简介:摘要目的探讨在临床输液过程中,两种不同结构的精密过滤输液器空气进入输液管的排气效果。方法选取2011年10月至2012年10月在我院特诊外科输液的病人,应用精密过滤盘有排气孔的输液器出现空气进入输液管内100例次,设为观察组;应用精密过滤盘无排气孔的输液器出现空气进入输液管内100例次,设为对照组。分别观察两组在输液时空气进入输液管后的处理时间、过滤盘内残留空气发生率。结果两种输液器在空气进入输液管后的处理时间、过滤盘内残留空气发生率比较,P<0.01,差异有统计学意义。结论过滤盘有排气孔精密过滤输液器有自动排气功能,空气进入输液管内的排气方法简单有效,值得在临床推广使用。
简介:Inthepresentwork,computationalsimulationswasmadeusingANSYSCFXtopredicttheimprovementsinfilmcoolingperformancewithdualtrench.Dual-trenchconfigurationconsistsoftwotrenchestogether,onewidertrenchandtheotherisnarrowtrenchthatextrudedfromthewiderone.Severalblowingratiosintherange(0.5:5)wereinvestigated.Thepitch-to-diameterratioof2.775isused.Byusingthedualtrenchconfiguration,thecoolantjetimpactedthetrenchwalltwotimesallowingincreasingthespreadingofcoolantlaterallyinthetrench,reducingjetvelocityandjetcompletelycoveredonthesurface.Theresultsindicatethatthisconfigurationincreasedadiabaticeffectivenessasblowingratioincreased.Thespatiallyaveragedadiabaticeffectivenessreached57.6%foratM=2.Noobservedfilmblow-offatallblowingratios.Theadiabaticfilmeffectivenessofdualtrenchcaseoutperformedthenarrowtrenchcase,laidbackfan-shapedhole,fan-shapedholeandcylinderholeatdifferentblowingratios.