Renal DialysisHemodialysis Units, HospitalCapital ExpendituresDithioerythritolKidney Failure, ChronicPeritoneal DialysisDialysisDialysis SolutionsPeritoneal Dialysis, Continuous AmbulatoryProgram EvaluationUltrasonographyUltrasonicsUltrasonic TherapyHigh-Intensity Focused Ultrasound AblationProgram DevelopmentUltrasonography, InterventionalMicrobubblesPeritonitisPeritoneumIntensive Care UnitsUltrasonography, PrenatalTime FactorsProspective StudiesTreatment OutcomeTransducersRetrospective StudiesPregnancyGovernment ProgramsUnited StatesSensitivity and SpecificityCatheters, IndwellingReproducibility of ResultsUltrasonography, DopplerRisk FactorsFollow-Up StudiesUltrasonography, Doppler, ColorHemodialysis SolutionsUltrafiltrationNational Health ProgramsMicroscopy, AcousticNephrologyContrast MediaPredictive Value of TestsImaging, Three-DimensionalUreaInfant, Newborn