A new technique combining the transverse resonance method with the singular integral equation technique is presented for the unified analysis of discontinuities occurring in the E-plane fin septa. Two shorting planes ...A new technique combining the transverse resonance method with the singular integral equation technique is presented for the unified analysis of discontinuities occurring in the E-plane fin septa. Two shorting planes are placed at some distances away from the discontinuity so as to form a closed resonator. According to the resonant condition, the equivalent circuit parameters for the discontinuity are expressed in terms of the distances between the shorting planes and the reference planes. The distances, in turn, are determined with the singular integral equation technique. A set of curves of the equivalent circuit parameters for the discontinuities are given. Based on the present analysis, the bandpass filters composed of unilateral and bilateral E-plane fin septa are designed and fabricated at Ka-band. The experimental results agree well with the theoretical predictions.展开更多
目的:探讨宫腔镜下子宫纵隔切除术(transcervical resection of septum,TCRS)对患者的妊娠及产科结局的影响。方法:2006年3月~2011年5月使用宫腔镜电切术治疗166例子宫纵隔患者。利用病历资料、手术记录及电话随访,分析术前、术后妊娠...目的:探讨宫腔镜下子宫纵隔切除术(transcervical resection of septum,TCRS)对患者的妊娠及产科结局的影响。方法:2006年3月~2011年5月使用宫腔镜电切术治疗166例子宫纵隔患者。利用病历资料、手术记录及电话随访,分析术前、术后妊娠结局并总结患者产科结局。结果:术中无严重并发症发生,术后首次妊娠距二探取环后最短1个月即妊娠,自然流产率从术前的64.53%降至术后的15.25%(P<0.01),活产率从术前的1.89%上升至术后的72.03%(P<0.01)。术后剖宫产率80%,无指征剖宫产达到总剖宫产数的41.12%,产后出血率23.53%,其中需要输血的占45%,1例先兆性子宫破裂。结论:宫腔镜下子宫纵隔切除术可以明显改善患者的妊娠结局,术后可尽快妊娠,加强孕期监督、分娩方式指导及预防产后出血发生可进一步改善其产科结局。展开更多
目的分析子宫中隔长度及基底宽度对妊娠的影响,探讨宫腔镜手术治疗不同状态中隔子宫的临床疗效。方法回顾性分析行宫腔镜子宫中隔切除术(TCRS)并有生育要求的随访资料完整的75例中隔子宫患者的临床资料,按中隔长度与宫深的关系〈1/...目的分析子宫中隔长度及基底宽度对妊娠的影响,探讨宫腔镜手术治疗不同状态中隔子宫的临床疗效。方法回顾性分析行宫腔镜子宫中隔切除术(TCRS)并有生育要求的随访资料完整的75例中隔子宫患者的临床资料,按中隔长度与宫深的关系〈1/3、1/3~2/3、≧2/3分为3组,按中隔基底宽度〈1cm、≥1cm分为两组,分别比较手术前后自然流产率及活产率。结果中隔长度〈1/3组、1/3-2/3组、≧2/3 3组间自然流产率分别为55.56%、88.00%和90.00%,差异有统计学意义(P〈0.05);子宫中隔长度≥1/3的自然:流产率(120/135,88.89%)显著高于中隔长度〈1/3者;术后与术前比较,3组的自然流产率均显著降低,活产率均显著升高,差异均有统计学意义(P〈0.05)。中隔基底宽度≥1cm者其自然流产率显著高于〈1cm者(88.39% VS 69.49%),活产率低于〈lcm者(10.71% VS 27.12%);手术后患者的自然流产率降低,活产率升高,差异有统计学意义(P〈0.05)。不同状态中隔子宫在行TCRS术后自然流产率、活产率组间比较,差异均无统计学意义(P〉0.05)。结论子宫中隔长度达到宫腔深度1/3或基底宽度达到lcm会显著增加自然流产率。TCRS术可明显改善妊娠结局,术前中隔子宫状态对术后妊娠结局无影响。展开更多
文摘A new technique combining the transverse resonance method with the singular integral equation technique is presented for the unified analysis of discontinuities occurring in the E-plane fin septa. Two shorting planes are placed at some distances away from the discontinuity so as to form a closed resonator. According to the resonant condition, the equivalent circuit parameters for the discontinuity are expressed in terms of the distances between the shorting planes and the reference planes. The distances, in turn, are determined with the singular integral equation technique. A set of curves of the equivalent circuit parameters for the discontinuities are given. Based on the present analysis, the bandpass filters composed of unilateral and bilateral E-plane fin septa are designed and fabricated at Ka-band. The experimental results agree well with the theoretical predictions.
文摘目的:探讨宫腔镜下子宫纵隔切除术(transcervical resection of septum,TCRS)对患者的妊娠及产科结局的影响。方法:2006年3月~2011年5月使用宫腔镜电切术治疗166例子宫纵隔患者。利用病历资料、手术记录及电话随访,分析术前、术后妊娠结局并总结患者产科结局。结果:术中无严重并发症发生,术后首次妊娠距二探取环后最短1个月即妊娠,自然流产率从术前的64.53%降至术后的15.25%(P<0.01),活产率从术前的1.89%上升至术后的72.03%(P<0.01)。术后剖宫产率80%,无指征剖宫产达到总剖宫产数的41.12%,产后出血率23.53%,其中需要输血的占45%,1例先兆性子宫破裂。结论:宫腔镜下子宫纵隔切除术可以明显改善患者的妊娠结局,术后可尽快妊娠,加强孕期监督、分娩方式指导及预防产后出血发生可进一步改善其产科结局。
文摘目的分析子宫中隔长度及基底宽度对妊娠的影响,探讨宫腔镜手术治疗不同状态中隔子宫的临床疗效。方法回顾性分析行宫腔镜子宫中隔切除术(TCRS)并有生育要求的随访资料完整的75例中隔子宫患者的临床资料,按中隔长度与宫深的关系〈1/3、1/3~2/3、≧2/3分为3组,按中隔基底宽度〈1cm、≥1cm分为两组,分别比较手术前后自然流产率及活产率。结果中隔长度〈1/3组、1/3-2/3组、≧2/3 3组间自然流产率分别为55.56%、88.00%和90.00%,差异有统计学意义(P〈0.05);子宫中隔长度≥1/3的自然:流产率(120/135,88.89%)显著高于中隔长度〈1/3者;术后与术前比较,3组的自然流产率均显著降低,活产率均显著升高,差异均有统计学意义(P〈0.05)。中隔基底宽度≥1cm者其自然流产率显著高于〈1cm者(88.39% VS 69.49%),活产率低于〈lcm者(10.71% VS 27.12%);手术后患者的自然流产率降低,活产率升高,差异有统计学意义(P〈0.05)。不同状态中隔子宫在行TCRS术后自然流产率、活产率组间比较,差异均无统计学意义(P〉0.05)。结论子宫中隔长度达到宫腔深度1/3或基底宽度达到lcm会显著增加自然流产率。TCRS术可明显改善妊娠结局,术前中隔子宫状态对术后妊娠结局无影响。