目的探讨老年肺癌患者行单孔胸腔镜下肺叶或肺段切除术后并发症发生的危险因素。方法纳入2020年1月至2021年12月首都医科大学宣武医院胸外科行单孔胸腔镜肺叶或肺段切除手术的≥60岁的387例老年肺癌患者作为研究对象,中位年龄67(60~87)...目的探讨老年肺癌患者行单孔胸腔镜下肺叶或肺段切除术后并发症发生的危险因素。方法纳入2020年1月至2021年12月首都医科大学宣武医院胸外科行单孔胸腔镜肺叶或肺段切除手术的≥60岁的387例老年肺癌患者作为研究对象,中位年龄67(60~87)岁,其中男性171例(44.2%),女性216例(55.8%)。对老年肺癌患者的术后并发症进行分析,评估老年肺癌患者行单孔胸腔镜肺段或肺叶切除术后并发症发生的危险因素。结果387例患者中共有66例(17.1%)术后出现并发症,其中1例(0.3%)患者死亡。单因素及多因素分析显示:男性(P=0.020)、第1秒用力呼气容积(forced expiratory volume in the first second,FEV1)<1.5 L(P=0.017)、一氧化碳弥散量占预计值百分比(diffusion capacity of the lungs for carbon monoxide as a percentage of the predicted value,DLCO%pred)<80%(P=0.016)、伴有肺部合并症病史(P<0.001)、脑卒中病史(P<0.001)、手术时长≥3 h(P=0.018)为术后出现并发症的独立预测因素。而伴有肺部合并症病史(P<0.001)及手术时长≥3 h(P=0.002)是术后出现肺部并发症的独立危险因素(P<0.05)。结论老年肺癌患者可能因肺部合并症、低肺功能、手术时间等出现术后并发症,因此术前应充分评估老年肺癌患者的生理情况。通过加强围术期管理降低术后并发症的发生率,降低术后并发症对老年肺癌患者行单孔胸腔镜手术治疗效果的影响。展开更多
In order to improve the cycling stability of AB5 type alloy electrodes,rapid quenching technology and new alloy composition design were employed.A hydrogen storage alloy with nominal composition La0.6Ce0.4Ni3.6Co0.65M...In order to improve the cycling stability of AB5 type alloy electrodes,rapid quenching technology and new alloy composition design were employed.A hydrogen storage alloy with nominal composition La0.6Ce0.4Ni3.6Co0.65Mn0.4Al0.2Ti0.05（FeB）0.1 was prepared by vacuum magnetic levitation melting under high purity argon atmosphere,followed by rapid quenching at different cooling rates.XRD results show that all alloys exhibit the single-phase CaCu5-type structure.Electrochemical tests indicate that rapid quenching can slightly improve the cycling life of the alloy.Nevertheless,the high-rate dischargeability of the quenched alloys is lower than that of the as-cast alloy.展开更多
Nanocrystalline and amorphous LaMg_（12）-type LaMg_（11）Ni ＋ x wt% Ni（x = 100, 200） alloys were synthesized by mechanical milling. Effects of Ni content and milling time on the gaseous and electrochemical hydroge...Nanocrystalline and amorphous LaMg_（12）-type LaMg_（11）Ni ＋ x wt% Ni（x = 100, 200） alloys were synthesized by mechanical milling. Effects of Ni content and milling time on the gaseous and electrochemical hydrogen storage kinetics of as-milled alloys were investigated systematically. The electrochemical hydrogen storage properties of the as-milled alloys were tested by an automatic galvanostatic system. And the gaseous hydrogen storage properties were investigated by Sievert apparatus and a differential scanning calorimeter（DSC） connected with a H_2 detector. Hydrogen desorption activation energy of alloy hydrides was estimated by using Arrhenius and Kissinger methods. It is found that the increase of Ni content significantly improves the gaseous and electrochemical hydrogen storage kinetic performances of as-milled alloys. Furthermore, as ball milling time changes, the maximum of both high rate discharge ability（HRD） and the gaseous hydriding rate of as-milled alloys can be obtained. But the hydrogen desorption kinetics of alloys always increases with the extending of milling time. Moreover, the improved gaseous hydrogen storage kinetics of alloys are ascribed to a decrease in the hydrogen desorption activation energy caused by increasing Ni content and milling time.展开更多
