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INTRODUCTION
• Hepato Renal Syndrome (HRS) is a functional and reversible
  form of renal failure , in patients with advanced chronic liver
  disease.
• Interactions between systemic and portal hemodynamics causes
  intense renal vasoconstriction .
• May develop spontaneously without known precipitating factors
  but there are known triggers.
• To be diagnosed based on criteria.
• Worst prognosis of all the complications of cirrhosis.
• Terlipressin is the drug of choice in treatment.
• Liver transplantation is the definitive cure for patients.
• Recently liver dialysis by means of albumin bound membranes is
  providing a means of extracorporeal liver support.
History
• Frerichs ,Flint - first report of renal failure in the
  absence of significant renal histologic changes,in
  chronic liver diseases.
• Hecker, Sherlock (1956) – Pathogenesis of
  hepatorenal syndrome.
• Epstein et al - splanchnic ,systemic vasodilation
  together with intense renal vasoconstriction is
  the pathophyisological hallmark of HRS.
• 1970 s -TERMINAL FUNCTIONAL RENAL FAILURE
• 2007 -Molecular Adsorbent Recirculating System.
Alternative names
•   Heyd's syndrome
•   Flint's syndrome
•   Frerichs' syndrome
•   Bile nephrosis,
•   Cholemic nephrosis,
•   Hepatonephrite,
•   Hepatonephritis serosa acuta,
•   Leber-Nieren-Syndrom (German),
•   Nephrite fonctionelle (French).
Case
• A 35-year-old male,k/c/o alcoholic cirrhosis, ascites and a
  history of alcoholic hepatitis presented to casualty for
  management of his cirrhosis and was diagnosed with new-
  onset renal insufficiency upon admission.
• no history of renal dysfunction ,diabetes mellitus. He had
  blood transfusions at another hospital 5 days previously after
  having suffered a gastrointestinal hemorrhage.
• No h/o SBP or recent treatment with nephrotoxic drugs. Upon
  admission, he was taking pentoxifylline 400 mg three times
  daily (tid) for alcoholic hepatitis, and furosemide 80 mg daily
  (qd) and spironolactone 200 mg qd for his cirrhosis with
  ascites.
• Physical examination revealed jaundice, ascites, and spider
  angiomas on his chest. Viral hepatitis serologies were
  negative, but ultrasound revealed a nodular liver and
  splenomegaly. No evidence of chronic renal parenchymal
  disease or obstructive uropathy. Ascitic fluid analysis
  demonstrated a SAAG of >1.1g/dl.
• Diuretics were discontinued, and intravascular volume
  replacement was provided by administration of both 1.5 l of
  isotonic saline and a total of 120 g of human albumin
  administered over several doses but the patients renal
  function continued to worsen.
• A DIAGNOSIS OF HEPATORENAL SYNDROME WAS MADE.
CAUSES OF RENAL FAILURE IN CIRRHOSIS

                                 H
•   Large volume paracentesis    Y
•   Shock                        P
                                 O
•   Sepsis                       T
•   Nephrotoxic Medications      E    Renal failure
•   Intrinsic renal diseases     N
•   Volume depletion secondary   S
     to diuresis.                I
                                 O
                                 N
Diagnostic Approach to Renal Failure in Cirrhotics
Renal failure in a pt with cirrhosis                  hold diuretics,offending medications
                                             YES      Trial of ntravascularvolumeexpander
ECF fluid losses;rapid/excessive diuretics            (albumin)if renal function ↑ses ,
                                                             h
Vomiting,diarrhoea,hemorrhage,recent,                 Diagnosis of prerenal failure is
LVP /hemodynamic changes due to use of                made
NSAIDS (or)ACEI                            YES
                        NO                               Toxic or ischemic renal failure
Recent use of nephrotoxicmedications
Hypotension(sepsis,hemorrhage)               YES          Suspected glomerular disease
                       NO                                 Depending upon clinical scenario
  Glomerular proteinuria&hematuria                        Further workup may include
  i.e.,dysmorphic RBCs and RBC cast                       Cryoglobulins C3,C4 and renal
                        NO             YES                biopsy
 Imaging (USG,CT scan)shows                      Suggestive of obstructive uropathy
 Hydronephrosis,urinary retention                Unless long standiing relief of obstruction
                        NO                       Should lead to improvement in
                                      YES        renalfunction
 Patient has evidence of Portal
                                                        Diagnosis of HRS can be
 Hypertension & serum
                                                        made
 creatinine>1.5mg/dl
IAC verbatim
• “Hepatorenal syndrome is a syndrome that occurs in
  patients with chronic liver disease, portal
  hypertension and advanced hepatic failure .It is
  characterised by impaired renal function, marked
  abnormalities in arterial circulation and activity of
  endogenous vasoactive systems . In the kidney ,there is
  marked renal vasoconstriction that results in low
  GFR. In the extrarenal circulation there is
  predominance of arteriolar vasodilation , that results
  in reduction of total systemic vascular resistance and
  arterial hypotension.A similar syndrome may also
  occur in the setting of acute live failure”.
                                       -IAC ,Chicago 1996
DEFINITION
• First systemic attempt to define HRS was made by
  International Ascites Club(1994)
• HEPATORENAL SYNDROME is a distinct form of
  fucntional acute/sub acute renal failure charecterised by
  severe renal vasoconstriction which develops in
  decompensated Cirrhosis or Acute liver failure,in the
  absence of uderlying renal pathology. (Clinics of
  North America;Expert consensus;1996)
• Recently updated to include Albumin as volume
  expander.
EPIDEMIOLOGY

• Incidence of HRS in patients with chronic liver disease is not
  well studied.
• 4% of patients admitted with decompensated cirrhosis.
• In a study of 234 non azotemic patients with liver disease who
  had ascites and cirrhosis,18% developed HRS at 1year and
  39% developed by 5 years.
• Retrospective studies indicate HRS is present in 17% of
  pts admitted to hospital with ascites,and in > 50% of
  cirrhotics dying from liver failure
• Some patients without ascites devolped the condition in the
  setting of acute fulminant hepatic failure.
Pathophysiology
• Four interrelated pathways have been implicated in the
  pathophysiology ..
• “Possible impact of each one of
  these pathways on renal
  vasoconstrcition and development of
  HRS varies from one patient to
  other .”
•   1.PERIPHERAL ARTERIAL VASODILATION
•   2.STIMULATION OF RENAL SNS
•   3.CARDIAC DYSFUNCTION
•   4.CYTOKINES ,VASOACTIVE MEDIATORS.
Cont..
• 1.PERIPHERAL ARTERIAL VASODILATION :
• Rational and simple explanation to the hemodynamic
  changes that takes place in cirrhosis ,HRS.
• Degree of hepatic decompensation              degree
  of hyperdynamic circulation ,
• Degree of hepatic decompensation               1/
  arterial BP.
• Reversal of HRS ,improvement of hemodynamics by
  systemic vasoconstriction gives support to this
  hypothesis.
Pathophysiology of HRS
                          CIRRHOSIS
                    splanchnic arterial vasodilation

                           arterial underfilling

             stimulation of systemic vasoconstrictors

                          renal vasoconstriction

late stage of cirrhosis               early stages of cirrhosis

  local vasodilators , local vasoconstrictors      systemic and local
                                                  vasodilators
  HEPATORENAL SYNDROME                        PRESERVED RENAL PERFUSION
Correlation between clinical features and
                 pathophysiology in HRS
                                                    HRS
                           diuretic refractory
                                     ascites
                ascites
Clinical
Physiological
          Portal HTN
                          Splanchnic vasodilation
                                       renal vasoconstriction
• 2.stimulation of renal SNS :
•     sympathetic tone in pts with cirrhosis.

