目的:对比研究容量目标通气、高频振荡通气两种模式在新生儿呼吸窘迫综合征中的治疗效果。方法:随机将2021年6月—2023年6月在湛江市妇幼保健计划生育服务中心治疗的新生儿呼吸窘迫综合征患儿100例分为对照组与研究组,每组50例。研究组...目的:对比研究容量目标通气、高频振荡通气两种模式在新生儿呼吸窘迫综合征中的治疗效果。方法:随机将2021年6月—2023年6月在湛江市妇幼保健计划生育服务中心治疗的新生儿呼吸窘迫综合征患儿100例分为对照组与研究组,每组50例。研究组采取高频振荡通气模式(高频机械通气+目标潮气量),对照组采取容量目标通气模式。对比两组动脉血气指标、并发症发生率、死亡率、有创通气时间、氧疗时间、住院时间。结果:研究组有创通气时间、氧疗时间、住院时间均短于对照组(P<0.05)。两组死亡率(0 vs 8.00%)比较,差异无统计学意义(P>0.05)。干预前两组血氧分压、血氧饱和度、pH值、二氧化碳分压比较,差异均无统计学意义(P>0.05);干预48 h后,研究组的血氧分压、血氧饱和度、pH值较干预前和对照组均更高,二氧化碳分压较干预前和对照组更低(P<0.05)。研究组的并发症发生率(10.00%)低于对照组(36.96%)(P<0.05)。结论:高频振荡通气模式可以更有效地改善新生儿呼吸窘迫综合征患儿动脉血气指标,缩短康复时间,减少各类并发症出现。展开更多
目的:分析早产儿视网膜病变的转归情况及其进展至重度的危险因素。方法:选取2016年1月-2019年6月本院95例视网膜病变早产儿为研究对象。随访6个月,观察所有患儿的转归情况,比较不同新生儿因素(性别、胎龄、体重、1 min Apgar评分、感染...目的:分析早产儿视网膜病变的转归情况及其进展至重度的危险因素。方法:选取2016年1月-2019年6月本院95例视网膜病变早产儿为研究对象。随访6个月,观察所有患儿的转归情况,比较不同新生儿因素(性别、胎龄、体重、1 min Apgar评分、感染情况及先天性疾病情况)及其他因素(机械通气时间、母亲妊娠期疾病情况、肺表面活性物质应用情况及分娩方式)者的转归情况,并分析早产儿视网膜病变进展至重度的危险因素。结果:95例早产儿中进展至重度者30例(31.58%),自然消退者65例(68.42%)。不同性别、先天性疾病、母亲妊娠期疾病、肺表面活性物质应用情况及分娩方式的早产儿转归情况比较,差异均无统计学意义(P>0.05),而不同胎龄、体重、1 min Apgar评分、感染情况及机械通气时间的早产儿转归情况比较,差异均有统计学意义(P<0.05);多因素logistic回归分析显示,胎龄、体重、1 min Apgar评分、感染情况及机械通气时间均为早产儿视网膜病变进展至重度的危险因素(P<0.05)。结论:早产儿视网膜病变进展至重度的概率较高。胎龄、体重、1 min Apgar评分、感染情况及机械通气时间均为早产儿视网膜病变进展至重度的危险因素,可作为防控与干预措施制定的参考依据。展开更多
The effect of mixed oxide support on the performance of Ni/ZnO in the reactive adsorption desulfurization(RADS) reaction was investigated in a fixed bed reactor by using thiophene as the sulfur-containing compound in ...The effect of mixed oxide support on the performance of Ni/ZnO in the reactive adsorption desulfurization(RADS) reaction was investigated in a fixed bed reactor by using thiophene as the sulfur-containing compound in the model gasoline. A series of oxide supports for Ni/ZnO were synthesized by the co-precipitation method and characterized by XRD, N_2-adsorption, TPR and NH_3-TPD techniques. It was found that the desulfurization capacity of Ni/ZnO was enhanced greatly when active components were supported on the proper mixed oxide. Ni/ZnO supported on oxides exhibited much higher desulfurization efficiency and sulfur adsorption capacity than the unsupported Ni/ZnO and the synthesized Ni/ZnO-SA adsorbent exhibited the highest efficiency for thiophene removal. The higher desulfurization activity and sulfur capacity of Ni/ZnO supported on SiO_2-Al_2O_3 with small particle size, high specific surface area and large pore volume could promote the high dispersion of active metal phase and the transfer of sulfur to ZnO with lower mass transfer resistance. γ-Al_2O_3 species could weaken the interaction of active phases and SiO_2 as well as could increase greatly the amount of weak acids. Therefore, these oxides could impose a great influence on the structure and chemical properties of the catalyst.展开更多