文摘目的探讨老年肺癌患者行单孔胸腔镜下肺叶或肺段切除术后并发症发生的危险因素。方法纳入2020年1月至2021年12月首都医科大学宣武医院胸外科行单孔胸腔镜肺叶或肺段切除手术的≥60岁的387例老年肺癌患者作为研究对象,中位年龄67(60~87)岁,其中男性171例(44.2%),女性216例(55.8%)。对老年肺癌患者的术后并发症进行分析,评估老年肺癌患者行单孔胸腔镜肺段或肺叶切除术后并发症发生的危险因素。结果387例患者中共有66例(17.1%)术后出现并发症,其中1例(0.3%)患者死亡。单因素及多因素分析显示:男性(P=0.020)、第1秒用力呼气容积(forced expiratory volume in the first second,FEV1)<1.5 L(P=0.017)、一氧化碳弥散量占预计值百分比(diffusion capacity of the lungs for carbon monoxide as a percentage of the predicted value,DLCO%pred)<80%(P=0.016)、伴有肺部合并症病史(P<0.001)、脑卒中病史(P<0.001)、手术时长≥3 h(P=0.018)为术后出现并发症的独立预测因素。而伴有肺部合并症病史(P<0.001)及手术时长≥3 h(P=0.002)是术后出现肺部并发症的独立危险因素(P<0.05)。结论老年肺癌患者可能因肺部合并症、低肺功能、手术时间等出现术后并发症,因此术前应充分评估老年肺癌患者的生理情况。通过加强围术期管理降低术后并发症的发生率,降低术后并发症对老年肺癌患者行单孔胸腔镜手术治疗效果的影响。
基金supported by the National High-Tech Research and Development Program of China (No.2006AA11A159)
文摘In order to improve the cycling stability of AB5 type alloy electrodes,rapid quenching technology and new alloy composition design were employed.A hydrogen storage alloy with nominal composition La0.6Ce0.4Ni3.6Co0.65Mn0.4Al0.2Ti0.05（FeB）0.1 was prepared by vacuum magnetic levitation melting under high purity argon atmosphere,followed by rapid quenching at different cooling rates.XRD results show that all alloys exhibit the single-phase CaCu5-type structure.Electrochemical tests indicate that rapid quenching can slightly improve the cycling life of the alloy.Nevertheless,the high-rate dischargeability of the quenched alloys is lower than that of the as-cast alloy.
基金Funded by the National Natural Science Foundation of China(Nos.51471054,51761032,and 51371094)the Natural Science Foundation of Inner Mongolia,China(No.2015MS0558)
文摘Nanocrystalline and amorphous LaMg_（12）-type LaMg_（11）Ni ＋ x wt% Ni（x = 100, 200） alloys were synthesized by mechanical milling. Effects of Ni content and milling time on the gaseous and electrochemical hydrogen storage kinetics of as-milled alloys were investigated systematically. The electrochemical hydrogen storage properties of the as-milled alloys were tested by an automatic galvanostatic system. And the gaseous hydrogen storage properties were investigated by Sievert apparatus and a differential scanning calorimeter（DSC） connected with a H_2 detector. Hydrogen desorption activation energy of alloy hydrides was estimated by using Arrhenius and Kissinger methods. It is found that the increase of Ni content significantly improves the gaseous and electrochemical hydrogen storage kinetic performances of as-milled alloys. Furthermore, as ball milling time changes, the maximum of both high rate discharge ability（HRD） and the gaseous hydriding rate of as-milled alloys can be obtained. But the hydrogen desorption kinetics of alloys always increases with the extending of milling time. Moreover, the improved gaseous hydrogen storage kinetics of alloys are ascribed to a decrease in the hydrogen desorption activation energy caused by increasing Ni content and milling time.
基金National Natural Science Foundation of China(21171018,51271021)Supported by State Key Laboratory for Advanced Metals and Materials(2019-ZD06,2021Z-18)。
