KidneyKidney Function TestsGlomerular Filtration RateCreatinineKidney DiseasesRenal InsufficiencyKidney Failure, ChronicAcute Kidney InjuryRetrospective StudiesDelayed DiagnosisProteinuriaEarly DiagnosisPrenatal DiagnosisSensitivity and SpecificityTime FactorsRenal CirculationKidney TransplantationProspective StudiesTreatment OutcomeRenal Artery ObstructionRadioisotope RenographyFollow-Up StudiesTechnetium Tc 99m MertiatideCystatin CBiological MarkersNephrectomyRisk FactorsDiagnosisBiopsyBlood Urea NitrogenRenal ArteryRenal Insufficiency, ChronicPredictive Value of TestsPrognosisBlood PressureRenal DialysisDiuresisRenal Plasma Flow, EffectiveKidney TubulesTechnetium Tc 99m PentetateImmunosuppressive AgentsAlbuminuriaDiabetic NephropathiesAnuriaHydronephrosisCardio-Renal SyndromePeritoneal DialysisCohort StudiesTomography, X-Ray ComputedDisease ProgressionMetabolic Clearance RateHypertension, RenalUreaDiagnostic ErrorsRenal Plasma FlowChronic DiseaseHypertensionReproducibility of ResultsSeverity of Illness IndexGlomerulonephritisAge FactorsNatriuresisKidney GlomerulusHypertension, RenovascularNephritis, InterstitialCyclosporineCystatinsGlomerulonephritis, IGADiureticsUrineIothalamic AcidUreteral ObstructionPregnancyInfant, NewbornIodohippuric AcidInulinNursing DiagnosisDiagnosis, Computer-AssistedGraft RejectionIncidenceAcute DiseaseFurosemideAngiotensin-Converting Enzyme InhibitorsSurvival RateRisk AssessmentKidney Tubular Necrosis, AcuteHeart FailureCase-Control StudiesMagnetic Resonance ImagingUremiaHalf-LifeReninPostoperative ComplicationsIohexolCross-Sectional StudiesReference ValuesGlomerulonephritis, MembranousContrast Mediap-Aminohippuric AcidPreimplantation Diagnosis