• KOSTREVA et al vena caval ligation -- increased
    intrahepatic pressure -- renal sympathomimetic
    activity --wears after anterior hepatic nerves are cut.

• Severing renal ,hepatic,spinal nerves abolishes the
    response of decreased GFR ,RPF seen after
    hepatocyte swelling.
• 3.cardiac dysfunction :
• Myocardial contractility impaired.( cirrhosis )
• Diastolic dysfunction       cirrhosis progression
• Hyperdynamic state being present
• Cause is diseased liver ,reversible after TRx
• BNP , CVP           child pugh score ,ventricular wall
  thickness.
• Neurohormonal activity - growth ,fibrosis – disturbed
  relaxation .
• Inhibitory effect of TNF        ,NO on ventricular function.
Cardiac dysfunction is
masked by decreased
afterload in cirrhotic
patients .




Decreased cardiac output
• 4.cytokines ,vasoactive mediators:
• Not a sole player.
• NO,TNF ,endothelin , endotoxin,glucagon,increased PG s .
• Upregulation of e NOS activity,endotoxin ,inducible.
• Reduces pressor effect of vasoconstrictors.
• More in cirrhotics ,ascites.
• Renal vasoconstriction due to dimethylarginine - a natural
  NO inhibitor.
• Reduced cyclooxygenase activity in renal medullary tissue.
Precipitating factors
• In type I HRS ppting event identified in 70-100 % pts.
• More than one event in a patient.
• Bacterial infections
• Large volume paracentesis without albumin infusion.
  (15%)
• GI bleeding
• Acute alcoholic hepatitis. (25%)
• SBP - 20-30% develop HRS.
How ppt factor leads to renal failure?

• A.cytokine-induced aggravation of the circulatory
  dysfunction with further stimulation of the RAAS and SNS and
  worsening renal vasoconstriction.
• intrarenal vicious cycle that favors more renal vasoconstrictor
  release and impairs renal vasodilator synthesis .
• will progress to HRS even if the underlying precipitating event
  has been corrected.
• B.secondary to deterioration in cardiac function as a result of
  either the development of septic cardiomyopathy or
  worsening of a latent cirrhotic cardiomyopathy
DIAGNOSIS OF HRS
• Diagnosis of HRS is made on certain predefined
  criteria in the appropriate clinical setting
• Increasing s.creatinine in patients with cirrhosis and
  acute fulminant liver failure itself is enough to
  investigate for Hepatorenal syndrome



• All the major criteria are to be met
  for the diagnosis of HRS and minor criteria
  are just supportive and are not essential to
  make the diagnosis
MAJOR DIAGNOSTIC CRITERIA
1)Chronic/Acute liver disease with advanced hepatic failure or
   portal hypertension
2)Serum creatinine >1.5mg/dl(reflecting decreased GFR),<40
   ml/min
3)Absence of shock,bacterial infection,current or recent
   treatment with nephrotoxic drugs,absence of renal or g.i.t
   losses
4)No increase in renal function after diuretic withdrawal and
   plasma volume expansion and intravenous albumin(1g/kg bdy
   wt upto a maximum of 100g)
5)Proteinuria <500mg/dl, no USG evidence of renal
   parenchymal damage (urine analysis) , no obstructive
   uropathy.
MINOR DIAGNOSTIC CRITERIA
Urine volume <500ml/24 hr
Urine sodium <10 meq/L
Urine plasma osmolality greater than plasma osmolality
Urine blood cells<50 per HPF
Serum sodium <130 meq/L
CLASSIFICATION OF HRS
Classified based on TIME COURSE and PRECIPITATING
   FACTORS
Four types-
HRS type-1: Cirrhosis with rapidly progressive acute renal
 failure
HRS type-2:Cirrhosis with sub acute renal failure
HRS type-3:Cirrhosis with type-1 or type-2 HRS
 superimposed on chronic kidney disease/acute renal
 injury
HRS type-4:fulminant liver failure with HRS

   Clinics of North America,2006
TYPE-1 HRS

It is the cirrhosis with rapidly progressive acute renal failure
Characterized by-
Rapid elevation of BUN and creatinine:100% increase with a level
    reaching 2.5mg/dl in 2 weeks or a 50% reduction in initial 24 hr
    clearance to < 20 ml/min
Rapidly progressive
Mortality reaching 80% with 2 weeks
Commonly has precipitating factors-SBP(20%)
                        -variceal hemorrhage
                        -acute alcoholic hepatitis
                         -drug induced(acetaminophen)
                         -acute hepatic injury from viral hepatitis
Deeply jaundiced ,coagulopathy
Death by hepatic plus renal failure,variceal bleeding.
TYPE-2 HRS


Cirrhosis with sub acute renal failure
Characterized by-
Slowly increasing serum creatinine levels and slow
   reduction of GFR(Takes weeks to months)
No precipitating factor
It has poorer prognosis and eventually progresses to type -1
   due to precipitating factors
TYPE-3 HRS


Cirrhosis with type 1 or type 2 HRS superimposed on
   chronic kidney disease or acute renal injury
85% of end stage cirrhotics have intrinsic renal disease
   on renal biopsy
Diagnostic markers of HRS are absent
TYPE-4 HRS


Fulminant liver failure with HRS
More than 50% of acute fulminant liver failure develop
  HRS
Prognosis of HRS is superimposed on already poor
  prognosis of acute fulminant liver failure.
CLINICAL FEATURES
• SYMPTOMS-
  -distension of the abdomen
  -change in mental status(confusion,delirium and
 dementia)
   -coarse muscle movements or muscle jerks
   -dark coloured urine
   -yellow skin
   -↓sed urine output
   -nausea and vomiting
   -weight gain
• SIGNS
 -Confusion
 - icterus
 - ascites
 - abnormal reflexes
 - decreased testicle size
 - gynaecomastia
 - sores on the skin
DIFFERENTIAL DIAGNOSIS
• Pre renal causes--- hemorrhage ,diarrhea,hypovolemia
• Intra Renal causes --- acute tubular necrosis,interstitial
  nephritis.
• Post renal causes -- uropathy

• Diagnosis by exclusion.
• it is extreme example of prerenal failure.(Una <20 ,Fna <1,
    Ucr/Pcr >40 ,Uosm/Posm >1.5 )
LABORATORY STUDIES
• Diagnosis depends mainly on s . creatinine levels as no
  specific tests establish the diagnosis of HRS. (>1.5mg/dl)
• Though serum creatinine level is a poor marker of renal
  function in cirrhosis (low muscle mass)
  no other validated and reliable non invasive markers exist for
  monitoring renal function in these patients.
• Inulin clearance is cumbersome and is not used clinically.
• Low GFR is defined by s cr >1.5 mg/dl without diuretic
  therapy for at least 5 days.
• overestimates GFR by upto 50% .
CBP ,WBC : infection such as SBP if leucocytosis or bands are
present,a condition known to present with reversible
impairment in renal function

