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3/20/2013 1 THERAPEUTIC APHERESIS J. Sennesael Department of Nephrology, UZ Brussel 23-03-2013 Presentation Overview Definition of therapeutic apheresis Apheresis methods Mechanism of action of therapeutic plasma exchange (TPE) Kinetics of TPE Indications for TPE TPE in renal diseases TPE in neurological diseases Complications of TPE DEFINITION OF THERAPEUTIC APHERESIS

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  • 3/20/2013

    1

    THERAPEUTIC APHERESIS

    J. Sennesael

    Department of Nephrology, UZ Brussel

    23-03-2013

    Presentation Overview

    Definition of therapeutic apheresis

    Apheresis methods

    Mechanism of action of therapeutic plasma exchange (TPE)

    Kinetics of TPE

    Indications for TPE

    TPE in renal diseases

    TPE in neurological diseases

    Complications of TPE

    DEFINITION OF THERAPEUTIC APHERESIS

  • 3/20/2013

    2

    Definition of Therapeutic Apheresis

    Procedure name Description

    Leukocytapheresis A procedure in which the WBCs are separated from the blood.

    The cells may be discarded (acute leukemia) or used for

    transfusion (hematopoietic progenitor cells)

    Thrombocytapheresis A therapeutic procedure in which platelets are removed and

    discarded from a thrombocythemic patient.

    RBC exchange A therapeutic procedure in which abnormal RBCs are removed

    and replaced by donated RBCs.

    Plasmapheresis A procedure in which plasma is separated from the blood and

    returned without replacing the removed volume.

    Plasma exchange A procedure in which a large volume of plasma is removed,

    usually 1-1.5 plasma volumes. The removed plasma is replaced

    with a replacement fluid.

    LDL apheresis A type of plasmapheresis procedure in which the removed

    plasma is modified to remove LDL cholesterol and then

    returned to the patient.

    Apheresis < gr. aphaeresis: taking away, to carry

    Commonly performed apheresis procedures

    Adapted from JL Winters, Hematology 2012

    APHERESIS METHODS

    TPE Methods

    Centrifugation-based TPE

    Centrifugal force separates

    cells from plasma based on

    their specific gravity

    Hematology/Bloodbank

    Filtration-based TPE

    High permeable membrane

    separates plasma from

    cellular components

    Nephrology

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    3

    Filtration-based TPE

    Standard dialysis machine

    HDF mode, low volume

    High permeable membrane (MWC0 3000 kD)

    High Permeable Membranes for TPE

    Gambro plasma filter

    PF1000 (0.15 m², ETO)

    Filtration 25 ml/min (1.5 l/h)

    Asahi plasmaflo

    Polyethylene (copolymer coating)

    OP-02 (0.2 m², gamma)

    Filtration 20 - 40 ml/m

    OP-5W (0.50 m², gamma)

    Filtration 40-60 ml/m

    (1 unit FFP 250 ml)

    Apheresis Methods

    Method Pro Con

    • No loss of platelets

    • Less extracorporeal

    volume

    • Heparin (usually)

    • Dialysis catheter needed

    • Substance removal

    depends on membrane

    • Higher blood flow rate

    • Loss of platelets

    • Greater extracorporeal

    volume

    • Citrate anticoagulation

    • Peripheral blood line

    sufficient

    • Can separate any blood

    component

    • Lower blood flow rate

    Centrifugation

    Filtration

  • 3/20/2013

    4

    MECHANISM OF ACTION OF TPE

    Mechanism of Action of Plasma Exchange

    1. Removal of known pathogenic substances from plasma

    Autoantibody: Thrombotic thrombocytopenic purpura (TTP), immune thrombocytopenic purpura (ITP), myasthenia gravis

    (MG), Guillain-Barré syndrome (GBS), neuromyelitis optica (NMO), anti-GBM glomerulonephritis (and

    Goodpasture’s syndrome), ANCA-associated glomerulonephritis (and Wegener’s granulomatosis),

    antiphospholipid crisis etc.

    Probable autoantibody:

    Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), multiple sclerosis (MS), etc.

    Antigen-antibody complexes:

    Hepatitis C vasculitis, systemic lupus erythematosus, etc.

