c h e m i s t r y - austin community college district：c h e m我的t y -奥斯汀社区学院区

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1、UrinalysisandBodyFluidsCRgUnit4SerousBodyFluidsSerousFluidsSerousfluidssmallamountoffluidthatliesbetweenthemembranesliningthebodycavities(parietal)andthosecoveringtheorganswithinthecavities(visceral).actsaslubricant,providenutrients,removewastesSerousFluidsBodycavitiesPericardial-heartPleural

2、-lungsPeritoneal–abdominalMembranesLinedwithmesothelialcellsParietal–linescavitywallVisceral–coversorganscontainedwithinSerousfluidsfillthespacebetweenSerousFluids“ultrafiltrate”oftheplasmacloselyresemblestheplasma(asopposedtoCSF)AppearancePossiblereason/conditionPaleyellow&clearNormalWhite,t

3、urbidWBCs/infectionBloodyRBCs/hemorrhageMilkyChyle–lymph&emulsifiedfatsViscousIncreasedhyaluronicacid/malignantmesothelialomaSerousFluidsProducedbyhydrostaticandoncotic(protein)pressureinthecapillariesliningthemembranesNormallyproducedataconstantrate.Production(☛parietalmembrane)Re-absorption

4、(☛visceralmembrane)SerousFluidsProductionandre-absorptionareinfluencedby:ChangesinosmoticandhydrostaticpressureinthebloodConcentrationofchemicalconstituentsintheplasmaPermeabilityofbloodvesselsandthemembranesSerousFluidsTypesofserousfluidsPericardialfluid–aroundheartPleuralfluid(thoracicfluid

5、)–lungcavityPeritoneal(asciticfluid)–abdominalcavityReasonsforanalysisInfectionsHemorrhagesmalignancies,andotherdisorders.SerousFluidsSpecimenCollectionandHandlingNeedleaspirationParacentesisThoracentesisPericardiocentesisLavage(ie.peritoneallavage)Ringer’slactate/salineisinfusedintoabdomenth

6、enretrievedforanalysis.Specimensometimescalledascitesfluid.SerousFluids-Composition&FormationEffusionanincreaseintheserousfluidduetosomedisruptioninproduction&/re-absorptionprocesses.Classificationofcauseofaneffusionisaidedbydeterminingifthefluidisa“transudate”oran“exudate”.SerousFluids-Eff

7、usionTransudateaneffusionthatisaresultofasystemicdisorderthatdisruptsthebalanceoffluidproduction/fluidre-absorption.Examples:Pleuraltransudate–congestiveheartfailure;Pericardialtransudate–nephroticsyndrome,metastaticcancerSerousFluidsExudates