Serum electrolytes and renal function

Liver function test with PT (although the degree of liver failure
doesn’t correlate with the development of HRS,these are
essential for Child-Pugh scoring)

Blood cultures- for bacteremia particularly if no precipitant is
identified,is prudent( 20% SBP are culture -ve)

Cryoglobulins- in patients with hepatitis B and or C who can
develop renal failure from cryoglobulinemia.
MANAGEMENT
 GENERAL MANAGEMENT:
• Type I HRS - hospitalization, type 2 - outpatient.
• CVP for assessing fluid status.
• Stop diuretics
• Tense ascites -paracentesis
• If > 5l of fluid removed ,then albumin is good as
  volume expander.
• low salt diet,free water restriction -hyponatremia cases.
• HRS type-1 & 4 need intensive management
THERAPUETIC OPTIONS
•   Pharmacological treatment
•   Surgical
•   TIPS
•   Artificial liver support
•   RRT
•   Liver transplantation.
•   LKT
Pharmacological treatment
• Goal : reverse renal function
• Prolong survival until liver TRx.
• 1.RENAL VASODILATORS
• 2.SYSTEMIC VASOCONSTRICTORS.

• 1.RENAL VASODILATORS:
• DIRECT renal vasodilators - DOPAMINE,FENOLDOPAM,PGs
• Antagonizing endogenous effect of renal vasocontrictors-
  Sarlasin,ACEI ,endothelin antagonists.
DOPAMINE
Low dose dopamine(2-5Âľgm/kg /min) is prescribed in the hope
   that its vasodilatory properties may improve renal blood flow
MISOPROSTOL
A synthetic analogue of PG E1, use was based on the
   observation of low urinary levels of vasodilatory PGs.
The use of both the above drugs was not substanciated by any
   studies
RENAL VASOCONSTRICTOR ANTAGONIST
Sarlasin used in attempt to reverse renal vasoconstriction.
This inhibits the hemostatic response to hypotension and led to
   further worsening of renal function .
N-ACETYLCYSTEINE
Mechanism of action is unknown but studies encourage
   optimism for medical management where option for liver
   transplant is not present
• None of the studies that used renal vasodilators showed
  imrpovement in renal perfusion or GFR. -- Barnado et al
  , Benette et al .




• Because of adverse effects
  ,lack of benefit the use of
  renal vasodilators has been
  abandoned.
Systemic vasoconstrictors
• Most promising agents.
• Interruption of splanchnic vasodilation will relieve the
  intense renal vasoconstriction.
• VASOPRESSIN ANALOGUES -ORNIPRESSIN ,TERLIPRESSIN
• SOMATOSTATIN ANALOGUE -OCTREOTIDE.
• ADRENERGIC AGONISTS - MIDODRINE, NOREPINEPHRINE.
 VASOPRESSIN ANALOGUES:
• Marked vasoconstrictor effect.
• V1receptors on smooth muscle of arterial wall .
• Rx of acute variceal hemorrhage.
• Ornipressin -- ischemic adverse effects. (30% )
• Terlipressin – most common used drug now.
• Better response in type 2 HRS than in type 1 HRS.
• 17-50% recurrence rate of HRS. – reversible.
• Duration of therapy is unclear.
• 60-80% improvement in type IHRS
• To be given until s creatinine< 1.5 mg/dl ,or 15days.
• Liver disease occurs in 3 months of therapy if not TRx.
 OCTREOTIDE:
• An inhibitor of glucagon.
• Ineffective in type 2 HRS
 Alpha ADRENERGIC AGONISTS - MIDODRINE,NE
• Both are ineffective in type 2 HRS .
• Better response in type I HRS.
 DRUG              DOSE                     DURATION   SIDE EFFECTS
TERLIPRESSIN     0.5-2mg every 4 hrs as 15 days        Peripheral,cardiac,splanchnic
                 IV bolus                              ishemia
NOREPINEPHRINE   0.5-3.0 mg/hr IV          15 days     same
                 infusion
 MIDODRINE       7.5-12.5 mg every 8 hrs   ??          Not reported
                 oral
• High HRS recovery rate with
  vasopressin and improved survival
  ,more likely to recieve a liver
  transplant compared to octreotide -
  Kiser et al.



• Norepinephrine role is paradox -
  levels are elevated in pts with
  HRS.Significant improvement with
TREATMENT PROTOCOL
 OF NORADRENALINE/TERLIPRESSIN PLUS AIBUMIN FOR HRS:

• NA –Initial dose 0.146µg/kg/min iv infusion,if no increase in
  MAP by 10mm Hg, dose by 0.05Âľg/kg/min every 4thhrly up
  to dose of 0.7Âľg/kg/min
• Terlipressin- 1mg iv bolus every 4th hrly.At day 3 if baseline
  s. creatinine not reduced ≥25% , the dose up to 2mg every
  4thhrly
MIDODRINE WITH OCTREOTIDE
Midodrine(alpha adrenergic blocker) and octreotide
  (somatostatin analogue)
Rx protocol of midodrine plus octreotide therapy
Octreotide
      initial dose:100Âľgm t.i.d SC
       goal to increase upto 200Âľgm t.i.d SC
Midodrine
     Initial dose:5mg,7.5mg,10mg t.i.d orally
     goal to ↑dose upto 12.5mg to 15mg t.i.d if necessary
Because of oral and subcutaneous route of the drug
  suitable for use in outpatient deparment
CONTRAINDICATIONS OF VASOCONSRICTOR THERAPY:
•   CAD
•   Cardiomyopathies,
•   Cardiac arrythmias,
•   Cardiac/respiratory failure,
•   Arterial HTN,
•   Cerebrovascular disease,
•   Peripheral vascular disease,
•   Bronchospasm,asthma,
•   Terminal liver disease,
•   Advanced hepatocellular carcinoma,
•   Age >70yrs
TIPS
• Insertion causes reduction of portal pressure.
• Beneficial in patients with cirhhosis and refractory ascites.
• M.O.A- suppression of putative hepatorenal reflex,
  improvement in circulatory volume,ameiloration of cardiac
  function.
• Guevara et al
• Unanswered observations
• 1 . Parameters improve,but not normalize. After TIPS.
• 2.maximum renal recovery is 2-4 wks.
• 3.advanced cirrhotic patients are not benefited.
• 4.ppts underlying acute heart failure.
TRANSJUGULAR INTRAHEPATIC PORTOSYSTEMIC SHUNT(TIPS)
Is theoretically attractive therapy
It dramatically lowers portal pressure leading to ↓ pooling of
    blood in splanchnic bed
But ↑venous return is inappropriately handled
And many patients do not meet the criteria for TIPS
    insertion(i.e serum bilirubin <5mg/dl,INR <2 and Child-Pugh
    score <12)
When these conditions are not met TIPS insertion may lead to
    liver failure or intractable hepatic encephalopathy
Done only in patients with Child-Pughs A/B with criteria and
    who do not respond to vasoconstrictor therapy
Patients with refractory ascites often proceed to the
    development of HRS type -2 and TIPS in these patients may
    lead better survival(metaanalysis)
SURGICAL CARE
PERITONEOVENOUS SHUNTING
theoretically seems attractive because it leads to plasma
  volume expansion and improvement of circulatory
  function
Has no role in type-1 HRS
Important for patients type-2HRS who have refractory
  ascites and are not candidates for orthotopic liver
  transplant and do not tolerate frequent LVPs
ARTIFICIAL LIVER SUPPORT
Eliminates circulating mediators of splanchnic
   vasodilatation & renal vasoconstriction
Provides hemodynamic benefit and decreases s. creatinine
Continous venovenous hemofilteration is better.
In Acute liver failure patients treated with porcine
   hepatocyte based bioartificial liver reported renal failure
   no details provided
Currently these are being used in HRS but are not
   advocated for its treatment.
ALBUMIN DIALYSIS
•   Currently three systems are available for albumin dialysis.
•   1.MARS
•   2.PROMETHEUS
•   3.SINGLE PASS ALBUMIN DIALYSIS (SPAD)
MOLECULAR ADSORBENT RECIRCULATING
              SYSTEM (MARS)
• Designed by Stange and Mitzner from Germany in 1993.
• Cell free ,modified dialysis technique.
• Three circuits - blood,albumin,renal.
• 600 ml of 20% albumin acts as dialysate
• Removes both albumin bound,water soluble substances by
  using a combination of albumin enriched dialysate,CRRT.
• Removal of albumin bound bile acids (detrimental to
  hepatocytes) ,kidney –stabilizes liver function.
• Removes water soluble TNF A , IL6 and NO.
• Substance . 50 KDa are not removed .
                                 Artif Organs 1993 ;17:809-13
PROMETHEUS
• First described in 1999 .
• Principle of fractioned plasma seperation and adsorption.
• Albumin permeable membrane ,size of 250kDa.
• Albumin passes through the membrane and adsorbers that
  remove toxins.
• Reduction of both bilirubin,urea more > MARS.