    Alloantibody:

    Transplant sensitization, transplant rejection (humoral), transfusion reactions, etc.

    Paraproteins:

    Waldenstrom’s, hyperviscosity, light-chain neuropathy, light-chain glomerulopathy, myeloma cast

    nephropathy, etc.

    Non-Ig proteins:

    Focal segmental glomerulosclerosis (FSGS)

    Endogenous toxins:

    Hypercholesterolemia, liver failure, systemic inflammatory response syndrome (SIRS), etc.

    Exogenous poisons:

    Amanita (mushroom), drugs, etc.

    DM Ward, J Clin Apher 2011

    Mechanism of Action of Plasma Exchange

    2. Restoration of deficient factors

    ADAMTS 13 in TTP

    Complement factors in aHUS

    3. Immunomodulatory effects

    Th1/Th

    2 modulation: shift towards TH

    2

    (1)

    Suppression of IL-2 & IFN-gamma production(2)

    Increased Concanavalin A-induced suppressor function

    (1) H Goto, Ther Apher 2001; (2) S Shariatmadar, Am J Hematol 2005

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    5

    KINETICS OF TPE

    Kinetics of Plasma Exchange

    DM Ward, J Clin Apher 2011

    Plasma Volume Exchange

    Plasma Volume Exchange Percent Removed

    0 100%

    0.5 39.3%

    1.0 63.2%

    1.5 77.7%

    2.0 86.5%

    2.5 91.8%

    3.0 95.0%

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    Calculating Volumes

    EXCHANGE VOLUME CALCULATED RELATIVE TO THE

    ESTIMATED PLASMA VOLUME (EPV):

    EPV(L) = 0.07 x weight (kg) x (1-hematoctrit)

    Ex: 80 kg male with Hct of 30 (0.3):

    EPV = 0.07 x 80 x 0.7 = 3.92 liter

    1.5 plasma volumes = 3.92 x 1.5 = 5.9 liter

    60 kg female with Hct of 35 (0.35):

    EPV = 0.07 x 60 x 0.65 = 2.73 liter

    1.5 plasma volumes = 2.73 x 1.5 = 4.1 liter

    Number and Frequency of Treatments

    Underlying disease

    (daily in TTP, severe anti-GBM disease)

    Type of molecule

    IgM (75% intravascular): easily removed (90% in 2 sessions)

    IgG (45% intravascular): less easily removed (90% in 5 sessions)

    rebound phenomenon

    Desired endpoint

    (clinical improvement; reduction of specific substance)

    IN GENERAL: 5-7 sessions over 10 days, then pause and reassess

    M Ward, J Clin Apher 2011

    Removal of Normal Plasma Components

    Coagulation factors

    Decline in F VIII, F IX, VWF (till 4 hours post PE)

    in F V, F VII, F X (till 24 hours post PE)

    Fibrinogen: 66% of pre-apheresis levels by 72 hours

    Inhibitors of coagulation

    Antithrombin

    Pseudocholinesterase

    Reduced metabolism of some drugs

    Prolonged neuromuscular blockade

    Antimicrobial Abs

    False negative test for infectious diseases

    Drugs

    Ceftriaxone, ceftazidime, tobramycin, cisplatin, vincristine, diltiazem,

    Verapamil, propoxyphene, propranolol, rituximab, IFN-alfa

    Adapted from JL Winters, Hematology 2012

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    7

    Replacement Fluids

    5% Albumin or Albumin/Saline Fresh frozen plasma

    • No depletion coagulopathy

    • No depletion of IgG

    • Citrate-related problems

    (hypocalcemia, metabolic alcalosis)

    • Anaphylactic reactions

    • Viral transmission

    • False positive testing for viral Ab

    • No viral transmission

    • Rare reactions

    • Expensive

    • Depletion coagulopathy

    • Depletion IgG

    • Hypokalaemia

    INDICATIONS FOR TPE

    American Society for Apheresis

    Journal of Clinical Apheresis

    Volume 25- Issue 3- 2010

    Guidelines on the use of Therapeutic

    Apheresis in clinical practice – Evidence

    based approach (Szczepiorkowski ZM et al.)

