Principles Questions and Answers
HemodialysisMsystemMconsistsMofM-
MAnswerMdialyzer,MextracorporealMsystemMandMdialysisMdeliveryMsystem
DialyzerM-MAnswerMsemipermeableMmembraneMtoMfilterMpatient'sMblood
DialysisMdeliveryMsystemM-MAnswerM1.MmixesMandMdeliversMdialysateMtoMdialyzer
2.MpumpsMbloodMthroughMextracorporealMcircuitMintoMdialyzer
3.MprovidesMmonitoringMsystemsMtoMensureMsafeMtreatment
SoluteM-MAnswerMparticleMthatMcanMbeMdissolvedMinMliquid
SoluteMexamplesM-MAnswerMElectrolytes:Msodium,Mchloride,Mpotassium
WasteMproducts:Murea,Mcreatinine
SolutesMmovementM-MAnswerMdiffusion
filtration
FluidMremovalM-MAnswerMosmosis
ultrafiltration
DiffusionM-
MAnswerMmovementMofMsolutesMfromMhigherMconcentrationMtoMlowerMconcentrationMar
eaMthroughMsemipermeableMmembrane
movementMwillMoccurMuntilMbothMsidesMareMofMequalMconcentration
, primaryMwasteMremovalMmechanismMinMHD
FiltrationM-
MAnswerMmovementMofMfluidMthroughMaMfilterMasMaMresultMofMhydraulicMpressureM(ie
McoffeeMpot)
FiltrationMprocessM-MAnswerM1.MfluidMpassesMfromMtheMbloodMintoMtheMdialysate
2.MbloodMcellsMandMlargeMproteinMmoleculesMcannotMpassMthroughMtheMmembrane
3.MhydraulicMpressureMisMcreatedMwithinMtheMdialyzer
4.MresultsMinMmovementMofMsolutesMandMfluidMfromMbloodMthroughMsemipermeableMm
embrane
OsmosisM-
MAnswerMmovementMofMfluidMfromMlowMsoluteMconcentrationMtoMhigherMsoluteMconcen
trationMarea
OsmosisMprocessM-
MAnswerM1.MosmoticMpressureMisMcreatedMacrossMaMmembraneMdueMtoMdifferencesMin
Mconcentration
2.MhydraulicMpressureMovercomesMosmoticMpressure
3.MpressureMexertedMacrossMtheMdialyzerMmembrane,MresultsMinMfluidMremoval
UltrafiltrationM-
MAnswerMmovementMofMwaterMasMtheMresultMofMpressureMacrossMaMmembrane
dialyzerMandMdialysisMmachineMcreateMaMhigherMpressureMonMtheMbloodMsideMofMtheM
membraneMthanMonMtheMdialysateMside