Title: Liver Cirrhosis
1Liver Cirrhosis
2Background
- Cirrhosis ?the end stage of any chronic liver
disease. - Hepatitis C and alcohol are the main causes
- Two major syndromes result
- Portal hypertension
- Hepatic insufficiency.
- peripheral and splanchnic vasodilatation with the
resulting hyperdynamic circulatory state
3Background
- Cirrhosis can remain compensated for many years
before the development of a decompensating event. - Decompensated cirrhosis is marked by the
development of any of the following
complications - Jaundice,
- Hemorrhage
- Ascites
- Encephalopathy.
- Other than liver transplantation, there is no
specific therapy for this complication.
4Background
- Other complications occur as a consequence of
PHTN and the hyperdynamic circulation. - Gastroesophageal varices result from PHTN,
although hyperdynamic circulation contributes - Ascites results from sinusoidal HTN and sodium
retention, which is 2ndry to vasodilatation and
activation of neurohumoral systems.
5Background
- The hepatorenal syndrome results from severe
peripheral vasodilatation that leads to renal
vasoconstriction. - Hepatic encephalopathy is a consequence of
shunting of blood through portosystemic
collaterals (due to PHTN), brain edema (cerebral
vasodilatation), and hepatic insufficiency.
6Definition
- A chronic disease of the liver with wide spread
hepatic parenchymal injury and hepatocyte
destruction. - It may lead to anatomic and functional
abnormalities of blood vessels and bile ducts
7Causes
- Alcohol
- Viral illness
- Biliary dysfunction
- Metabolic disorders
- Inherited disorders
- Drugs
- The most common causes are alcoholism and viral
hepatitis
8Clinical Features
- Insidious development
- Often produces no clinical manifestations
- Common symptoms
- Anorexia, nausea, abdominal discomfort, weakness,
weight loss, and malaise
9Clinical Features
- Physical examination
- Enlargement of the liver and spleen due to PHTN
- ascities,
- peripheral edema,
- Jaundice
- Spider angiomas
- GI bleeding
- Palmer erythema
- Right upper quadrant pain
10Portal Hypertension
- Portal vein collects blood from GI tract,
pancreas and spleen to the liver - Contains oxygen, nutrients and bacterial waste
- A pathway for detoxification and metabolism of
absorbed substance. - Fibrosis and nodular regeneration of liver with
distortion of hepatic veins is the main cause of
? intrahepatic resistance
11Portal Hypertension
- Persistent PHTN lead to
- Changes in blood and lymphatic flow ?
hyperfiltration and ascites - ? collateral circulation ? the risk for
esophageal and gastric varices - Hepatic encephalopathy and hepatorenal syndrome
12Lab Findings
- Bilirubingt 2mg/dl to 40 mg/dl
- AST, ALT, alkaline phosphatase
- Aid in early diagnosis, prognosis, and response
to treatment - ? ALkPo gt 3 times normal indicate billiray disease
13Lab Findings
- Albumin
- (non-specific protein) Factor V and VII
(specific proteins) can provide information on
the functional capacity of the liver - Low albumin lt 3 that does not respond to therapy
is bad prognosis
14Lab Findings
- PT
- Prolongation due to impaired synthesis of vitamin
K dependant clotting factors - No response to VIT K is poor prognosis
- BUN
- lt 5 due to inadequate protein intake and
depressed hepatic capacity for urea synthesis - Biopsy
- Confirm the presence of cirrhosis
15General Management
- Largely symptomatic
- Maintain fluid and electrolyte balance
16General Management
- Analgesics
- NSAIDs may worsen gastritis and GI bleeding
- Acetaminophen may lead to hepatoxicity
- Narcotics may lead to CNS and respiratory
depression - Sedatives and hypnotics should be avoided if the
patient is in danger of hepatic coma
17General Management
- Diet
- 2000-3000 calorie diet with 1g protein/kg
- In encepalopathy, dietary supplentation of BCAAs
- Thiamine replacement 50-100mg/da
- Iron and folate if patient is anemic
- Vitamin K 10 mg sc if PT is elevated, if PT is
not improved in 3-5 days D/C
18I-Ascities
- Definition
- Accumulation of protein rich fluid in the
peritoneal cavity. - The most common clinical feature
- Clinical features
- Inability to fit into one's clothes
- Abdominal and back pain
- Gateroesophageal reflux
- SOB secondary to impaired diaphragm movement Or
pleural effusions
19Ascities
- Pathophysiology Underfill theory
- 1-? hydrostatic pressure in portal vein and ?
oncotic pressure. - Exudation of fluid from the splanic capillary bed
and liver surface when drainage capacity of the
lymphatic system is exceeded.