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    8

    ASFA Guidelines

    Categories – Redefinition of the Indications

    Evidence-Based Assessment of the

    Therapeutic Apheresis Literature

    Recommendations-Sub-Categories

    Focus on Treatment Approach to a given

    Clinical Condition

    Fact Sheets

    ASFA Categories

    Category I: Apheresis is accepted as

    first-line therapy

    (Primary of in conjunction with other modes

    of treatment)

    GRADE 1A: Strongly recommended, high quality evidence

    GRADE 1B: Strongly recommended, moderate quality evidence

    GRADE 1C: Strongly recommended, low to very low quality

    evidence

    ASFA Categories

    Category II: Apheresis is accepted as

    second-line therapy, either as

    standalone treatment or in conjunction

    with other modes of treatment

    GRADE 2A: Weak recommended, high quality evidence

    GRADE 2B: Weak recommended, moderate quality evidence

    GRADE 2C: Weak recommended, low to very low quality

    evidence

  • 3/20/2013

    9

    ASFA Categories

    Category III: Optimum role of Apheresis

    is not established. Decision making

    should be individualized

    Category IV: Published evidence

    demonstrates or suggests Apheresis

    to be ineffective or harmful. IRB

    approval is desired

    Indications for TPE

    Renal

    ANCA-associated RPGN (dialysis dependence, DAH)

    Anti-GBM disease (dialysis independence, DAH)

    Recurrent FSGS

    aHUS (auto-Ab to factor H)

    Ab-mediated transplant rejection

    Neurological

    Guillain-Barré syndrome

    Chronic idiopathic demyelinating polyneuropathy (CIDP)

    Myasthenia gravis

    Paraproteinemic polyneuropathy (IgG/IgA; IgM)

    Adapted from Szczepiorkowski ZM, 2010

    Category I: Standard acceptable therapy

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    Autoimmune

    Cryoglobulinemia (severe, symptomatic)

    Haematological

    Thrombotic thrombocytopenic purpura (TTP)

    Hyperviscosity in monoclonal gammopathies

    Indications for TPE

    Adapted from Szczepiorkowski ZM, 2010

    Category I: Standard acceptable therapy

    Indications for TPE

    Renal

    aHUS (Complement factor gene mutation)

    ABO incompatible kidney transplantation

    Desensitisation for DSA

    Myeloma cast nephropathy

    Neurological

    Acute disseminated encephalomyelitis

    Chronic focal encephalomyelitis (Rasmussen’s)

    Lambert-Eaton myasthenic syndrome

    Multiple Sclerosis (acute disease, steroid resistant)

    Neuromyelitis Optica (Devic’s syndrome)

    Adapted from Szczepiorkowski ZM, 2010

    Category II: Sufficient evidence to suggest

    efficacy as adjunctive therapy

    Autoimmune

    Catastrophic anti-phospholipid syndrome

    Cryoglobulinemia (secondary to HCV)

    Haematological

    Pure red cell aplasia

    Cold agglutinin disease (life threatening)

    Red cell alloimmunisation in pregnancy

    Poisoning/overdosing

    Mushroom poisoning

    Phytanic acid storage disease (Refsum’s disease)

    Indications for TPE

    Adapted from Szczepiorkowski ZM, 2010

    Category II: Sufficient evidence to suggest

    efficacy as adjunctive therapy

  • 3/20/2013

    11

    Indications for TPE

    Renal

    Immune complex RPGN

    Nephrogenic systemic fibrosis

    Category III: Inconclusive evidence of

    efficacy or uncertain risk/benefit ratio

    Neurological

    Multiple sclerosis (chronic progressive)

    Paraneoplastic neurologic syndromes

    Haematological

    Autoimmune hemolytic and aplastic anemia

    TMA (calcineurininhibitors, HSCT)

    Autoimmune

    Systemic sclerosis

    Adapted from Szczepiorkowski ZM, 2010

    Indications for TPE

    Category III: Inconclusive evidence of

    efficacy or uncertain risk/benefit ratio

    TPE can be considered for the following occasions:

    1. Standard therapies have failed

    2. Disease is active or progressive

    3. There is a marker to follow

    4. It is agreed that it is a trial of TPE and when to stop

    5. Possibility of no efficacy is understood by the patient

    Indications for TPE

    Category IV: Lack of efficacy in controlled trials

    Renal

    Goodpasture syndrome (dialysis dependent, no DAH)