                 Rifai K, Kretschmer U ,et al. J.Hepatol 2003 ; 39:984-90
SINGLE PASS ALBUMIN DIALYSIS(SPAD)
• Dialyses blood/plasma against a 4.4% solution of
  albumin,disposed after a sinlge pass.
• A standard renal replacement machine is used with out any
  additional perfusion pump system
• With regard to bilirubin,ammonia it is greater than MARS in
  its detoxifying capacity.
• In vivo useful in fulminant hepatic failure.
• Further experience required for routine use.




               Kreymann B, Schweigart U et al. J.Hepatol 1999;31:1080-5
RENAL REPLACEMENT THERAPY
• Controversial role in pts with type I HRS ,not undergoing
  liver TRx.
• To be individualized.
• Indications:
• 1.waiting for liver TRx
• 2.developed volume overload
• 3.intractable metabolic acidosis.
• 4.hyperkalemia.
• Bridge to liver TRx.
• CRRT > HD - removes inflammatory cytokines - TNF A,IL-6
• FUTILE IN pts on mechanical ventilator.
LIVER TRANSPLANTATION
• Best treatment for suitable patients with HRS.
• RENAL SODIUM excretion,hemodynamic abnormalities
  normalize in 1 month.
• Renal resistance index normalize in 1 year post
  transplantation.
• Allocation is by MELD score.
• Alessandra et al MELD score not beneficial for HRS pts.
• Prolonged hospitalizations required
• Renal failure persists for weeks post TRx.
• Post TRx reversal of HRS is 58%.
LIVER TRANSPLANT


Long term survival following liver transplant is good
Mortality of individuals with HRS was as high as 25% within the
   first month after transplantation(HRS patients with grater
   hepatic dysfunction MELD score >36 are at greater risk of
   early mortality)
high priority is given to type-1
But these patients are not transplanted because of the
   precipitating event which initiated HRS and are extremely ill
   with multiorgan failure and rapid course of the disease
   providing insufficient time
In patients with HRS type -2 liver transplant is more
   practical because of the absence of precipitating
   factors,longer clinical course & less severe renal failure
In type-3 HRS both liver and kidney transplant in these
   extremely ill patients is a dilemma.
   only liver transplant may be beneficial given the
   prospect of post op RRT
Patients with low MELD score and successful
   vasoconstrictor therapy have lower post op
   complications.
Further deterioration of renal function after liver
   transplantation is transient and is thought to be due to
   use of immunosuppressants that are
   nephrotoxic(tacrolimus, cyclosporin)
Renal function before
liver TRx is an independent
predictor of both short
term and long term post
transplantation patient and
graft survival…Gonwa et al
Predictors of renal recovery
•   Younger recipients
•   Nonalcoholic liver disease
•   Low posttransplantation bilirubin
•   Age of the donor
LKT
• Prolonged duration of RRT pretransplantation.
• h/o previous renal failure
• CKD on biopsy.
SPECIFIC THERAPY

TYPE OF HRS         TREATMENT
TYPE I HRS         Vasoconstrictors,albumin,TIPS,liver Trx
TYPE 2 HRS          Vasoconstrictors ,LVP,TIPS(ref),Liver
                   Trx
TYPE 3 HRS          CRRT, LKT
 TYPE 4 HRS         idealy LTx
PREVENTION
Prompt treatment of precipitating factors of type-1
  HRS like sepsis, shock, variceal hemorrhage,acute
  alcoholic hepatitis and nephrotoxic drugs according
  to standard guidelines
A trial has shown norfloxacin as prophylaxis for SBP
  decreases HRS to 28% compared to 41%
Albumin administration at diagnosis and day 3 in
  patients with SBP decreases HRS. (10%)
Pentoxyphylline 400mg tid for 28 days in alcoholic
  hepatitis decreases HRS.( 24%)
However these are not proved in recent studies
prognosis
•   Worst prognosis of all complications of cirrhosis.
•   Type 1 HRS without Rx < 2 weeks
•   All pts in 8-10 weeks after onset of RF.
•   Type 2 HRS - 6 months .




                                     Lancet 2003 ;362:1819-1827
Unanswered questions….
• 1.best modality of therapy
• 2.predictability of LKT versus a liver only transplant.
• 3.how are vasoconstrictors compare with TIPS,MARS
• 4.best to use vasoconstrictor?
• 5.whether there is an independent beneficial effect of
  albumin in HRS?
• 6.why renal recovery rate is variable between centers.
TRIALS
Fabrizi F et al – meta analysis (2007) of terlipressin therapy for
   HRS
Sanyal A,boyer T,Teuber P(2007)-Randomised double blind
   placebo controlled trail for terlipressin therapy
In both the trials showed that terlipressin is more effective than
   placebo in reversing HRS
Nakaeh,Igarashi T,Tajimi K et al-case report of hepatorenal
   syndrome treatment with plasma differentiation(2007)
Rimola A,Navasa M,Grande et al-liver transplantation for
   cirrhosis and ascitis(2005)
Take home message
• 1.HRS is a functional reversible renal
  failure in cirrhotic, fulminant liver failure
  patients.
• 2. patients with SBP ,who underwent LVP
  , had GI hemorrhage should be carefully
  followed up as they are more prone for
  HRS.
• 3 .diagnosis by exclusion ,based on major
  criteria.
• 4.type I HRS has high mortality ,HRS 2
  prolonged survival ,type3 in CKD ,type 4
  HRS - fulminant hepatic failure.
• 7.MARS is an upcoming procedure.
• 8.Liver TRx is treatment of choice .
• 9.MELD score does not work out for
  HRS patients
• 10.recovery depends on age,s
  bilirubin,non alcoholic liver disease.
• 11.role of LKT in patients with HRS to
  be checked out.
• 12.albumin infusion in patients with SBP
REFERENCES
• MEDICINE UPDATE ,vol 17 , 2007
• HEPATORENAL syndrome :pathophysiology and management
  :Amercian Society Of Nephrology ,2006
• Emedicine .com
• Clinics of North America ,2006,2007 – care of cirrhotic patients
  ,hepatic emergencies in cirrhosis.
• Mayoclinic.com
• HARRISON’S PRINCIPLES OF INTERNAL MEDICINE ,18th ed
• World journal of gastroenterology ,2007:4046-4055,
Hepatorenal syndrome
Hepatorenal syndrome

