Background: Current techniques in partial auricular reconstruction can utilize an autologous or alloplastic framework covered by a variety of soft tissue envelopes. Objective: Is to evaluate the benefit of using polyp...Background: Current techniques in partial auricular reconstruction can utilize an autologous or alloplastic framework covered by a variety of soft tissue envelopes. Objective: Is to evaluate the benefit of using polypropylene mesh to reconstruct helix framework in partial auricular defects covered with local postauricular skin flap. Method: Eleven patients with partial auricular defect were treated by using polypropylene mesh helix framework which is covered with post auricular flap in a two stage repair;clinical results of the procedure were evaluated. Results: This technique achieved satisfactory results in 9 (81.8%) cases. Early Post operative complications: Hematoma formation in one case, mild infection in two cases, edema in two cases, and Partial overlying skin breakdown in one case with failure of technique. Late Post operative complications: Hypertrophic scar in one case, narrow retroauricular sulcus in one case, hair bearing skin over the auricle in one case. Conclusion: It is a simple technique, with satisfactory clinical results, easily done, even under local anesthesia, with no donor site morbidity of autogenous cartilage harvesting, not costly as other alloplastic substitutes, large series and longer follow up period are needed for better evaluation of this technique.展开更多
The following paper describes patch closure (bovine pericardial sheet) of an ostium primum atrial septal defect and mitral valve repair (sutured mitral valve cleft + autologous pericardial annuloplasty + Alfieri’s me...The following paper describes patch closure (bovine pericardial sheet) of an ostium primum atrial septal defect and mitral valve repair (sutured mitral valve cleft + autologous pericardial annuloplasty + Alfieri’s method) in a 50-year-old man. He had been perfectly well until he was brought to the emergency room because of acute heart failure. Chest radiography revealed right-side heart enlargement. Electrocardiography indicated atrial flutter. Echocardiography revealed a large ostium primum atrial septal defect and moderate mitral regurgitation. The pulmonary-to-systemic blood flow ratio was 3.24. First, cardiologists performed catheter ablation of the cavotricuspid isthmus for atrial flutter. We performed patch closure of an ostium primum atrial septal defect and mitral valve repair after the patient’s heart failure was under control. The patient was discharged 13 days postoperatively in a satisfactory condition without any critical complications.展开更多
特高频(ultra high frequency,UHF)局放检测是变压器油纸绝缘缺陷定位的常用方法,实际应用过程中局放定位准确性易受噪声和传感器布置方式影响。为保证变压器油纸绝缘缺陷局放定位检测有效性,文中首先建立油纸绝缘缺陷UHF局放定位检测平...特高频(ultra high frequency,UHF)局放检测是变压器油纸绝缘缺陷定位的常用方法,实际应用过程中局放定位准确性易受噪声和传感器布置方式影响。为保证变压器油纸绝缘缺陷局放定位检测有效性,文中首先建立油纸绝缘缺陷UHF局放定位检测平台,在常规K-means方法的基础上,提出基于修正聚类分界的变压器油纸绝缘缺陷局放抗干扰定位方法,有效降低了定位误差。然后针对样本聚类分界混叠问题,选择最优修正系数L为1.1时,UHF局放定位误差可减小至0.1 m内,验证了文中方法的有效性。最后分析不同传感器布置方式的定位误差变化规律,提出变压器油纸绝缘缺陷检测用UHF传感器优化布置方案,可为变压器局放在线监测传感器布置及定位提供参考。展开更多
A defect of chromatogram in a 35kV oil-immersed three-phase one-piece electric reactor in a 500kV substation。The initial analysis suggests that the defect is caused by the loose connection of the iron core magnet shi...A defect of chromatogram in a 35kV oil-immersed three-phase one-piece electric reactor in a 500kV substation。The initial analysis suggests that the defect is caused by the loose connection of the iron core magnet shield (magnet shield layer of iron core or earthling top). Examination of winding DC resistance, DGA and other relevant examinations were carried out to investigate the defect reasons., which is demonstrated by the dismantlement. In-depth study is taken and corresponding prevention measures are put forward in the paper.展开更多
文摘Background: Current techniques in partial auricular reconstruction can utilize an autologous or alloplastic framework covered by a variety of soft tissue envelopes. Objective: Is to evaluate the benefit of using polypropylene mesh to reconstruct helix framework in partial auricular defects covered with local postauricular skin flap. Method: Eleven patients with partial auricular defect were treated by using polypropylene mesh helix framework which is covered with post auricular flap in a two stage repair;clinical results of the procedure were evaluated. Results: This technique achieved satisfactory results in 9 (81.8%) cases. Early Post operative complications: Hematoma formation in one case, mild infection in two cases, edema in two cases, and Partial overlying skin breakdown in one case with failure of technique. Late Post operative complications: Hypertrophic scar in one case, narrow retroauricular sulcus in one case, hair bearing skin over the auricle in one case. Conclusion: It is a simple technique, with satisfactory clinical results, easily done, even under local anesthesia, with no donor site morbidity of autogenous cartilage harvesting, not costly as other alloplastic substitutes, large series and longer follow up period are needed for better evaluation of this technique.
文摘The following paper describes patch closure (bovine pericardial sheet) of an ostium primum atrial septal defect and mitral valve repair (sutured mitral valve cleft + autologous pericardial annuloplasty + Alfieri’s method) in a 50-year-old man. He had been perfectly well until he was brought to the emergency room because of acute heart failure. Chest radiography revealed right-side heart enlargement. Electrocardiography indicated atrial flutter. Echocardiography revealed a large ostium primum atrial septal defect and moderate mitral regurgitation. The pulmonary-to-systemic blood flow ratio was 3.24. First, cardiologists performed catheter ablation of the cavotricuspid isthmus for atrial flutter. We performed patch closure of an ostium primum atrial septal defect and mitral valve repair after the patient’s heart failure was under control. The patient was discharged 13 days postoperatively in a satisfactory condition without any critical complications.
文摘特高频(ultra high frequency,UHF)局放检测是变压器油纸绝缘缺陷定位的常用方法,实际应用过程中局放定位准确性易受噪声和传感器布置方式影响。为保证变压器油纸绝缘缺陷局放定位检测有效性,文中首先建立油纸绝缘缺陷UHF局放定位检测平台,在常规K-means方法的基础上,提出基于修正聚类分界的变压器油纸绝缘缺陷局放抗干扰定位方法,有效降低了定位误差。然后针对样本聚类分界混叠问题,选择最优修正系数L为1.1时,UHF局放定位误差可减小至0.1 m内,验证了文中方法的有效性。最后分析不同传感器布置方式的定位误差变化规律,提出变压器油纸绝缘缺陷检测用UHF传感器优化布置方案,可为变压器局放在线监测传感器布置及定位提供参考。
文摘A defect of chromatogram in a 35kV oil-immersed three-phase one-piece electric reactor in a 500kV substation。The initial analysis suggests that the defect is caused by the loose connection of the iron core magnet shield (magnet shield layer of iron core or earthling top). Examination of winding DC resistance, DGA and other relevant examinations were carried out to investigate the defect reasons., which is demonstrated by the dismantlement. In-depth study is taken and corresponding prevention measures are put forward in the paper.