    HUS (diarrhea associated, typical)

    Haematological

    TMA (gemcitabine, quinine)

    Coagulation factor inhibitors

    Autoimmune

    Rheumatoid arthritis (refractory)

    Dermato-/polymyositis

    Pemphigus

    Neurological

    Amyotrophic lateral sclerosis

    Inclusion body myositis

    Adapted from Szczepiorkowski ZM, 2010

  • 3/20/2013

    12

    TPE IN RENAL DISEASES

    TPE in renal diseases

    Thrombotic microangiopathy

    Anti-glomerular basement membrane disease

    ANCA-associated vasculitis

    Hyperviscosity syndromes

    Cryoglobulinemia

    Recurrent FSGS

    Antibody mediated rejection

    Thrombotic Microangiopathy

    Clinical manifestations Laboratory abnormalities

    Renal failure

    Neurologic deficits

    Fever Thrombocytopenia

    (No DIC)

    Microangiopathic

    hemolytic anemia

    schistocytes

    LDH

    haptoglobin

    TTP/HUS

  • 3/20/2013

    13

    TPE in Thrombotic Microangiopathy

    Subgroup Response to TPE (%)

    TTP

    Primary

    Hereditary (ADAMTS 13 activity < 10%)

    Idiopathic or acquired

    80-90

    80-90

    Secondary

    Drugs (except mitomycin C)

    Collagen vascular disease

    Infection (except E. coli)

    Pregnancy

    Pancreatitis

    Stem cell transplant

    Malignancy

    Malignant hypertension

    80-90

    50-70

    50-70

    50-70

    50-70

    0

    0

    0

    Adapted from Clark WF, Sem Dial 2012

    TPE in Thrombotic Microangiopathy

    Subgroup Response to TPE (%)

    HUS

    Primary: atypical HUS (aHUS)

    Complement factor H, I or B

    C3 convertase, thrombomodulin

    Membrane co-factor protein (MCP-CD46)

    50-70

    50-70

    0

    Secondary: diarrheal HUS (DHUS)

    E. coli O157: H7 (STEC) 0

    Adapted from Clark WF, Sem Dial 2012

    Thrombotic Microangiopathy: Adult

    TTP/HUS

    Test ADAMTS 13

    Stool cultures E. coli O157: H7

    Start TPE

    DIC

    Test INR, PT, D-dimer

    Secondary (50%)

    TPE 50-70% response

    Collagen vascular

    disease, drugs,

    pregnancy,

    pancreatitis

    NO TPE for stem

    cell transplant,

    malignancy,

    mitomycin C

    Idiopathic (50%)

    TPE 80-90%

    response

    Stool + DHUS

    Supportive

    (volume repletion)

    TPE if severe acute

    onset/neurologic

    deficit

    DIC

    Search sepsis

    or malignancy

    Adapted from Clark WF, Sem Dial 2012

  • 3/20/2013

    14

    Thrombotic Microangiopathy: Child

    Adapted from Clark WF, Sem Dial 2012

    Bloody diarrhea

    Stool culture

    E. coli O157: H7

    No diarrhea

    Test complement

    D-HUS

    Conservative

    (volume repletion)

    Infusion FFP (?)

    a-HUS

    TPE

    Eculizumab

    DIC

    Test INR, PT, D-dimer

    DIC

    Search sepsis

    or malignancy

    TPE for TTP

    ASFA Indication: category I

    Rationale: TPE is superior to FFP infusions1,2

    Replacement Fluid: FFP

    Interval/duration:

    TPE < 24 hours of presentation

    1.0-1.5 plasma volume (60-75 ml/kg) daily

    (platelets > 150x103; LDH normal)

    Adjunctive therapy: corticosteroids(3)

    Standard dose (1 mg/kg) > high dose (10 mg MPS/kg/day x3)

    followed by 2.5 mg/kg/day (CR 53.4% vs 23.4%, p = 0.03)

    (1) GA Rock; NEJM 1991

    (2) M Michael, Cochrane Database Syst Rev 2009

    (3) SJ Brunskill, Transf Med 2007

    TTP: Response to Initial Therapy

    Rapid response (1-2 days)

