简介:摘要目的探索不同扩皮方法对经外周静脉置入中心静脉导管(PICC)置管后穿刺点渗血的影响。方法选取2019年6月至2020年6月宁夏医科大学总医院收治的126例行PICC置管的患者作为研究对象,采用区组随机化法,分为参照组与试验组各63例。给予参照组患者以常规扩皮方法进行扩皮,给予试验组患者以钝性分离发进行扩皮,对比两组患者的一次性送鞘成功率、渗血情况及疼痛情况。结果试验组患者的一次性送鞘成功率为96.83%,显著高于参照组的82.54%(P<0.05);术后24 h及48 h,试验组患者的视觉模拟评分法(VAS)评分均显著低于参照组(P<0.05);试验组患者中无渗血、渗液情况患者数量、少量渗血、渗液情况患者数量显著多于参照组差异有统计学意义(P<0.05);试验组患者中大量渗血、渗液情况患者数量、淋巴漏液情况显著少于参照组,差异有统计学意义(P<0.05)。结论以微插管鞘中扩张器与传统穿刺针组装后予以直接扩张穿刺点送鞘的钝性分离法针对行PICC置管的患者进行扩皮,能够有效提升一次性送鞘成功率,同时缓解患者术后疼痛情况,降低术后渗血情况发生率。
简介:在由氰酸盐(KCNO和NaCNO)与碳酸盐(K2CO3和Na2CO3)组成的盐浴中添加适量稀土La,对35钢材料进行盐浴碳氮共渗,对涂层的显微组织、涂层的厚度、显微硬度沿层深的分布以及涂层的耐磨性进行测试与分析,研究稀土La对35钢盐浴碳氮共渗的影响。结果表明:在盐浴中添加稀土La可显著提高碳氮共渗层的厚度和表面硬度;在温度为560℃、时间为2h条件下进行盐浴碳氮共渗时,添加稀土La可增加化合物层的厚度,稀土添加量(质量分数)为5%时化合物层最厚;添加稀土还可提高涂层硬度,在575℃/2h、添加5%稀土条件下盐浴碳氮共渗后,试样表层硬度HV0.01达到最大值835,且耐磨性显著提高,与常规盐浴碳氮共渗相比,质量磨损降低38.4%。
简介:[篇名]Amethodofmakingborideandvitreouscompoundbypowdermetallurgy,[篇名]Ceramic-metalcompositesobtainedbyreactiveprcssurclcsscountcrflowinlitration/pcnctration(RPCI)ofaceramicsubstratewithtwodifferentmetallicinfiltrants,[篇名]CharacterizationofDirectionallySolidifiedB{sub}4C-TiB{sub)2andB{sub)4C-SiCEutecticCompositesPreparedbyFloating-ZoneMethod,[篇名]Corrosionresistanceofanironbaseboridccermetswithoxidesurfacelayersnamoltenalalloy,[篇名]Crackpropagationcharacteristicsandfracturesurfaceenergyofborideconners,[篇名]Depositionofhardand/orcorrosionresistant,singleandmultielementcoatingsonferrousandnonferrousalloysinfluidizedbedreactor,[篇名]Depositionofprotectivecoatingsontungstenfreehardalloys。
简介:AnomalousLeakageCurrentinSilicon0xynitrideThinFilmsGrownbyMicrowaveExcitedNitrogenPlasmaNitridation.Applicationoftheexplosivemethodforcreatingnitrogenlayers;Brightplasmanitridingofferriticsteelwithseveralalloyingelements;Cleaningasthemostimportantsteptowardssuccessfulheattreatment
简介:Developmentandpracticalapplicationofborideasengineeringceramics;Developmentandpracticalapplicationofborideasengineeringceramics;Effectofboronmicro-alloyingonmicrostructureandmechanicalpropertiesoffine-grainedCM247LCsuperalloy;Effectsofmetallicelementsonthermoelectricpropertiesofsiliconborides
简介:[篇名]ActivatedMigrationSintering,[篇名]Activationofsteelsurfacesbyoxynitriding,[篇名]Activescreenplasmanitridingtechnology,[篇名]AdvancedPlasmaNitridingforAluminumandAluminumAlloys,[篇名]Ananti-corrosionandwear-resistingcompoundingnitridedlayeronprecisepressedpartsofsoftsteels,[篇名]Anexperimentalstudytocorrelatewaterjetimpingementerosionresistanceandpropertiesofmetallicmaterialsandcoatings,[篇名]AnInfluenceofSonBombardingontheEffectsofNitridinginD.C.GlowDischargePlasma。