Fisher score(P=0.002,OR=0.420,95%CI 0.245–0.721)were independent risk factors of admission delay.None was found to be related with treatment delay.Multivariate analysis(OR(95%CI))showed that higher age 1.027(1.004–1.050),poorer Fisher score 3.496(1.993–6.135),larger aneurysmal size 1.112(1.017–1.216),and shorter interval between onset to admission 1.845(1.018–3.344)were independent risk factors of poorer clinical outcome.Conclusion:Treatment delay was mainly caused by pre-hospital delay including delayed admission and delayed transfer.Our experience showed that cerebrovascular team could provide early treatment for aSAH patients.Younger age and good Fisher score were significantly related with admission delay.However,admission delay was further significantly correlated with better clinical outcome.