    Non-focal neurologic symptoms

    Moderate response (3-10 days)

    Thrombocytopenia

    Parameters of hemolysis

    Slow response (weeks-months)

    Anemia

    Renal impairment (unpredictable, often

    incomplete)

    Treatment requires persistence and patience

  • 3/20/2013

    15

    TTP: Follow-up and Outcome

    Follow-up

    Duration of initial treatment is undefined

    Monitor blood cell count and LDH

    Outcome

    Relapse rates 29-82%

    Chronic renal failure ( 25%)

    Long-term neurologic effects (incidence?)

    TTP: Relaps or Refractory Patients

    Continue/intensify TPE

    Rituximab(1)

    Initial 375 mg/m²

    Weekly (x4)

    Splenectomy?

    IVIG?

    (1) S Jasti, J Clin Apher 2008; I de la Rubia,Transf Apher 2012

    TPE for aHUS

    ASFA indication:

    Category I (factor H Ab)

    Category II (complement factor gene mutations)

    Rationale: no controlled trials, expert opinion(1)

    Replacement fluid: FFP

    Interval/duration:

    1.0-1.5 plasma volumes daily

    (platelets > 150 x 10³; LDH normal)

    5x/week for two weeks

    3x/week for two weeks

    Subsequently according to evolution

    Uncontrolled disease: eculizumab(2)

    (1) C Loirat, Pediatr Nephrol 2008

    (2) J Nürnberger, N Engl J Med 2009

  • 3/20/2013

    16

    Diarrheal HUS: Treatment

    Supportive care

    FFP infusion: no significant benefit(1)

    TPE: benefit in adults with severe acute

    onset D-HUS(2)

    (1) G Rizzoni, J Pediatr 1988

    (2) E Colic, Lancet 2011

    TPE in Anti-glomerular Basement

    Membrane Disease

    ASFA indication:

    Serum creatinine < 500 µmol/l: category I

    Diffuse alveolar hemorrhage (DAH) irrespective of serum creatinine: category I

    Rationale for TPE:

    Lower post therapy serum creatinine, lower incidence of ESRD, more rapid

    decline of anti-GBM(1)

    Less severe pulmonary hemorrhage(2)

    Replacement fluid: albumin

    (FFP 2–4 units last portion of exchange if DAH or kidney biopsy)

    Interval/duration:

    TPE 1.0-1.5 plasma volume daily/every other day minimum 14 days

    Consider continuing TPE if serum creatinine & anti-GBM level not significantly

    declined

    Adjunctive therapy: corticosteroids, cyclophosphamide

    (1) JB Levy, Ann Int Med 2001

    (2) CO Savage, BMJ 1981

    TPE in ANCA-associated Vasculitis

    ASFA indication:

    RPGN (Screat > 5.7 mg/dl); dialysis dependence(1)

    : category I

    Diffuse alveolar hemorrhage (DAH)(2)

    : category I

    Rationale for TPE: TPE is superior to IV MPS pulses in patients with

    severe renal involvement:

    renal recovery at 3 months: 69% vs 50%

    progression to ESRD: 24% risk reduction

    Replacement fluid: albumin

    (FFP 2-4 U last portion of exchange if DAH or kidney biopsy)

    Interval/duration

    TPE 1.0-1.5 plasma volume

    6-9 treatments over 2 weeks

    Daily initially if concomitant anti-GBM

    Adjunctive therapy: corticosteroids, cyclophosphamide

    (1) D Jayne, JASN 2007

    (2) PJ Klemmer, Am J Kidney Dis 2003

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    TPE in Hyperviscosity Syndromes

    ASFA indication: neurological symptoms (convulsions, coma)

    in monoclonal gammopathies or cryoglobulinemia: category I

    Rationale:

    Prevalence hyperviscosity symptoms with 4 and 5 cp = 67%

    and 75%(1)

    One single TPE (1.0-1.5 plasma volume) reduces plasma

    viscosity by 20-30%(2)

    Replacement fluid: albumin (1/3)/saline (2/3)

    Interval/duration:

    Daily until acute symptoms abate (1-3 TPEs)

