文章以84例经外周静脉穿刺中心静脉置管(peripherally inserted central catheter,PICC)早产儿为观察对象,探讨PICC置管位置差异对早产儿置管效果及并发症的影响。研究发现,PICC下肢静脉置管用于早产儿可有效提高置管成功率,缩短置管用...文章以84例经外周静脉穿刺中心静脉置管(peripherally inserted central catheter,PICC)早产儿为观察对象,探讨PICC置管位置差异对早产儿置管效果及并发症的影响。研究发现,PICC下肢静脉置管用于早产儿可有效提高置管成功率,缩短置管用时,避免导管异位发生,且未增加相关并发症发生风险。展开更多
This paper deals about testing thermal properties of the cooling device with heat pipes at inclination position, in consequence of using the natural convection to improve heat transfer properties. Head point testing o...This paper deals about testing thermal properties of the cooling device with heat pipes at inclination position, in consequence of using the natural convection to improve heat transfer properties. Head point testing of cooling device is monitoring temperature on the aluminium block of energy converter, heat pipes and ribs under temperature condition 30 ℃ in thermostatic chamber. Testing of the device was performed at tilt angles positions 0, 10 and 20° from the vertical level. The heat flux loaded to energy converter was 450 W. The next goal of the paper is to research on influence working position of the wick heat pipe on their thermal performance. In this research heat pipes were made with capillary structure sintered from copper powder granularity 100, 63 and 50 μm filled with water and ethanol. Next heat pipe thermal performance was performed by measuring heat source and working positions. Knowledge of these two research goals can bring potential improvements in purpose of cooling device for effective heat sink from high power electronic components.展开更多
文摘文章以84例经外周静脉穿刺中心静脉置管(peripherally inserted central catheter,PICC)早产儿为观察对象,探讨PICC置管位置差异对早产儿置管效果及并发症的影响。研究发现,PICC下肢静脉置管用于早产儿可有效提高置管成功率,缩短置管用时,避免导管异位发生,且未增加相关并发症发生风险。
文摘目的：探讨低出生体重儿经外周静脉置入中心静脉导管（PICC ）置管最佳体外测量方法。方法2012年1月18日～2013年12月18日，对在我院进行PICC置管的低出生体重儿按置管时间随机分为观察组和对照组，观察组测量方法是经头静脉穿刺时，压脉带自穿刺点沿静脉走向，在右侧上肢外侧上行至锁骨中线，弯曲向下至右侧乳头与前正中线中点，经正中及贵要静脉穿刺时，压脉带自穿刺点沿静脉走向，在右侧上肢内侧上行至锁骨中线，弯曲向下至右侧乳头与前正中线的中点，再测量压脉带的长度，为导管预留置长度。对照组测量方法是自穿刺点至右胸锁关节长度，再加0．5 cm ，为导管预留置长度。比较两组患儿置管的准确率。结果观察组PICC置入上腔静脉中下段的准确率为77．8％，对照组PICC置入上腔静脉中下段的准确率为44．4％，两组比较 P＜0．05，差异有显著意义。结论低出生体重儿PICC置管使用压脉带进行体外测量，可提高PICC置入上腔静脉中下段的准确率。
文摘This paper deals about testing thermal properties of the cooling device with heat pipes at inclination position, in consequence of using the natural convection to improve heat transfer properties. Head point testing of cooling device is monitoring temperature on the aluminium block of energy converter, heat pipes and ribs under temperature condition 30 ℃ in thermostatic chamber. Testing of the device was performed at tilt angles positions 0, 10 and 20° from the vertical level. The heat flux loaded to energy converter was 450 W. The next goal of the paper is to research on influence working position of the wick heat pipe on their thermal performance. In this research heat pipes were made with capillary structure sintered from copper powder granularity 100, 63 and 50 μm filled with water and ethanol. Next heat pipe thermal performance was performed by measuring heat source and working positions. Knowledge of these two research goals can bring potential improvements in purpose of cooling device for effective heat sink from high power electronic components.