文摘目的:对比研究容量目标通气、高频振荡通气两种模式在新生儿呼吸窘迫综合征中的治疗效果。方法:随机将2021年6月—2023年6月在湛江市妇幼保健计划生育服务中心治疗的新生儿呼吸窘迫综合征患儿100例分为对照组与研究组,每组50例。研究组采取高频振荡通气模式(高频机械通气+目标潮气量),对照组采取容量目标通气模式。对比两组动脉血气指标、并发症发生率、死亡率、有创通气时间、氧疗时间、住院时间。结果:研究组有创通气时间、氧疗时间、住院时间均短于对照组(P<0.05)。两组死亡率(0 vs 8.00%)比较,差异无统计学意义(P>0.05)。干预前两组血氧分压、血氧饱和度、pH值、二氧化碳分压比较,差异均无统计学意义(P>0.05);干预48 h后,研究组的血氧分压、血氧饱和度、pH值较干预前和对照组均更高,二氧化碳分压较干预前和对照组更低(P<0.05)。研究组的并发症发生率(10.00%)低于对照组(36.96%)(P<0.05)。结论:高频振荡通气模式可以更有效地改善新生儿呼吸窘迫综合征患儿动脉血气指标,缩短康复时间,减少各类并发症出现。
文摘目的:分析早产儿视网膜病变的转归情况及其进展至重度的危险因素。方法:选取2016年1月-2019年6月本院95例视网膜病变早产儿为研究对象。随访6个月,观察所有患儿的转归情况,比较不同新生儿因素(性别、胎龄、体重、1 min Apgar评分、感染情况及先天性疾病情况)及其他因素(机械通气时间、母亲妊娠期疾病情况、肺表面活性物质应用情况及分娩方式)者的转归情况,并分析早产儿视网膜病变进展至重度的危险因素。结果:95例早产儿中进展至重度者30例(31.58%),自然消退者65例(68.42%)。不同性别、先天性疾病、母亲妊娠期疾病、肺表面活性物质应用情况及分娩方式的早产儿转归情况比较,差异均无统计学意义(P>0.05),而不同胎龄、体重、1 min Apgar评分、感染情况及机械通气时间的早产儿转归情况比较,差异均有统计学意义(P<0.05);多因素logistic回归分析显示,胎龄、体重、1 min Apgar评分、感染情况及机械通气时间均为早产儿视网膜病变进展至重度的危险因素(P<0.05)。结论:早产儿视网膜病变进展至重度的概率较高。胎龄、体重、1 min Apgar评分、感染情况及机械通气时间均为早产儿视网膜病变进展至重度的危险因素,可作为防控与干预措施制定的参考依据。
基金financially supported by the National Natural Science Foundation of China(No.21276086)
文摘The effect of mixed oxide support on the performance of Ni/ZnO in the reactive adsorption desulfurization(RADS) reaction was investigated in a fixed bed reactor by using thiophene as the sulfur-containing compound in the model gasoline. A series of oxide supports for Ni/ZnO were synthesized by the co-precipitation method and characterized by XRD, N_2-adsorption, TPR and NH_3-TPD techniques. It was found that the desulfurization capacity of Ni/ZnO was enhanced greatly when active components were supported on the proper mixed oxide. Ni/ZnO supported on oxides exhibited much higher desulfurization efficiency and sulfur adsorption capacity than the unsupported Ni/ZnO and the synthesized Ni/ZnO-SA adsorbent exhibited the highest efficiency for thiophene removal. The higher desulfurization activity and sulfur capacity of Ni/ZnO supported on SiO_2-Al_2O_3 with small particle size, high specific surface area and large pore volume could promote the high dispersion of active metal phase and the transfer of sulfur to ZnO with lower mass transfer resistance. γ-Al_2O_3 species could weaken the interaction of active phases and SiO_2 as well as could increase greatly the amount of weak acids. Therefore, these oxides could impose a great influence on the structure and chemical properties of the catalyst.