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Hepatorenal syndrome

  • 1.
  • 2. INTRODUCTION • Hepato Renal Syndrome (HRS) is a functional and reversible form of renal failure , in patients with advanced chronic liver disease. • Interactions between systemic and portal hemodynamics causes intense renal vasoconstriction . • May develop spontaneously without known precipitating factors but there are known triggers. • To be diagnosed based on criteria. • Worst prognosis of all the complications of cirrhosis. • Terlipressin is the drug of choice in treatment. • Liver transplantation is the definitive cure for patients. • Recently liver dialysis by means of albumin bound membranes is providing a means of extracorporeal liver support.
  • 3. History • Frerichs ,Flint - first report of renal failure in the absence of significant renal histologic changes,in chronic liver diseases. • Hecker, Sherlock (1956) – Pathogenesis of hepatorenal syndrome. • Epstein et al - splanchnic ,systemic vasodilation together with intense renal vasoconstriction is the pathophyisological hallmark of HRS. • 1970 s -TERMINAL FUNCTIONAL RENAL FAILURE • 2007 -Molecular Adsorbent Recirculating System.
  • 4. Alternative names • Heyd's syndrome • Flint's syndrome • Frerichs' syndrome • Bile nephrosis, • Cholemic nephrosis, • Hepatonephrite, • Hepatonephritis serosa acuta, • Leber-Nieren-Syndrom (German), • Nephrite fonctionelle (French).
  • 5. Case • A 35-year-old male,k/c/o alcoholic cirrhosis, ascites and a history of alcoholic hepatitis presented to casualty for management of his cirrhosis and was diagnosed with new- onset renal insufficiency upon admission. • no history of renal dysfunction ,diabetes mellitus. He had blood transfusions at another hospital 5 days previously after having suffered a gastrointestinal hemorrhage. • No h/o SBP or recent treatment with nephrotoxic drugs. Upon admission, he was taking pentoxifylline 400 mg three times daily (tid) for alcoholic hepatitis, and furosemide 80 mg daily (qd) and spironolactone 200 mg qd for his cirrhosis with ascites.
  • 6. • Physical examination revealed jaundice, ascites, and spider angiomas on his chest. Viral hepatitis serologies were negative, but ultrasound revealed a nodular liver and splenomegaly. No evidence of chronic renal parenchymal disease or obstructive uropathy. Ascitic fluid analysis demonstrated a SAAG of >1.1g/dl. • Diuretics were discontinued, and intravascular volume replacement was provided by administration of both 1.5 l of isotonic saline and a total of 120 g of human albumin administered over several doses but the patients renal function continued to worsen. • A DIAGNOSIS OF HEPATORENAL SYNDROME WAS MADE.
  • 7. CAUSES OF RENAL FAILURE IN CIRRHOSIS H • Large volume paracentesis Y • Shock P O • Sepsis T • Nephrotoxic Medications E Renal failure • Intrinsic renal diseases N • Volume depletion secondary S to diuresis. I O N
  • 8. Diagnostic Approach to Renal Failure in Cirrhotics Renal failure in a pt with cirrhosis hold diuretics,offending medications YES Trial of ntravascularvolumeexpander ECF fluid losses;rapid/excessive diuretics (albumin)if renal function ↑ses , h Vomiting,diarrhoea,hemorrhage,recent, Diagnosis of prerenal failure is LVP /hemodynamic changes due to use of made NSAIDS (or)ACEI YES NO Toxic or ischemic renal failure Recent use of nephrotoxicmedications Hypotension(sepsis,hemorrhage) YES Suspected glomerular disease NO Depending upon clinical scenario Glomerular proteinuria&hematuria Further workup may include i.e.,dysmorphic RBCs and RBC cast Cryoglobulins C3,C4 and renal NO YES biopsy Imaging (USG,CT scan)shows Suggestive of obstructive uropathy Hydronephrosis,urinary retention Unless long standiing relief of obstruction NO Should lead to improvement in YES renalfunction Patient has evidence of Portal Diagnosis of HRS can be Hypertension & serum made creatinine>1.5mg/dl
  • 9. IAC verbatim • “Hepatorenal syndrome is a syndrome that occurs in patients with chronic liver disease, portal hypertension and advanced hepatic failure .It is characterised by impaired renal function, marked abnormalities in arterial circulation and activity of endogenous vasoactive systems . In the kidney ,there is marked renal vasoconstriction that results in low GFR. In the extrarenal circulation there is predominance of arteriolar vasodilation , that results in reduction of total systemic vascular resistance and arterial hypotension.A similar syndrome may also occur in the setting of acute live failure”. -IAC ,Chicago 1996
  • 10. DEFINITION • First systemic attempt to define HRS was made by International Ascites Club(1994) • HEPATORENAL SYNDROME is a distinct form of fucntional acute/sub acute renal failure charecterised by severe renal vasoconstriction which develops in decompensated Cirrhosis or Acute liver failure,in the absence of uderlying renal pathology. (Clinics of North America;Expert consensus;1996) • Recently updated to include Albumin as volume expander.
  • 11. EPIDEMIOLOGY • Incidence of HRS in patients with chronic liver disease is not well studied. • 4% of patients admitted with decompensated cirrhosis. • In a study of 234 non azotemic patients with liver disease who had ascites and cirrhosis,18% developed HRS at 1year and 39% developed by 5 years. • Retrospective studies indicate HRS is present in 17% of pts admitted to hospital with ascites,and in > 50% of cirrhotics dying from liver failure • Some patients without ascites devolped the condition in the setting of acute fulminant hepatic failure.
  • 12. Pathophysiology • Four interrelated pathways have been implicated in the pathophysiology .. • “Possible impact of each one of these pathways on renal vasoconstrcition and development of HRS varies from one patient to other .” • 1.PERIPHERAL ARTERIAL VASODILATION • 2.STIMULATION OF RENAL SNS • 3.CARDIAC DYSFUNCTION • 4.CYTOKINES ,VASOACTIVE MEDIATORS.
  • 13. Cont.. • 1.PERIPHERAL ARTERIAL VASODILATION : • Rational and simple explanation to the hemodynamic changes that takes place in cirrhosis ,HRS. • Degree of hepatic decompensation degree of hyperdynamic circulation , • Degree of hepatic decompensation 1/ arterial BP. • Reversal of HRS ,improvement of hemodynamics by systemic vasoconstriction gives support to this hypothesis.
  • 14. Pathophysiology of HRS CIRRHOSIS splanchnic arterial vasodilation arterial underfilling stimulation of systemic vasoconstrictors renal vasoconstriction late stage of cirrhosis early stages of cirrhosis local vasodilators , local vasoconstrictors systemic and local vasodilators HEPATORENAL SYNDROME PRESERVED RENAL PERFUSION
