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1、Firstsection:Bloodroutinetest(BRT)HasSomeonehereeverheardofBRTbefore?Yes!Verygoodmanystudentshaveheardbefore.(NO?maybeyouareallveryhealthy).whenyougotohospital,doctorsalwaysapplyforaBRTasareferencetoyourdisease.Theycanknowabouttheredbloodcells,whitebloodcellsandplateletset,al.SoBRTisthemostcom
2、monexaminationinclinicallaboratory.Todaywewilllearnthebloodroutinetest(theabbreviationisBRT)orcompletebloodcount(CBC).1．Samplecollectingfirst,wewilllearnaboutthecollectionofBRTsample.Thebloodcanbecollectedfromfingerorvein.Butwearealwayscollectingbloodfromvein,Becausetheresultcomefromaveinsampl
3、eismoreaccurateandstablethanfromfinger.Butifitisverydifficulttofindagoodveintocollect,forexample,whenwemeetwithababy.Afterwecollectedthesample,thebloodmustbeanticoagulatedwithEDTA-K2.Becausewewillcountcellsinit.Wewilllearninthelater.Herepleaseremembertheanticoagulant----EDTA-K2.OK,letstakealoo
4、kofthemaincontentsofBRT.Itconcludethreeparts,theyareRBC,WBC,PLT.Nowwewilllearnonebyone.2.RBCrelatedparametersAtfirst,willlearnabouttheredbloodcells.Therearesevenparametersrelatedtoit.Theyare：1）Thenumberofredbloodcells(RBC)2）Theamountofhemoglobinintheblood(Hb)3）Hematocrit（Hct）4）meancorpuscularv
5、olume(MCV)5）Meancorpuscularhemoglobin（MCH）6）Meancorpuscularhemoglobinconcentration(MCHC)7）Redbloodcellvolumedistributionwidth（RDW)1）RBCandHbNow,letslearnaboutRBCandhemoglobin.weputthetwoindexestogether,becausetheyhavethesameclinicalsignifcance.（1）ThenormalvaluesThenormalvaluesofRBCistomale:the
6、normalnumberofRBCis4.0-5.5,toFemale:is3.5-5.0millionmillionsperliter.soitisdifferentbetweenmaleandfemale.FamiliartoRBC,thenormalvalueofhemoglobinisdifferentbetweenmaleandfemaletoo.Allthevaluesabovearerequiredtoremember.ThenumbersofRBCortheconcentrationsofHbisincreased,itcanbecausedbyrelativefa
7、ctorsorabsolutelyfactors.Forexample,whenwesickingburningorsweatingtoomuch,muchwatersinourbodywillbelost,theplasmaisconcentrated,sotheRBCnumbersisrelativelyincreasing.Somediseases,suchasheartdisease,lungdisease,canalsocausethenumberofRB
