目的探讨改良外周置入中心静脉导管(peripherally inserted central catheter,PICC)预处理法预防化疗患者机械性静脉炎的效果。方法将2009年1月到2012年5月在常州市第二人民医院血液肿瘤科行PICC置管的130例化疗患者分为对照组和研究组...目的探讨改良外周置入中心静脉导管(peripherally inserted central catheter,PICC)预处理法预防化疗患者机械性静脉炎的效果。方法将2009年1月到2012年5月在常州市第二人民医院血液肿瘤科行PICC置管的130例化疗患者分为对照组和研究组各65例,对照组用传统的生理盐水100ml浸泡并冲洗导管,研究组用生理盐水100ml加地塞米松5mg、庆大霉素8万U混合液浸泡并冲洗导管,浸泡时间均为5min。比较两组置管患者机械性静脉炎及其他导管相关并发症的发生率。结果研究组机械性静脉炎的发生率(7.69%)低于对照组(20.00%),差异有统计学意义(χ2=4.13,P<0.05);两组局部渗血、导管阻塞和导管相关感染等其他并发症的发生率差异无统计学意义(均P>0.05)。结论改良PICC预处理法可以明显降低机械性静脉炎的发生率,而且不增加其他导管相关并发症的发生率,操作简单,使用安全,值得临床推广应用。展开更多
Pretrcatment technology is deeply discussed to explain its importance in guaranteeing properties and form- ability of aluminum alloy automotive sheet. Some typical applications of aluminum alloy automotive sheet to au...Pretrcatment technology is deeply discussed to explain its importance in guaranteeing properties and form- ability of aluminum alloy automotive sheet. Some typical applications of aluminum alloy automotive sheet to automotive industry are listed. Based on the author＇s knowledge and recognition and research progress presently, the important re- search contents about aluminum alloy automotive sheet are emphasized. Reducing cost and price of sheet and going deeply into application research are the main work for expending the application of aluminum alloy automotive sheet in the automobile.展开更多
Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatment of the milled powder mixture and subsequent spark plasma sintering （SPS）. Ball milling parameters and the pretreatment ...Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatment of the milled powder mixture and subsequent spark plasma sintering （SPS）. Ball milling parameters and the pretreatment temperature have significant effects on the microstructure and properties of WC-Co cermets. The prepared cermets have a mean grain size of less than 0.5 μm even with a pretreatment temperature as high as 1300℃. The WC-10wt.%Co cermet bulk prepared by the optimized milling, pretreatment, and SPS processing achieves excellent mechanical properties with a Vickers hardness of HV 1643, a fracture toughness of 13.1 MPa.m^1/2 and a transverse rapture strength of 3100 MPa.展开更多
文摘目的探讨改良外周置入中心静脉导管(peripherally inserted central catheter,PICC)预处理法预防化疗患者机械性静脉炎的效果。方法将2009年1月到2012年5月在常州市第二人民医院血液肿瘤科行PICC置管的130例化疗患者分为对照组和研究组各65例,对照组用传统的生理盐水100ml浸泡并冲洗导管,研究组用生理盐水100ml加地塞米松5mg、庆大霉素8万U混合液浸泡并冲洗导管,浸泡时间均为5min。比较两组置管患者机械性静脉炎及其他导管相关并发症的发生率。结果研究组机械性静脉炎的发生率(7.69%)低于对照组(20.00%),差异有统计学意义(χ2=4.13,P<0.05);两组局部渗血、导管阻塞和导管相关感染等其他并发症的发生率差异无统计学意义(均P>0.05)。结论改良PICC预处理法可以明显降低机械性静脉炎的发生率,而且不增加其他导管相关并发症的发生率,操作简单,使用安全,值得临床推广应用。
文摘Pretrcatment technology is deeply discussed to explain its importance in guaranteeing properties and form- ability of aluminum alloy automotive sheet. Some typical applications of aluminum alloy automotive sheet to automotive industry are listed. Based on the author＇s knowledge and recognition and research progress presently, the important re- search contents about aluminum alloy automotive sheet are emphasized. Reducing cost and price of sheet and going deeply into application research are the main work for expending the application of aluminum alloy automotive sheet in the automobile.
基金supported by the National Natural Science Foundation of China (Nos. 50401001 and 50671001) the Program for New Century Excellent Talents in Universities of China (No. NCET-06-0182)
文摘Ultrafine-grained WC-Co bulk materials were prepared by a new method that contains pretreatment of the milled powder mixture and subsequent spark plasma sintering （SPS）. Ball milling parameters and the pretreatment temperature have significant effects on the microstructure and properties of WC-Co cermets. The prepared cermets have a mean grain size of less than 0.5 μm even with a pretreatment temperature as high as 1300℃. The WC-10wt.%Co cermet bulk prepared by the optimized milling, pretreatment, and SPS processing achieves excellent mechanical properties with a Vickers hardness of HV 1643, a fracture toughness of 13.1 MPa.m^1/2 and a transverse rapture strength of 3100 MPa.