  • 15. Correlation between clinical features and pathophysiology in HRS HRS diuretic refractory ascites ascites Clinical Physiological Portal HTN Splanchnic vasodilation renal vasoconstriction
  • 16. • 2.stimulation of renal SNS : • sympathetic tone in pts with cirrhosis. • KOSTREVA et al vena caval ligation -- increased intrahepatic pressure -- renal sympathomimetic activity --wears after anterior hepatic nerves are cut. • Severing renal ,hepatic,spinal nerves abolishes the response of decreased GFR ,RPF seen after hepatocyte swelling.
  • 17. • 3.cardiac dysfunction : • Myocardial contractility impaired.( cirrhosis ) • Diastolic dysfunction cirrhosis progression • Hyperdynamic state being present • Cause is diseased liver ,reversible after TRx • BNP , CVP child pugh score ,ventricular wall thickness. • Neurohormonal activity - growth ,fibrosis – disturbed relaxation . • Inhibitory effect of TNF ,NO on ventricular function.
  • 18. Cardiac dysfunction is masked by decreased afterload in cirrhotic patients . Decreased cardiac output
  • 19. • 4.cytokines ,vasoactive mediators: • Not a sole player. • NO,TNF ,endothelin , endotoxin,glucagon,increased PG s . • Upregulation of e NOS activity,endotoxin ,inducible. • Reduces pressor effect of vasoconstrictors. • More in cirrhotics ,ascites. • Renal vasoconstriction due to dimethylarginine - a natural NO inhibitor. • Reduced cyclooxygenase activity in renal medullary tissue.
  • 20.
  • 21. Precipitating factors • In type I HRS ppting event identified in 70-100 % pts. • More than one event in a patient. • Bacterial infections • Large volume paracentesis without albumin infusion. (15%) • GI bleeding • Acute alcoholic hepatitis. (25%) • SBP - 20-30% develop HRS.
  • 22. How ppt factor leads to renal failure? • A.cytokine-induced aggravation of the circulatory dysfunction with further stimulation of the RAAS and SNS and worsening renal vasoconstriction. • intrarenal vicious cycle that favors more renal vasoconstrictor release and impairs renal vasodilator synthesis . • will progress to HRS even if the underlying precipitating event has been corrected. • B.secondary to deterioration in cardiac function as a result of either the development of septic cardiomyopathy or worsening of a latent cirrhotic cardiomyopathy
  • 23. DIAGNOSIS OF HRS • Diagnosis of HRS is made on certain predefined criteria in the appropriate clinical setting • Increasing s.creatinine in patients with cirrhosis and acute fulminant liver failure itself is enough to investigate for Hepatorenal syndrome • All the major criteria are to be met for the diagnosis of HRS and minor criteria are just supportive and are not essential to make the diagnosis
  • 24. MAJOR DIAGNOSTIC CRITERIA 1)Chronic/Acute liver disease with advanced hepatic failure or portal hypertension 2)Serum creatinine >1.5mg/dl(reflecting decreased GFR),<40 ml/min 3)Absence of shock,bacterial infection,current or recent treatment with nephrotoxic drugs,absence of renal or g.i.t losses 4)No increase in renal function after diuretic withdrawal and plasma volume expansion and intravenous albumin(1g/kg bdy wt upto a maximum of 100g) 5)Proteinuria <500mg/dl, no USG evidence of renal parenchymal damage (urine analysis) , no obstructive uropathy.
  • 25. MINOR DIAGNOSTIC CRITERIA Urine volume <500ml/24 hr Urine sodium <10 meq/L Urine plasma osmolality greater than plasma osmolality Urine blood cells<50 per HPF Serum sodium <130 meq/L
  • 26.
  • 27. CLASSIFICATION OF HRS Classified based on TIME COURSE and PRECIPITATING FACTORS Four types- HRS type-1: Cirrhosis with rapidly progressive acute renal failure HRS type-2:Cirrhosis with sub acute renal failure HRS type-3:Cirrhosis with type-1 or type-2 HRS superimposed on chronic kidney disease/acute renal injury HRS type-4:fulminant liver failure with HRS Clinics of North America,2006
  • 28. TYPE-1 HRS It is the cirrhosis with rapidly progressive acute renal failure Characterized by- Rapid elevation of BUN and creatinine:100% increase with a level reaching 2.5mg/dl in 2 weeks or a 50% reduction in initial 24 hr clearance to < 20 ml/min Rapidly progressive Mortality reaching 80% with 2 weeks Commonly has precipitating factors-SBP(20%) -variceal hemorrhage -acute alcoholic hepatitis -drug induced(acetaminophen) -acute hepatic injury from viral hepatitis Deeply jaundiced ,coagulopathy Death by hepatic plus renal failure,variceal bleeding.
  • 29. TYPE-2 HRS Cirrhosis with sub acute renal failure Characterized by- Slowly increasing serum creatinine levels and slow reduction of GFR(Takes weeks to months) No precipitating factor It has poorer prognosis and eventually progresses to type -1 due to precipitating factors
  • 30. TYPE-3 HRS Cirrhosis with type 1 or type 2 HRS superimposed on chronic kidney disease or acute renal injury 85% of end stage cirrhotics have intrinsic renal disease on renal biopsy Diagnostic markers of HRS are absent
  • 31. TYPE-4 HRS Fulminant liver failure with HRS More than 50% of acute fulminant liver failure develop HRS Prognosis of HRS is superimposed on already poor prognosis of acute fulminant liver failure.
  • 32. CLINICAL FEATURES • SYMPTOMS- -distension of the abdomen -change in mental status(confusion,delirium and dementia) -coarse muscle movements or muscle jerks -dark coloured urine -yellow skin -↓sed urine output -nausea and vomiting -weight gain
  • 33. • SIGNS -Confusion - icterus - ascites - abnormal reflexes - decreased testicle size - gynaecomastia - sores on the skin
  • 34. DIFFERENTIAL DIAGNOSIS • Pre renal causes--- hemorrhage ,diarrhea,hypovolemia • Intra Renal causes --- acute tubular necrosis,interstitial nephritis. • Post renal causes -- uropathy • Diagnosis by exclusion. • it is extreme example of prerenal failure.(Una <20 ,Fna <1, Ucr/Pcr >40 ,Uosm/Posm >1.5 )
  • 35. LABORATORY STUDIES • Diagnosis depends mainly on s . creatinine levels as no specific tests establish the diagnosis of HRS. (>1.5mg/dl) • Though serum creatinine level is a poor marker of renal function in cirrhosis (low muscle mass) no other validated and reliable non invasive markers exist for monitoring renal function in these patients. • Inulin clearance is cumbersome and is not used clinically. • Low GFR is defined by s cr >1.5 mg/dl without diuretic therapy for at least 5 days. • overestimates GFR by upto 50% .
  • 36. CBP ,WBC : infection such as SBP if leucocytosis or bands are present,a condition known to present with reversible impairment in renal function Serum electrolytes and renal function Liver function test with PT (although the degree of liver failure doesn’t correlate with the development of HRS,these are essential for Child-Pugh scoring) Blood cultures- for bacteremia particularly if no precipitant is identified,is prudent( 20% SBP are culture -ve) Cryoglobulins- in patients with hepatitis B and or C who can develop renal failure from cryoglobulinemia.
