目的探讨肩难产产妇采用旋后肩法助产对产后盆底肌功能短期改善效果及对盆底肌形态变化、母婴并发症等指标的影响。方法回顾性分析2022年3月至2024年8月石家庄市妇幼保健院收治的74例肩难产产妇的临床资料,进行旋后肩法助产的38例为观察...目的探讨肩难产产妇采用旋后肩法助产对产后盆底肌功能短期改善效果及对盆底肌形态变化、母婴并发症等指标的影响。方法回顾性分析2022年3月至2024年8月石家庄市妇幼保健院收治的74例肩难产产妇的临床资料,进行旋后肩法助产的38例为观察组,进行耻骨联合上加压法助产的36例为对照组。比较两组新生儿1 min阿氏(Apgar)评分、出肩时间、新生儿并发症、产妇并发症、盆底表面肌电图检测结果、健康状况评分。结果观察组新生儿1 min Apgar评分高于对照组[(9.32±0.70)分vs(7.89±1.24)分,t=6.064,P<0.01],出肩时间短于对照组[(99.65±15.46)s vs(114.41±16.74)s,t=3.939,P<0.01]。观察组新生儿并发症和产妇软产道损伤、产后出血、子宫破裂、产褥感染发生率低于对照组(P<0.05)。产妇盆底表面肌电图检测结果显示,两组耐力肌收缩最大值比较差异无统计学意义(P>0.05),观察组前基线值、后基线值、快肌收缩最大值、混合肌收缩平均值、混合肌收缩最大值、耐力肌收缩平均值均优于对照组(P<0.05)。观察组健康状况评分中的社会功能、情感职能、生理机能和生理职能评分高于对照组(P<0.05)。结论旋后肩法助产用于肩难产产妇,效果显著,可快速、安全地娩出胎肩,降低新生儿窒息率,减少产妇产后出血、软产道损伤的发生,改善短期内盆底肌功能,从而保障母婴安全。展开更多
For friction stir welding （FSW）, a new idea is put forward in this paper to weld the thin plate of Al alloy by using the rotational tool without pin. The experiments of FSW are carried out by using the tools with in...For friction stir welding （FSW）, a new idea is put forward in this paper to weld the thin plate of Al alloy by using the rotational tool without pin. The experiments of FSW are carried out by using the tools with inner-concave-flute shoulder, concentric-circles-flute shoulder and three-spiral-flute shoulder, respectively. The experimental results show that the grain size in weld nugget zone attained by the tool with three-spiral-flute shoulder is nearly the same while the grain sizes decrease with the decrease of welding velocity. The displacement of material flow in the heat-mechanical affected zone by the tool with three-spiral-flute shoulder is much larger than that by the tool with inner-concave-flute shoulder or concentric-circles–flute shoulder. The above-mentioned results are verified by numerical simulation. For the tool with three-spiral-flute shoulder, the tensile strength of FSW joint increases with the decrease of welding velocity while the value of tensile strength attained by the welding velocity of 20 mm/min and the rotation speed of 1800 r/min is about 398 MPa, which is 80% more than that of parent mental tensile strength. Those verify that the tool with three-spiral-flute shoulder can be used to join the thin plate of Al alloy.展开更多
文摘目的探讨肩难产产妇采用旋后肩法助产对产后盆底肌功能短期改善效果及对盆底肌形态变化、母婴并发症等指标的影响。方法回顾性分析2022年3月至2024年8月石家庄市妇幼保健院收治的74例肩难产产妇的临床资料,进行旋后肩法助产的38例为观察组,进行耻骨联合上加压法助产的36例为对照组。比较两组新生儿1 min阿氏(Apgar)评分、出肩时间、新生儿并发症、产妇并发症、盆底表面肌电图检测结果、健康状况评分。结果观察组新生儿1 min Apgar评分高于对照组[(9.32±0.70)分vs(7.89±1.24)分,t=6.064,P<0.01],出肩时间短于对照组[(99.65±15.46)s vs(114.41±16.74)s,t=3.939,P<0.01]。观察组新生儿并发症和产妇软产道损伤、产后出血、子宫破裂、产褥感染发生率低于对照组(P<0.05)。产妇盆底表面肌电图检测结果显示,两组耐力肌收缩最大值比较差异无统计学意义(P>0.05),观察组前基线值、后基线值、快肌收缩最大值、混合肌收缩平均值、混合肌收缩最大值、耐力肌收缩平均值均优于对照组(P<0.05)。观察组健康状况评分中的社会功能、情感职能、生理机能和生理职能评分高于对照组(P<0.05)。结论旋后肩法助产用于肩难产产妇,效果显著,可快速、安全地娩出胎肩,降低新生儿窒息率,减少产妇产后出血、软产道损伤的发生,改善短期内盆底肌功能,从而保障母婴安全。
文摘For friction stir welding （FSW）, a new idea is put forward in this paper to weld the thin plate of Al alloy by using the rotational tool without pin. The experiments of FSW are carried out by using the tools with inner-concave-flute shoulder, concentric-circles-flute shoulder and three-spiral-flute shoulder, respectively. The experimental results show that the grain size in weld nugget zone attained by the tool with three-spiral-flute shoulder is nearly the same while the grain sizes decrease with the decrease of welding velocity. The displacement of material flow in the heat-mechanical affected zone by the tool with three-spiral-flute shoulder is much larger than that by the tool with inner-concave-flute shoulder or concentric-circles–flute shoulder. The above-mentioned results are verified by numerical simulation. For the tool with three-spiral-flute shoulder, the tensile strength of FSW joint increases with the decrease of welding velocity while the value of tensile strength attained by the welding velocity of 20 mm/min and the rotation speed of 1800 r/min is about 398 MPa, which is 80% more than that of parent mental tensile strength. Those verify that the tool with three-spiral-flute shoulder can be used to join the thin plate of Al alloy.
