简介:目的:评价24h食管pH值监测、胃镜检查、胃食管反流病问卷调查(GerdQ)在胃食管反流病中诊断价值。方法:40例初诊为烧心、反流的患者,分别予以24h食管pH值监测、胃镜检查、胃食管反流病问卷调查。结果:食管pH值监测灵敏度0.9722,特异度1,Youden指数0.9722;GerdQ灵敏度0.7778,特异度0.25,Youden指数0.0278;胃镜检查灵敏度0.833,特异度0.75,Youden指数0.583。24h食管pH值监测较胃食管反流病问卷(GerdQ)有显著差异(P〈0.05);24h食管pH值监测较有胃镜检查显著差异(P〈0.05)。结论:24h食管pH值监测在胃食管反流病中诊断价值明显高于胃镜检查、胃食管反流病问卷调查(GerdQ)。
简介:Monoammoniumphosphate(1molL^-1),monopotassiumphosphate(1molL^-1)andaluminumchloride(5×10^-3molL^-1)wereusedtoinvestigatetheinfluenceofpHontheformationofNH4-taranakiteandK-taranakiteinsystemswithahighNH4H2PO4orKH2PO4concentration.TheexperimentaldataindicatedthatthereactionproductsofaluminumwithNH4H2PO4orKH2PO4changedwiththepHinthesystems.InapHrangeof2.5to10.0,asthepHincreased,theproductsineitherammoniumorpotassiumsystemfollowedthesequence:taranakite,amorphous(NH4,K)2AIH(PO4)2.4H2O,andthencrystalline(NH4,K)AlPO4OH.2H2O.However,thepHrangesoftheformationoftheseproductsinammoniumsystemweredifferentfrompotassiumsystem.NH4-taranakiteformedfrompH2.75topH5.75,whereasK-taranakiteformedinthepHrangeof3.00to5.0,Fromthetheoreticalcalcuationbyacomputerprogram(GEOCHEMversion2.0),NH4-taranakteandK-taranakitecouldformatthepHfrom1.50to8.30andfrom1.25to8.45,respectively.ThesepHrangesweremuchwiderthantheexperimentalresults.Thedifferencebetweentheexperimentaldataandtheoreticaldatawasattributedtothelackofkineticdataand/ortheincompletenessandinaccuracyofthethermodynamicdatainthedatabaseoftheprogram.ThepHrangesoftheformationofthetaranakitesindicatedthatthetaranakitescouldexistintheimmediatevicinityofphosphateferilizerzoneasreactionproductsofphosphatefertilizerswithsoils,especiallyacideicsoils,resultinginthefixationofnotonlyphosphatebutalsonitrogenand/orpotassiuminsoils.
简介:摘要目的对胃黏膜pH对小儿重症肺炎合并胃黏膜损伤的临床诊断价值进行分析。方法选取本院在2017年4月~2018年1月收治重症肺炎并发胃黏膜损伤患儿52例为观察组,选取同期收治单纯重症肺炎患儿50例为对照组,对比两组患儿不同时间胃黏膜pH。结果观察组通气前胃黏膜pH及PaO2、PgCO2-PaCO2、PaO2/FiO2均显著低于对照组;在机械通气时间不断延长下,两组患者各指标均有所改善,且观察组各指标仍显著低于对照组;对观察组各指标进一步分析,PaO2、PaO2/FiO2与胃黏膜pH成正比,PgCO2-PaCO2与胃黏膜pH成反比。结论重症肺炎并发胃黏膜损伤的患儿胃黏膜pH相对较低,同时可用于对患者胃黏膜缺血缺氧改善情况评估之中,值得在临床中推广。
简介:Withtherapiddevelopmentofglobalinformationhighway,multimediacommunicationtechnologyplaysamoreandmoreimportantroleinnationaleconomicandsocialdevelopment.However,themultimediacommunicationsystemisacomplicatedrealtimedistributedsystemanditssoftwareisdifficulttodevelop.Inordertoimprovetherapiddevelopmentandapplicationofthemultimediacommunicationtechnology,thereisanurgentneedtocarryoutthebasicresearchworkofsoftwaredevelopmentplatforminthisfield.
简介:Title:DiscontinuousDeformationAnalysisandRecentCrustalMovementAuthor:WANGZeminSupervisor:LIUJingnanThestudyfocusesonthewait_to_be_resolvedimportantdifficultproblem—howtoanalyzeandprocessthenumerousdataofcrustalmovementgainedbyrecentmeasuringmethodsoastodiscovertheinnermechanisms,thispaper,adopt