20Ascities
- Pathophysiology Underfill theory
- 2-Portal hypertension ? oncotic pressure ??
arterial blood flow to vital organs ?
vasoconstriction. - Reduced circulation to kidney activate rennin
angiotension sys ? ? aldosterone Na/ water
retention. - Renal K excretion gt Na excretion urinary Na K
ratio abnormal.
21Ascities
- Goals of therapy
- Mobilize fluid
- Diminish abdominal discomfort, back pain, and
difficulty in ambulation - Prevent complications such as bacterial
peritonitis, hernias, pleural effusion,
hepatorenal syndrome, respiratory distress. - Prevent complications of treatment such as
acid-base imbalance, hypokalemia, and volume
depletion
22Ascities -Treatment
- A- Sodium Restriction (500mg-2g/day)
- 10-20 mEq/day plus bed rest (to ?rennin)
- Degree of success depends on
- Duration of restriction
- Extent of hepatic injury
- Patient with urine Na gt10 mEq/l likely respond
23Ascities -Treatment
- B-Water Restriction
- Effective in dilutional hyponatremia (Nalt130)
- Patients with low urine sodium lt10 mEq/l
- Normal renal function
- Not effective in
- reduced 24-hour Na urinary excretion
- Reduced GFR free water clearance
- May lead ? renal blood flow and azotemia
24Ascities -Treatment
- C. Diuresis
- The cornerstone of treatment
- Must be slow
- If urinary losses gt reabsorption from ascites?
volume depletion , hypotension and renal
insufficiency - Should be limited to 0.2-0.3 kg /day in patients
without edema - 0.5-1kg /day for patients with edema
25Ascities -Treatment
- I- Spironolactone
- An aldosterone-inhibiting agent
- Patients have high levels of aldosterone
- Increased production
- Portal hypertension, ascities, ? intravascular
volume, ? renal blood flow activate rennin-ang
system - Decreased excretion
- Hepatic impairment prolongs half-life due to ?
metabolism - ? albumin ? unbound hormone in the blood
- Dose 100-200 mg/day, may be ? slowly every 2-4
days
26Ascities -Treatment
- I- Spironolactone
- Monitoring Parameters
- weight
- urine output
- changes in abdominal girth
- BUN
- Increase in K/Na ratio from pretreatment baseline
- Table
27Complication of Spironolactone
- 1-Hypokalemic hyperchloremic metabolic alkalosis
and hyponatermia - May occur in untreated cirrhosis
- Initial deficiency of K due to diarrhea,
vomiting, hyperaldosterone - May be corrected with KCl supplement
- Hyponatermia corrected by temporary withdrawal of
diuretic and free water restriction - 2- Prerenal azotemia
- ARF due to overdiuresis with compromise in
intravascular volume and decreased renal
perfusion - gradual rise in Scr and Bun
- If large fluid volume must be removed quickly,
paracentesis should be preformed - 3- Gynecomastia
- can be related to cirrhosis independent of drug
use
28Ascities -Treatment
- II-Other Diuretics
- If spironolactone fails to produce diuresis or
hyperkalmeia occurs additional diuretic are
needed - The dose should be started low 50 mg/day HCTZ or
20-40 mg furosemide and gradually increased - Loop and thiazide diuretics may affect the value
of monitoring urinary electrolyte - The may cause excessive sodium loss in the
presence of continued hyperaldosteronism
29Ascities -Treatment D- Paracentesis
- Removal of large amount of ascetic fluid with a
needle or catheter - Uses
- Ascites unresponsive to diuretic therapy
- If respiratory and cardiac functions are
compromised - Not definitive because fluid quickly
reaccumliated due to transudation of fluid from
the interstitial and plasma
30D- Paracentesis
- Major complications
- 15-100 of the fluid reaccumlates with 24-48 hrs
? transient hypovolemia and possibility of shock,
encaphalopathy and ARF - Hypotension
- Hemconcentration
31D- Paracentesis
- Major complications
- Shock
- Oliguria
- Hepatorenal syndrome
- Hemorrhage
- Perforation of abdominal vicra
- Infection, bacterial peritonitis