    Maintenance 1 TPE every 1-4 weeks ( clinical symptoms)

    Adjunctive therapy: chemotherapy

    (1) BD Adams, Emerg Clin N Am 2009

    (2) M Ballestri, 2007

    TPE for Recurrence of Primary FSGS

    ASFA indication: posttransplant recurrence of idiopathic FSGS:

    category I

    Rationale:

    TPE + high dose cyclosporine: 75% remission(1)

    Remission correlates with reduction of serum suPAR < 2000

    pg/ml(2)

    Replacement fluid: albumin or albumin/FFP

    Interval/duration:

    Daily for 3 days + 3 times/week for 2 weeks (minimum 9)

    Tapering guided by degree of proteinuria

    Adjunctive therapy: corticosteroids, cyclosporine, rituximab(?)

    (1) ME Schachter, Clin Nephrol 2010

    (2) C Wei, Nat Medicine 2011

    TPE for Cryoglobulinemia

    (1) EM Berkman, Transfusion 1980

    (2) GE Russo, Transf Sci 1996

    ASFA indication:

    Severe organ damage (skin, kidney, neuropathy): category I

    Cryocrit not to be used as criterion

    Rationale:

    No RCT

    TPE associated with 70-80% clinical improvement(1,2)

    Replacement fluid: albumin or plasma

    Interval/duration:

    1.0-1.5 plasma volume exchange every 1-3/days

    Reevaluate after 8 procedures

    Weekly/monthly according to symptoms

    Warm room and warmed lines/replacement solutions

    Adjunctive therapy: according to underlying disease

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    TPE for Antibody Mediated Rejection (AMR)

    ASFA indication: antibody mediated rejection: category I

    Banff criteria 2001: (1) DSA; (2) allograft histology (PMN glomerular/peritubular);

    (3) allograft IF (C4d peritubular capillaries)

    Rationale:

    TPE alone (removal DSA): no benefit in RCT(1)

    Immunoadsorption: superior evidence(2)

    TPE + IVIg (inhibition of residual DSA): 50-90% reversal of AMR and improved

    graft survival (70-80%)(3)

    Replacement fluid: albumin or albumin/saline

    Interval/duration: no evidence based protocol

    Set number of TPE, usually 5 or 6, daily or every other day

    TPE procedures based on renal function, decrease in DSA

    Low dose IVIg (0.1-0.4 g/kg) at end of each procedure

    Adjunctive therapy: corticosteroids, MMF, rituximab, bortezomib

    (1) HJ Gurland, Kidney Int Suppl 1983

    (2) GA Bohmig, Am J Transplant 2007

    (3) C Lefaucheur, Am J Transplant 2009

    TPE IN NEUROLOGICAL DISEASES

    TPE in neurological diseases

    Guillain-Barré syndrome

    Chronic inflammatory demyelinating

    polyneuropathy (CIDP)

    Myasthenia gravis

  • 3/20/2013

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    TPE for Guillain-Barré Syndrome

    ASFA indication: severe disease impairing independent walking or

    requiring mechanical ventilation: category I

    Rationale:

    Anti-LOS/ganglioside antibodies

    4 RCT: improvement in disability and ventilation need within 4

    weeks(1-3)

    Replacement fluid: albumin/saline

    Interval/duration:

    1.0-1.5 plasma volume every other day

    5 to 6 procedures over 2 weeks

    Alternative therapy: IVIG equally efficacious as TPE(4)

    0.4 g/kg for 5 consecutive days

    (1) M.Farkkila, Neurology 1987

    (2) Guilliain Barré Study group, Neurology 1985

    (3) French Cooperative Group on Plasma exchange in Guillain Barré Syndrome , Ann Neurol

    1987 and 1997

    (4) RA Hughes, Cochrane Syst Rev 2001

    TPE for Chronic Inflammatory

    Demyelinating Polyneuropathy (CIDP)

    ASFA indication: short term treatment of CIDP: category I

    Rationale:

    Autoantibodies against proteins and glycolipids of peripheral nerves

    2 RCT: improvement nerve conduction and neurologic-disability

    score(1-2)

    Replacement fluid: albumin/saline

    Interval/duration:

    1.0-1.5 plasma volume, 2 to 3 times/week until improvement

    (4-6 weeks)

    Taper as tolerated

    Adjunctive therapy:

    Corticosteroids, azathioprine, MMF, CsA

    IVIG equally efficacious as TPE: 0,4 g/kg once a week, x 3

    0,2 g/kg once a week, x 3

    (1) PJ Duyck, NEJM 1986

    (2) AF Hahn, Brain 1996

    (3) PJ Duyck, Ann Neurol 1994

    TPE for Myasthenia Gravis

    ASFA indication: myasthenic crisis and pre-thymectomy: category I

    Rationale:

    Autoantibodies towards antigens in the postsynaptic membrane

    (AChR: 80-90%; MuSK: 10%)

    NO RCT

    Replacement fluid: albumin/saline

    Interval/duration:

    1.0-1.5 plasma volume every other day

    5 tot 6 procedures over 2 weeks

    Adjunctive therapy:

    Thymectomy, acetylcholinesterase inhibitor, corticosteroids,

    azathioprine, MMF

    IVIG equally efficacious as TPE(1)

    :

    0.4 g/kg/day on 3 to 5 consecutive days

    (1) P Gadjos, Ann Neurol 1997

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    COMPLICATIONS OF TPE

    General Complications

    Catheter-related

    Thrombosis/hemorrhage; infection; pneumothorax

    Anticoagulation-related

    Bleeding risk

    Pulmonary embolism if reinfused blood not properly anticoagulated

    Oncotic pressure-related

    Hypotension if hypo-oncotic fluid replacement

    Pulmonary edema if serum protein much higher post TPE

    Elimination of drugs

    Drugs with high protein binding: antibiotics, anti-epileptic

    drugs, diltiazem, thyroxin, cyclophosphamide, azathioprine

    Biologicals: administer after TPE

    Complications when substituting

    albumin and/or saline

    Depletion coagulopathy

    1 plasma exchange: coagulation factors 60%; recovery 48 hours

    Multiple treatments/week: pronounced depletion; recovery > 72

    hours

    if bleeding risk (Goodpasture, postbiopsy, …): substitute 2-4 FFP

    Depletion of immunoglobulins

    1 plasma exchange:serum Ig 60%; total body Ig stores 20%

    Multiple treatments/concomittant IS: risk opportunistic infections

    serum Ig < 500 mg/dl: IVIG 0.1-0.4 mg/kg

    Hypokalemia

    25% reduction in K+ post TPE (intravasal dilution)

    history arrhythmia/digoxin use: add 4 mmol K+/liter albumin

    5 % Albumin (Na+: 145 mmol/L; K+:

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    Complications when substituting

    albumin and/or saline

    Hypocalcemia

    Pyrogenic reactions

    Anaphylactoid reactions

    Flushing, hypotension, abdominal cramps in patients with

    ACE-I

    5 % Albumin (Na+: 145 mmol/L; K+:

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    Potential Causes for Hypotension

    during TPE

    Cause Prevention/Treatment

    Hypovolemia

    Inadequate volume replacement; hypo-

    oncotic fluids

    • Slow removal of plasma

    • Replace with 5% albumin, FFP,

    colloid (60-80%) + saline (20-40%)

    Anaphylaxis

    Reaction to plasma components

    Membrane bio-incompatibility

    • Minimize FFP

    • (Pre)treatment with antihistamines,

    corticosteroids

    Cardiac arrhythmia

    Citrate-induced hypocalcemia

    Hypokalemia (digitalis)

    • Minimize FFP, slow infusion

    • IV calcium prophylaxis

    Bradykinin reactions • Avoid ACE-I

    TRALI • Minimize FFP

    Hemorrhage

    Access-related

    Anticoagulation, depletion coagulopathy

    • Adequate anticoagulation

    • Adequate FFP

    Pulmonary embolus • Adequate anticoagulation

    Adapted from Kaplan A, Seminars in Dialysis, 2012

    References

    Kaplan A. Am J Kidney Dis.

    2008;52:1180-1196

    Szczepiorkowski ZM, Winters JL.

    J Clin Apher. 2010;25:83-177

    Seminars in Dialysis. Vol. 25, Nr. 2

    (March-April), 2012