  • 37. MANAGEMENT  GENERAL MANAGEMENT: • Type I HRS - hospitalization, type 2 - outpatient. • CVP for assessing fluid status. • Stop diuretics • Tense ascites -paracentesis • If > 5l of fluid removed ,then albumin is good as volume expander. • low salt diet,free water restriction -hyponatremia cases. • HRS type-1 & 4 need intensive management
  • 38. THERAPUETIC OPTIONS • Pharmacological treatment • Surgical • TIPS • Artificial liver support • RRT • Liver transplantation. • LKT
  • 39. Pharmacological treatment • Goal : reverse renal function • Prolong survival until liver TRx. • 1.RENAL VASODILATORS • 2.SYSTEMIC VASOCONSTRICTORS. • 1.RENAL VASODILATORS: • DIRECT renal vasodilators - DOPAMINE,FENOLDOPAM,PGs • Antagonizing endogenous effect of renal vasocontrictors- Sarlasin,ACEI ,endothelin antagonists.
  • 40. DOPAMINE Low dose dopamine(2-5Âľgm/kg /min) is prescribed in the hope that its vasodilatory properties may improve renal blood flow MISOPROSTOL A synthetic analogue of PG E1, use was based on the observation of low urinary levels of vasodilatory PGs. The use of both the above drugs was not substanciated by any studies RENAL VASOCONSTRICTOR ANTAGONIST Sarlasin used in attempt to reverse renal vasoconstriction. This inhibits the hemostatic response to hypotension and led to further worsening of renal function . N-ACETYLCYSTEINE Mechanism of action is unknown but studies encourage optimism for medical management where option for liver transplant is not present
  • 41. • None of the studies that used renal vasodilators showed imrpovement in renal perfusion or GFR. -- Barnado et al , Benette et al . • Because of adverse effects ,lack of benefit the use of renal vasodilators has been abandoned.
  • 42. Systemic vasoconstrictors • Most promising agents. • Interruption of splanchnic vasodilation will relieve the intense renal vasoconstriction. • VASOPRESSIN ANALOGUES -ORNIPRESSIN ,TERLIPRESSIN • SOMATOSTATIN ANALOGUE -OCTREOTIDE. • ADRENERGIC AGONISTS - MIDODRINE, NOREPINEPHRINE.
  • 43.  VASOPRESSIN ANALOGUES: • Marked vasoconstrictor effect. • V1receptors on smooth muscle of arterial wall . • Rx of acute variceal hemorrhage. • Ornipressin -- ischemic adverse effects. (30% ) • Terlipressin – most common used drug now. • Better response in type 2 HRS than in type 1 HRS. • 17-50% recurrence rate of HRS. – reversible. • Duration of therapy is unclear. • 60-80% improvement in type IHRS • To be given until s creatinine< 1.5 mg/dl ,or 15days. • Liver disease occurs in 3 months of therapy if not TRx.
  • 44.  OCTREOTIDE: • An inhibitor of glucagon. • Ineffective in type 2 HRS  Alpha ADRENERGIC AGONISTS - MIDODRINE,NE • Both are ineffective in type 2 HRS . • Better response in type I HRS. DRUG DOSE DURATION SIDE EFFECTS TERLIPRESSIN 0.5-2mg every 4 hrs as 15 days Peripheral,cardiac,splanchnic IV bolus ishemia NOREPINEPHRINE 0.5-3.0 mg/hr IV 15 days same infusion MIDODRINE 7.5-12.5 mg every 8 hrs ?? Not reported oral
  • 45. • High HRS recovery rate with vasopressin and improved survival ,more likely to recieve a liver transplant compared to octreotide - Kiser et al. • Norepinephrine role is paradox - levels are elevated in pts with HRS.Significant improvement with
  • 46. TREATMENT PROTOCOL OF NORADRENALINE/TERLIPRESSIN PLUS AIBUMIN FOR HRS: • NA –Initial dose 0.146Âľg/kg/min iv infusion,if no increase in MAP by 10mm Hg, dose by 0.05Âľg/kg/min every 4thhrly up to dose of 0.7Âľg/kg/min • Terlipressin- 1mg iv bolus every 4th hrly.At day 3 if baseline s. creatinine not reduced ≥25% , the dose up to 2mg every 4thhrly
  • 47. MIDODRINE WITH OCTREOTIDE Midodrine(alpha adrenergic blocker) and octreotide (somatostatin analogue) Rx protocol of midodrine plus octreotide therapy Octreotide initial dose:100Âľgm t.i.d SC goal to increase upto 200Âľgm t.i.d SC Midodrine Initial dose:5mg,7.5mg,10mg t.i.d orally goal to ↑dose upto 12.5mg to 15mg t.i.d if necessary Because of oral and subcutaneous route of the drug suitable for use in outpatient deparment
  • 48. CONTRAINDICATIONS OF VASOCONSRICTOR THERAPY: • CAD • Cardiomyopathies, • Cardiac arrythmias, • Cardiac/respiratory failure, • Arterial HTN, • Cerebrovascular disease, • Peripheral vascular disease, • Bronchospasm,asthma, • Terminal liver disease, • Advanced hepatocellular carcinoma, • Age >70yrs
  • 49. TIPS • Insertion causes reduction of portal pressure. • Beneficial in patients with cirhhosis and refractory ascites. • M.O.A- suppression of putative hepatorenal reflex, improvement in circulatory volume,ameiloration of cardiac function. • Guevara et al • Unanswered observations • 1 . Parameters improve,but not normalize. After TIPS. • 2.maximum renal recovery is 2-4 wks. • 3.advanced cirrhotic patients are not benefited. • 4.ppts underlying acute heart failure.
  • 50. TRANSJUGULAR INTRAHEPATIC PORTOSYSTEMIC SHUNT(TIPS) Is theoretically attractive therapy It dramatically lowers portal pressure leading to ↓ pooling of blood in splanchnic bed But ↑venous return is inappropriately handled And many patients do not meet the criteria for TIPS insertion(i.e serum bilirubin <5mg/dl,INR <2 and Child-Pugh score <12) When these conditions are not met TIPS insertion may lead to liver failure or intractable hepatic encephalopathy Done only in patients with Child-Pughs A/B with criteria and who do not respond to vasoconstrictor therapy Patients with refractory ascites often proceed to the development of HRS type -2 and TIPS in these patients may lead better survival(metaanalysis)
  • 51. SURGICAL CARE PERITONEOVENOUS SHUNTING theoretically seems attractive because it leads to plasma volume expansion and improvement of circulatory function Has no role in type-1 HRS Important for patients type-2HRS who have refractory ascites and are not candidates for orthotopic liver transplant and do not tolerate frequent LVPs
  • 52. ARTIFICIAL LIVER SUPPORT Eliminates circulating mediators of splanchnic vasodilatation & renal vasoconstriction Provides hemodynamic benefit and decreases s. creatinine Continous venovenous hemofilteration is better. In Acute liver failure patients treated with porcine hepatocyte based bioartificial liver reported renal failure no details provided Currently these are being used in HRS but are not advocated for its treatment.
  • 53. ALBUMIN DIALYSIS • Currently three systems are available for albumin dialysis. • 1.MARS • 2.PROMETHEUS • 3.SINGLE PASS ALBUMIN DIALYSIS (SPAD)
