renal replacement therapy - esicm · 2020-04-17 · renal replacement therapy marlies ostermann...
TRANSCRIPT
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Renalreplacementtherapy
MarliesOstermann
Guy’s&StThomasHospitalLondon
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Disclosures
Speakerhonoraria:Fresenius MitsubishiTanabePharma Biomerieux Baxter
Advisoryrole: Gilead
Gambro-Baxter Fresenius Nxstage
Researchfunding: FreseniusMedicalCare
LaJollaPharma Baxter
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RRT-officialguidelines
NospecificrecommendationregardingRRT
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RRT-officialguidelines
NocommentregardingRRT
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RRT-officialguidelines
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RRToptions
ContinuousextracorporealRRTCVVHF,CVVHDF,CVVHD,(CAVH)IntermittentRRTstandardintermittentHDsustainedlowefficiencydialysis(SLED)prolongedintermittentRRT(usingstandardHDorCRRTmachine)PeritonealdialysisCAPDautomatedPD
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IHD SLEDPIRRT PD CRRT
intermittentcontinuous
Clearance++++++perhourFluidstatusFluctuationsinurea/NH3/Na+
RRToptions
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RRToptionsinCOVID-19patients
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RRToptionsinCOVID-19patients
Idealsituation Reality
CRRT limitedresources
initiationbeforeonsetoflifethreateningcomplications
needforrationingandapplicationofstrictercriteria
prescriptionofdosecompensatesforunplanned‘downtime’
limitedfluids
optimalanticoagulationtomaintainfilterpatency
highriskoffilterclogging/clotting
highlyqualifiedstaff lessqualifiedstaff/surgestaff
ICUenvironment non-criticalcareareaprovisionaccordingtohighstandardsandbenchmarks
needtolowerstandards
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RRToptionsinCOVID-19patients
Idealsituation Reality
CRRT limitedresources/supplies
initiationbeforeonsetoflifethreateningcomplications
needtoapplystrictercriteria
prescriptionofdosecompensatesforunplanned‘downtime’
limitedfluids
optimalanticoagulationtomaintainfilterpatency
highriskoffilterclogging/clotting
highlyqualifiedstaff lessqualifiedstaff/surgestaff
ICUenvironment non-criticalcareareaprovisionaccordingtohighstandardsandbenchmarks
needtolowerstandards
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RRToptionsinCOVID-19patients
Alternative:IntermittentRRTStandardhaemodialysis(4hr)
prolongedintermittentRRT(6-8hr)
needforHDmachine standardHDorCRRTmachine
requiressufficientwateranddrainresourcesandROsystemtogeneratedialysateorfluidsinbags(mobileunit)
waterviaROsystem(HD)orfluidsinbags(mobilecarts,CRRT)
noabsoluteneedforanticoagulation
usuallyneedforanticoagulation
trainedstaff/extrastaff trainedstaff/extrastaff
potentialtotreat4-5pts/day potentialtotreatupto3pts/day
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RRToptionsinCOVID-19patients
Alternative:IntermittentRRTStandardhaemodialysis(4hr)
prolongedintermittentRRT(6-8hr)
needforHDmachine standardHDorCRRTmachine
requiressufficientwateranddrainresourcesandROsystemtogeneratedialysateorfluidsinbags(mobileunit)
waterviaROsystem(HD)orfluidsinbags(mobilecarts,CRRT)
noabsoluteneedforanticoagulation
usuallyneedforanticoagulation
trainedstaff/extrastaff trainedstaff/extrastaff
potentialtotreat4-5pts/day potentialtotreatupto3pts/day
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RRToptionsinCOVID-19patients
Alternative:IntermittentRRTStandardhaemodialysis(4hr)
prolongedintermittentRRT(6-8hr)
needforHDmachine standardHDorCRRTmachine
requiressufficientwateranddrainresourcesandROsystemtogeneratedialysateorfluidsinbags(mobileunit)
waterviaROsystem(HD)orfluidsinbags(mobilecarts,CRRT)
noabsoluteneedforanticoagulation
usuallyneedforanticoagulation
trainedstaff/extrastaff trainedstaff/extrastaff
potentialtotreat4-5pts/day potentialtotreatupto3pts/day
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RRToptionsinCOVID-19patients
Alternative:IntermittentRRTStandardhaemodialysis(4hr)
prolongedintermittentRRT(6-8hr)
needforHDmachine standardHDorCRRTmachine
requiressufficientwateranddrainresourcesandROsystemtogeneratedialysateorfluidsinbags(mobileunit)
waterviaROsystem(HD)orfluidsinbags(mobilecarts,CRRT)
noabsoluteneedforanticoagulation
usuallyneedforanticoagulation
trainedstaff/extrastaff trainedstaff/extrastaff
potentialtotreat4-5pts/day potentialtotreatupto3pts/day
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RRToptionsinCOVID-19patients
Alternative:IntermittentRRTStandardhaemodialysis(4hr)
prolongedintermittentRRT(6-8hr)
needforHDmachine standardHDorCRRTmachine
requiressufficientwateranddrainresourcesandROsystemtogeneratedialysateorfluidsinbags(mobileunit)