- Protein depletion
32E- Albumin
- Combined with paracentesis
- Effective as the initial management in tense
ascites - Typical regimen
- Removal of 4-6 l/day with replacement of 40-50g
of albumin
33E- Albumin
- Benefits of combination
- More ascetic fluid can be removed
- Shorter hospital stay
- Superior to diuretic therapy
- No worsening of hepatic, renal or CV function
- Albumin alone can promote diuresis in ascites
edema by increasing intravascualr volume - The effects are not long lasting
- Variceal hemorrhage may be precipitated
34F- Dextran 70
- Can be combined with paracentesis
- Equally effective to albumin in mobilizing
ascities - More cost-effective
- Does not correct the underlying hemodynamic
abnormalities, so albumin is preferred
35G-Surgical therapy
- 1- Peritoneovenous shunt
- An implanted valve in the abdominal wall, with
cannula that empties into the vena cava - Urine output as high as 15 L in 24 hrs
- Supplemental fruosamide may be needed to prevent
vascular overload
36G-Surgical therapy
- 1- Peritoneovenous shunt
- Contraindications
- Peritonitis,
- Recurrent coma
- Sever coagulopathy
- Significant cardiac failure
- Acute alcoholic hepatitis
37G-Surgical therapy
- 1- Peritoneovenous shunt
- Complication
- Pulmonary edema
- Coagualopahty
- Fever, Wound infection, Septicemia, GI bleeding
- Reserved for patients with good renal and hepatic
function who fail standard therapies
38G-Surgical therapy
- 2-transjugular intrahepatic portosystemic shunt
(TIPS) - a radiologic procedure in which a stent is placed
in the middle of the liver to reroute the blood
flow. - it makes a tunnel through the liver connecting
the portal vein to one of the hepatic veins. - A metal stent is placed in this tunnel to keep
the track open.
39SBP
- SBP is an infection of ascites that occurs in the
absence of a contiguous source of infection. - SBP occurs in 10 to 20 of hospitalized
cirrhotic patients. - Early diagnosis is a key issue in the management
of SBP. - SBP pathogenesis in patients with cirrhosis is
considered - to be the main consequence of bacterial
translocation. -
40SBP-Predisposing factors
- Severity of liver disease
- Total ascites protein lt1 g/dL
- GI bleeding
- Bacteriuria
- Previous SBPRecurrence rates 43 by 6 mts, 69
by 1 yr and 74 by 2 yrs
41SBP-Clinical features
- signs may be absent in up to 1/3
- fever/hypothermia
- abdominal pain and tenderness
- hepatic encephalopathy
- diarrhoea
- ileus
- shock
- Unexplained deterioration in a patient with
cirrhosis and ascites should lead to diagnostic
paracentesis
42SBP-diagnosis
- A diagnostic paracentesis should be performed in
- Any patient admitted to the hospital with
cirrhosis and ascites, - Any cirrhotic patient who develops compatible
symptoms or signs - Any cirrhotic patient with worsening renal or
liver function. - Diagnosis is established with an ascites PMN of gt
250/mm3
43SBP- Treatment
- Once an ascites PMN count of gt250/mm3 is
detected, and before obtaining the results of
ascites or blood cultures, antibiotic therapy
needs to be started. - The antibiotic that has been most widely used in
the treatment of SBP is IV cefotaxime (2g 8 hrly)
with which SBP resolves in around 90 90 of
treated patients
44SBP- Treatment
- The combination of amoxicillin and clavulanic
acid was shown to be as effective and safe as
cefotaxime - Antibiotic treatment can be safely discontinued
after the ascites PMN count decreases to below
250/mm3 - duration of antibiotic therapy should be for a
minimum of 8 days
45(No Transcript)
46Prevention of recurrent SBP
- In patients who survive an episode of SBP, the
1-year cumulative recurrence rate is high, at
about 70 . - It is essential that patients be started on
antibiotic prophylaxis to prevent recurrence
before they are discharged from the hospital.