  • 54. MOLECULAR ADSORBENT RECIRCULATING SYSTEM (MARS) • Designed by Stange and Mitzner from Germany in 1993. • Cell free ,modified dialysis technique. • Three circuits - blood,albumin,renal. • 600 ml of 20% albumin acts as dialysate • Removes both albumin bound,water soluble substances by using a combination of albumin enriched dialysate,CRRT. • Removal of albumin bound bile acids (detrimental to hepatocytes) ,kidney –stabilizes liver function. • Removes water soluble TNF A , IL6 and NO. • Substance . 50 KDa are not removed . Artif Organs 1993 ;17:809-13
  • 55.
  • 56. PROMETHEUS • First described in 1999 . • Principle of fractioned plasma seperation and adsorption. • Albumin permeable membrane ,size of 250kDa. • Albumin passes through the membrane and adsorbers that remove toxins. • Reduction of both bilirubin,urea more > MARS. Rifai K, Kretschmer U ,et al. J.Hepatol 2003 ; 39:984-90
  • 57. SINGLE PASS ALBUMIN DIALYSIS(SPAD) • Dialyses blood/plasma against a 4.4% solution of albumin,disposed after a sinlge pass. • A standard renal replacement machine is used with out any additional perfusion pump system • With regard to bilirubin,ammonia it is greater than MARS in its detoxifying capacity. • In vivo useful in fulminant hepatic failure. • Further experience required for routine use. Kreymann B, Schweigart U et al. J.Hepatol 1999;31:1080-5
  • 58. RENAL REPLACEMENT THERAPY • Controversial role in pts with type I HRS ,not undergoing liver TRx. • To be individualized. • Indications: • 1.waiting for liver TRx • 2.developed volume overload • 3.intractable metabolic acidosis. • 4.hyperkalemia. • Bridge to liver TRx. • CRRT > HD - removes inflammatory cytokines - TNF A,IL-6 • FUTILE IN pts on mechanical ventilator.
  • 59. LIVER TRANSPLANTATION • Best treatment for suitable patients with HRS. • RENAL SODIUM excretion,hemodynamic abnormalities normalize in 1 month. • Renal resistance index normalize in 1 year post transplantation. • Allocation is by MELD score. • Alessandra et al MELD score not beneficial for HRS pts. • Prolonged hospitalizations required • Renal failure persists for weeks post TRx. • Post TRx reversal of HRS is 58%.
  • 60. LIVER TRANSPLANT Long term survival following liver transplant is good Mortality of individuals with HRS was as high as 25% within the first month after transplantation(HRS patients with grater hepatic dysfunction MELD score >36 are at greater risk of early mortality) high priority is given to type-1 But these patients are not transplanted because of the precipitating event which initiated HRS and are extremely ill with multiorgan failure and rapid course of the disease providing insufficient time
  • 61. In patients with HRS type -2 liver transplant is more practical because of the absence of precipitating factors,longer clinical course & less severe renal failure In type-3 HRS both liver and kidney transplant in these extremely ill patients is a dilemma. only liver transplant may be beneficial given the prospect of post op RRT Patients with low MELD score and successful vasoconstrictor therapy have lower post op complications. Further deterioration of renal function after liver transplantation is transient and is thought to be due to use of immunosuppressants that are nephrotoxic(tacrolimus, cyclosporin)
  • 62. Renal function before liver TRx is an independent predictor of both short term and long term post transplantation patient and graft survival…Gonwa et al
  • 63. Predictors of renal recovery • Younger recipients • Nonalcoholic liver disease • Low posttransplantation bilirubin • Age of the donor
  • 64. LKT • Prolonged duration of RRT pretransplantation. • h/o previous renal failure • CKD on biopsy.
  • 65.
  • 66. SPECIFIC THERAPY TYPE OF HRS TREATMENT TYPE I HRS Vasoconstrictors,albumin,TIPS,liver Trx TYPE 2 HRS Vasoconstrictors ,LVP,TIPS(ref),Liver Trx TYPE 3 HRS CRRT, LKT TYPE 4 HRS idealy LTx
  • 67. PREVENTION Prompt treatment of precipitating factors of type-1 HRS like sepsis, shock, variceal hemorrhage,acute alcoholic hepatitis and nephrotoxic drugs according to standard guidelines A trial has shown norfloxacin as prophylaxis for SBP decreases HRS to 28% compared to 41% Albumin administration at diagnosis and day 3 in patients with SBP decreases HRS. (10%) Pentoxyphylline 400mg tid for 28 days in alcoholic hepatitis decreases HRS.( 24%) However these are not proved in recent studies
  • 68. prognosis • Worst prognosis of all complications of cirrhosis. • Type 1 HRS without Rx < 2 weeks • All pts in 8-10 weeks after onset of RF. • Type 2 HRS - 6 months . Lancet 2003 ;362:1819-1827
  • 69. Unanswered questions…. • 1.best modality of therapy • 2.predictability of LKT versus a liver only transplant. • 3.how are vasoconstrictors compare with TIPS,MARS • 4.best to use vasoconstrictor? • 5.whether there is an independent beneficial effect of albumin in HRS? • 6.why renal recovery rate is variable between centers.
  • 70. TRIALS Fabrizi F et al – meta analysis (2007) of terlipressin therapy for HRS Sanyal A,boyer T,Teuber P(2007)-Randomised double blind placebo controlled trail for terlipressin therapy In both the trials showed that terlipressin is more effective than placebo in reversing HRS Nakaeh,Igarashi T,Tajimi K et al-case report of hepatorenal syndrome treatment with plasma differentiation(2007) Rimola A,Navasa M,Grande et al-liver transplantation for cirrhosis and ascitis(2005)
  • 71. Take home message • 1.HRS is a functional reversible renal failure in cirrhotic, fulminant liver failure patients. • 2. patients with SBP ,who underwent LVP , had GI hemorrhage should be carefully followed up as they are more prone for HRS. • 3 .diagnosis by exclusion ,based on major criteria. • 4.type I HRS has high mortality ,HRS 2 prolonged survival ,type3 in CKD ,type 4 HRS - fulminant hepatic failure.
  • 72. • 7.MARS is an upcoming procedure. • 8.Liver TRx is treatment of choice . • 9.MELD score does not work out for HRS patients • 10.recovery depends on age,s bilirubin,non alcoholic liver disease. • 11.role of LKT in patients with HRS to be checked out. • 12.albumin infusion in patients with SBP
  • 73. REFERENCES • MEDICINE UPDATE ,vol 17 , 2007 • HEPATORENAL syndrome :pathophysiology and management :Amercian Society Of Nephrology ,2006 • Emedicine .com • Clinics of North America ,2006,2007 – care of cirrhotic patients ,hepatic emergencies in cirrhosis. • Mayoclinic.com • HARRISON’S PRINCIPLES OF INTERNAL MEDICINE ,18th ed • World journal of gastroenterology ,2007:4046-4055,

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