waterviaROsystem(HD)orfluidsinbags(mobilecarts,CRRT)
noabsoluteneedforanticoagulation
usuallyneedforanticoagulation
trainedstaff/extrastaff trainedstaff/extrastaff
potentialtotreat4-5pts/day potentialtotreatupto3pts/day
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RRToptionsinCOVID-19patients
Alternative:IntermittentRRTStandardhaemodialysis(4hr)
prolongedintermittentRRT(6-8hr)
needforHDmachine standardHDorCRRTmachine
requiressufficientwateranddrainresourcesandROsystemtogeneratedialysateorfluidsinbags(mobileunit)
waterviaROsystem(HD)orfluidsinbags(mobilecarts,CRRT)
noabsoluteneedforanticoagulation
usuallyneedforanticoagulation
trainedstaff/extrastaff trainedstaff/extrastaff
potentialtotreat4-5pts/day potentialtotreatupto3pts/day
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Principle:Useofperitonealmembranetoremovesolutesandwater
RRToptionsinCOVID-19patients
Alternative:acuteperitonealdialysis
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peritonealcavity
hyperosmolarfluid
watersmallmolecules
PDinCOVID-19patients
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PD exchange
PDinCOVID-19patients
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PD exchange
PDinCOVID-19patients
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Vou
CAPDVolume:2–2.5LDwelltime:4–6hrs
Clearancecanbeincreasedbyusingfluidwithhigherglucoseconcentrationoradditionofotherosmoticallyactivesubstances
PDinCOVID-19patients
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CAPD continuousambulatoryperitonealdialysis: 4manualexchangesadaywithfluidleftin peritonealcavityinbetween
APD automatedperitonealdialysis:
usingamachinethatmovesfluidinandout oftheabdomenwhilstpatientisasleep
PDinCOVID-19patients
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PDinCOVID-19patients
Acuteperitonealdialysis
Advantages Disadvantages
continuousRRT needforperitonealcatheter
noneedforHD/CRRTmachine needfor’kit’noneedforanticoagulation limitedcontroloffluidremoval
establishedtechniqueincriticallyillpatientsinsomecountries(ieprotocolsavailable)
needfortraining/education
noneedforvascularaccess riskofacuteleak(espinproneposition)riskofperitonitis
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PDinCOVID-19patients
Acuteperitonealdialysis
Advantages Disadvantages
continuousRRT needforperitonealcatheter
noneedforHD/CRRTmachine needfor’kit’noneedforanticoagulation limitedcontroloffluidremoval
establishedtechniqueincriticallyillpatientsinsomecountries(ieprotocolsavailable)
needfortraining/education
noneedforvascularaccess riskofacuteleak(espinproneposition)riskofperitonitis
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RRTduringCOVID-19pandemic
Challenges• ChallengesrelatedtoacuteCOVID-19disease(hyperinflammation,
pro-coagulantstate)
• Limitedresources-->potentialneedtoadaptRRTplans(environment,machines,consumables,staff)
• Adoptionofunfamiliartechniques• Urgentneedforcontinuouseducation/audit/researchduringbusy
times• Increasedlevelof‘stress’atthebedside(physical,emotional,moral,
PPE,lessexperiencedstaff)• Preparednesstochangeplansquickly
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RRTduringCOVID-19pandemic
Challenges• ChallengesrelatedtoacuteCOVID-19disease(hyperinflammation,
pro-coagulantstate)
• Limitedresources-->potentialneedtoadaptRRTplans(environment,machines,consumables,staff)
• Adoptionofunfamiliartechniques• Urgentneedforcontinuouseducation/audit/researchduringbusy
times• Increasedlevelof‘stress’atthebedside(physical,emotional,moral,
PPE,lessexperiencedstaff)• Preparednesstochangeplansquickly
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RRTduringCOVID-19pandemic
Challenges• ChallengesrelatedtoacuteCOVID-19disease(hyperinflammation,
pro-coagulantstate)
• Limitedresources-->potentialneedtoadaptRRTplans(environment,machines,consumables,staff)
• Adoptionofunfamiliartechniques• Urgentneedforcontinuouseducation/audit/researchduringbusy
times• Increasedlevelof‘stress’atthebedside(physical,emotional,moral,
PPE,lessexperiencedstaff)• Preparednesstochangeplansquickly
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RRTduringCOVID-19pandemic
Challenges• ChallengesrelatedtoacuteCOVID-19disease(hyperinflammation,
pro-coagulantstate)
• Limitedresources-->potentialneedtoadaptRRTplans(environment,machines,consumables,staff)
• Adoptionofunfamiliartechniques• Increasedlevelof‘stress’atthebedside(physical,emotional,moral,
PPE,lessexperiencedstaff)• Preparednesstochangeplansquickly• Urgentneedforcontinuouseducation/audit/researchduringbusy
times
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RRTduringCOVID-19pandemic
Challenges• ChallengesrelatedtoacuteCOVID-19disease(hyperinflammation,
pro-coagulantstate)