47Prevention of recurrent SBP
- Long-term prophylaxis with oral norfloxacin at a
dose of 400 mg QD - treatment should be initiated as soon as the
course of antibiotics for the acute event is
completed. - oral ciprofloxacin at a dose of 250 mg QD could
be used, although levofloxacin may be a better
alternative given its added gram-positive
coverage.
48Prevention of recurrent SBP
- Weekly administration of quinolones is not
recommended given a lower efficacy and an
increase in the development of fecal
quinolone-resistant organisms. - Prophylaxis should be continuous until
disappearance of ascites (i.e., patients with
alcoholic hepatitis who stop drinking) or
transplant
49(No Transcript)
50(No Transcript)
51Esophageal varices
- Definition
- Compensatory hemodynamic mechanism due to PHTN
- Shunting of blood supply through low-pressure
collateral veins in the esophageaus, rectum. - ? pressure in the gastric fundus and esophagus
cause swelling and burst resulting in life
threatening upper GI bleeding - Bleeding may be ? by impaired clotting system
caused by deficincies of vitamin K dependant
clotting factors - It is the leading cause of death in cirrhosis
- Considered a medical emergency
52Esophageal varices
- Goals of therapy
- Volume resuscitation
- Acute treatment of bleeding
- Prevention of recurrence
53EV-General Management
- Resuscitation
- Gastric lavage with suction of gastric fluid to
prevent complication as aspiration pneumonia - Pharmacological treatment to stop bleeding
- If PT gt 15 sec, INR. 1.7 give 10mg IV vitamin K
- Monitor electrolytes, blood gases, and urine
output - Hypovolemia
- Signs Pallor, cold clammy skin, rapid pulse, SBp
lt 80 mmHg - Blood and blood products transfusion
- Keep HCT gt 30
- Whole blood is preferred due to homeostatic
properties
54Therapy of Bleeding Varices
- 1-Vassopressin
- Powerful non-specific vasoconstrictor that
reduces blood flow in the splanchnic bed - Effective in 60 of patients
- short half-life and must be given as CIV
- May be used before sclerotherpay to slow bleeding
and visualize varices
55Therapy of Bleeding Varices
- 1-Vassopressin
- Dosing
- Use lowest effective dose because ADRs dose
related - IV bolus 20U ? IVI of 0.2-0.4 u/min Max 0.9 u/min
- Taper dose over 24-48 hrs when bleeding controlled
561-Vassopressin
- SE
- Intense vasoconstrictor action decreases C.O. and
may cause coronary ischemia - Bradycardia due to stimulation of the vagus nerve
- Abdominal cramping and Skin blanching due to
stimulation of smooth muscle contraction - Phlebitis
- Hematoma at the site of infusion
- Excess water retention and dilutioanl hyponatremia
57Therapy of Bleeding Varices
- 2-Terlipressin
- A synthetic analogue
- 80 effective
- Longer half-life and can be give as bolus every 6
hrs - Dose 2 mg
- Less cardiac side effects have been reported
58Therapy of Bleeding Varices
- 3-Somatosatin
- Natural peptide with shorter half life
- Dose bolus 50-250 mcg, infusion 250- 500 mcg/hr
- Similar efficacy to vasopressin but les side
effects and higher cost - 4- Octreotide
- Synthetic analogue of somatostatin
- Selective, potent vasoconstrictor that reduces
portal and collateral blood flow - Comparable efficacy to vasopressin
- Dose bolus 50-100 mcg followed by infusion 25-50
mcg/hr
59Sclerotherapy
- Insertion of a flexible fiberoptic esophagoscope
to directly visualize and inject a sclerosing
agent in varices to induce immediate homeostasis
?intense inflammation ? thrombus formation and
cessation of bleeding in 2-5 minutes - Permanent destruction of the vessel over several
days - Procedure may need to be repeated several times
60Sclerotherapy
- Treatment of choice
