目的观察三联法治疗难治性宫缩乏力性产后出血的临床疗效。方法将51例剖宫产术中发生难治性宫缩乏力性产后出血患者随机分为观察组31例和对照组20例。观察组术中给予三联法治疗,即0~4℃冰盐水冷敷子宫,子宫动脉上行支结扎,子宫背带缝合...目的观察三联法治疗难治性宫缩乏力性产后出血的临床疗效。方法将51例剖宫产术中发生难治性宫缩乏力性产后出血患者随机分为观察组31例和对照组20例。观察组术中给予三联法治疗,即0~4℃冰盐水冷敷子宫,子宫动脉上行支结扎,子宫背带缝合术;对照组采用宫腔纱布填塞治疗。结果治疗后观察组术后24 h出血≤100 ml 14例,-200 ml 13例,-300 ml 3例,-400 ml 0例,-500 ml 1例,〉500 ml 0例;对照组分别为0、4、4、3、2、7例。两组比较,P〈0.01。观察组无子宫切除者;对照组4例改行三联法治疗成功,3例行子宫切除术。两组术后均无感染、子宫坏死、肠梗阻等并发症;术后6周彩超检查均示子宫恢复良好,随访月经复潮无异常。结论三联法治疗难治性宫缩乏力性产后出血安全有效。展开更多
The combination of different nanostructures can hinder phonons transmission in a wide frequency range and further reduce the thermal conductivity(TC).This will benefit the improvement and application of thermoelectric...The combination of different nanostructures can hinder phonons transmission in a wide frequency range and further reduce the thermal conductivity(TC).This will benefit the improvement and application of thermoelectric conversion,insulating materials and thermal barrier coatings,etc.In this work,the effects of nanopillars and Ge nanoparticles(GNPs)on the thermal transport of Si nanowire(SN)are investigated by nonequilibrium molecular dynamics(NEMD)simulation.By analyzing phonons transport behaviors,it is confirmed that the introduction of nanopillars leads to the occurrence of lowfrequency phonons resonance,and nanoparticles enhance high-frequency phonons interface scattering and localization.The results show that phonons transport in the whole frequency range can be strongly hindered by the simultaneous introduction of nanopillars and nanoparticles.In addition,the effects of system length,temperature,sizes and numbers of nanoparticles on the TC are investigated.Our work provides useful insights into the effective regulation of the TC of nanomaterials.展开更多
文摘目的观察三联法治疗难治性宫缩乏力性产后出血的临床疗效。方法将51例剖宫产术中发生难治性宫缩乏力性产后出血患者随机分为观察组31例和对照组20例。观察组术中给予三联法治疗,即0~4℃冰盐水冷敷子宫,子宫动脉上行支结扎,子宫背带缝合术;对照组采用宫腔纱布填塞治疗。结果治疗后观察组术后24 h出血≤100 ml 14例,-200 ml 13例,-300 ml 3例,-400 ml 0例,-500 ml 1例,〉500 ml 0例;对照组分别为0、4、4、3、2、7例。两组比较,P〈0.01。观察组无子宫切除者;对照组4例改行三联法治疗成功,3例行子宫切除术。两组术后均无感染、子宫坏死、肠梗阻等并发症;术后6周彩超检查均示子宫恢复良好,随访月经复潮无异常。结论三联法治疗难治性宫缩乏力性产后出血安全有效。
基金Project supported by the National Natural Science Foundation of China (Grant No.52076080)the Natural Science Foundation of Hebei Province of China (Grant No.E2020502011)。
文摘The combination of different nanostructures can hinder phonons transmission in a wide frequency range and further reduce the thermal conductivity(TC).This will benefit the improvement and application of thermoelectric conversion,insulating materials and thermal barrier coatings,etc.In this work,the effects of nanopillars and Ge nanoparticles(GNPs)on the thermal transport of Si nanowire(SN)are investigated by nonequilibrium molecular dynamics(NEMD)simulation.By analyzing phonons transport behaviors,it is confirmed that the introduction of nanopillars leads to the occurrence of lowfrequency phonons resonance,and nanoparticles enhance high-frequency phonons interface scattering and localization.The results show that phonons transport in the whole frequency range can be strongly hindered by the simultaneous introduction of nanopillars and nanoparticles.In addition,the effects of system length,temperature,sizes and numbers of nanoparticles on the TC are investigated.Our work provides useful insights into the effective regulation of the TC of nanomaterials.