• Limitedresources-->potentialneedtoadaptRRTplans(environment,machines,consumables,staff)
• Adoptionofunfamiliartechniques• Increasedlevelof‘stress’atthebedside(physical,emotional,moral,
PPE,lessexperiencedstaff)• Preparednesstochangeplansquickly• Urgentneedforcontinuouseducation/audit/researchduringbusy
times
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RRTduringCOVID-19pandemic
Challenges• ChallengesrelatedtoacuteCOVID-19disease(hyperinflammation,
pro-coagulantstate)
• Limitedresources-->potentialneedtoadaptRRTplans(environment,machines,consumables,staff)
• Adoptionofunfamiliartechniques• Increasedlevelof‘stress’atthebedside(physical,emotional,moral,
PPE,lessexperiencedstaff)• Preparednesstochangeplansquickly• Urgentneedforrapideducation/audit/researchduringbusytimes
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RRTduringCOVID-19pandemic
Teamworkidentificationofskillmix
collaborationwithotherteams(renal,paeds)
Equipment/consumables• machines(CRRT,mobileHD,PDmachines)
• consumables
• compatibilityofkit
• accesstoROunits/mobileROunits
• alternativestocommercialfluids
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RRTduringCOVID-19pandemic
Patientselection• absolutecriteriaforinitiationofRRT• identificationofpatientssuitableforintermittentRRT(HD,PIRRT)
Preservationofequipment/consumables/staff• intermittenttherapiesversusCRRT
• HDvia“plumbedwatersystem”ormobileRO
• useof“home-made”dialysisfluid(usualpracticeinmanycountries)
• optimisationoftechniquestomaintainfilterpatency
• criteriaforweaning/discontinuationofRRT• identificationofpatientssuitablefortransfertorenalunit
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Filterpatency
190-215µm
35-50µm
Ahumanhairhasathicknessofabout0.09mm=90µm
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Blood
ultrafiltrate
Hkt
Filterpatency
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Innersurfaceofdialyzermembraneduringhemodialysistherapy:densefibrinnetworkwithlargeamountsofaggregatederythrocytesdespiteheparin
HofbauerRetal,KI1999;56,1578–1583Effectofanticoagulationonbloodmembraneinteractions
Filterpatency-clotting
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IbaTetal,2020
Hyperinflammationandclotting
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Protein
Filterpatency-clogging
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Protein
Filterpatency-clogging
protein“cake”
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Bloodcomponentsaccumulateinsidetheporesofthemembraneandblockthepores
Permeabilityandultrafiltrationareimpaired
Membraneclogging Clotsformandblockthelumenofthefilter
Flowisimpaired
Membraneclotting
Filterpatency–cloggingvsclotting
HighprevalenceofcloggingandclottinginCOVID-19Prevention:anticoagulation
reductionofUFrate switchfromHFtoHD
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Strategiestokeepfilterpatent• Haemodilution(pre-dilution/regularsalineflushes)• Anticoagulation
Heparin(systemicvsviacircuit,unfractionatedvsLMWH)
Epoprostenol
Regionalanticoagulation(citrate)
Others(argatroban,hirudin,fondaparinux)
Combinations:citrate&heparin heparin&epoprostenol
• Goodvascularaccess!
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Vascularaccess
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CVVHDLowerbloodflowrate(100-150ml/min):12Fr
CVVHFHigherbloodflowrates(~200-250ml/min):12Fr
IntermittentHDHighbloodflowrate(≥200-350ml/min): 12-14Fr
Mrozek et al. Annals of Intensive Care 2012
Vascularaccess
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OtherstrategiestopreventRRT
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OtherstrategiestopreventRRT
• preventionofAKI
• loopdiureticsforfluidoverload
• minimisationoffluidintakeinbetweenRRTsessions
• lowKfeed
• K-binders
• NaHCO3formetabolicacidosis
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Roleofbloodpurification
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IbaTetal,2020
Roleofbloodpurification
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Roleofbloodpurification
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COVID-19
Cytokine removal
Crosstalk Interventions
Pore density
Cytokine Removal
Organ Crosstalk
Cytokine storm
Albumin 66 kDa
MCO
Myoglobin 17 kDa β2MG 12 kDa
Pore
den
sity
Roleofbloodpurification
AKI
RRT
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Otheressentials
Mostimportantweapons:teamworkknowledgeresilience
Thereisnouniversalplan!CircumstanceschangequicklyPreparednessandflexibilityareessential
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Conclusions
• Officialguidelinessuggest”standardRRT”
• Challengesdueto: frequentclotting/clogging limitedresources adoptionofalternativemethods
• Roleofbloodpurificationunknown
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Thankyou