- 95 effective
- More effective that vasopressin and balloon
tamponade - Following scleotherapy, prophylaxis with
antacids, histamine blockers, omeprazole or
suclafate
61Sclerotherapy
- Complications
- Esophageal ulceration
- Stricture formation
- Esophageal perforation
- Retrosternal chest pain
- Temporary dysphasia
- Sclerosing agents
- Sodium tetradecyl sulfate
- Ethanolamine oleate
- 0.5-2 ml of the solution is injected
62Therapy of Bleeding Varices
- Alternative treatments Balloon tamponade
- After initial sclerotherapy fails before trying a
second sclerotherapy - Used for acute treatment
- 90 effective
- Direct compression of the varices
- Temporary procedure limited to time balloon is
inflated - An additional procedure required within 24 hrs
63Therapy of Bleeding Varices
- Alternative treatments Balloon tamponade
- Complication
- Aspiration
- Pneumonitis
- Esophageal ulceration
- And rupture
- Chest pain
- Asphyxia
64EV-Long-Term Management
- 1- Propranolol
- Used for secondary prophylaxis
- To reduce hepatic flow and portal pressure
- Beneficial in alcoholic cirrhosis and less
advanced disease - Does not decrease mortality
- Abrupt discontinuation may lead to rebreeding
65EV-Long-Term Management
- 2- Endoscopic Band Legation
- An elastic band is placed around the mucus a and
submucosa of the esophageal area containing the
varix - Leading to strangulation and fibrosis of the
varix as effective as sclerotherpay with less
complications - Effective in preventing rebreeding
- 3-Surgery
66EV-Long-Term Management
- Primary prophylaxis
- Primary prevention of bleeding episode
- 1-Beta-Blockers
- Studies shown beta blockers to prevent bleeding
- Using 25 reduction in heart rate or hepatic
venous gradient - Propranolol and nadolol have been used
- They do not increase survival
67EV-Long-Term Management
- Primary prophylaxis
- 2-Isosorbide mononitrate
- Can reduce portal pressure
- Combination with propranolol has greater
reduction in pressure - Similar efficacy to propranolol, with regard to
bleeding and survival - 3-Sclerotherpay
- As a primary preventive measure has a higher
mortality rate and is not recommended
683-Hepatic Encephalopathy
- a metabolic disorder of the CNS and occurs in
patients with advanced cirrhosis or fulminate
hepatitis. - Clinical Features
- Altered mental status
- Fetor heapticus sweetish musty pungent odor of
the breath - Asterixis flapping tremor, nonspecific
- Personality changes
- Drowsiness and confusion
- Deep coma, reversible
69Pathogenesis-HE
- 1- Ammonia
- The byproduct of protein metabolism
- Large portion is derived from diet or blood in
the GIT - Ammonia is metabolized to urea, which is renally
eliminated
70Pathogenesis-HE
- 1- Ammonia
- In cirrhosis serum and CNS ammonia are increased
- In the CNS it combines with alpha-ketogluarate to
form glutamine an aromatic amino acid. - High glutamine in CSF is characteristic of
encephalopathy , but it may not be the only cause
71Pathogenesis
- 2-Amino acid balance
- normal ratio of branched to aromatic AA is 4-61
- Catabolic state ? -ve nitrogen balance and
preferential use of BCAAs as a source of energy
72Pathogenesis
- 2-Amino acid balance
- Ammonia ? ? glucagons secretion stimulated ?
stimulated hepatic gluconeogenesis ? glucose from
AA ? insulin is secreted ? ? uptake and
metabolism in skeletal muscles - In liver failure , aromatic AA ? and branched
either ? or stays the same ? ratio is altered
73Pathogenesis
- As liver failure progress ? liver no longer
produce glucose for energy ? BCAA used by
skeletal muscle ? ? their level in the blood. - Plasma clearance of AAAs is ?
- The blood brain barrier become more permeable to
AAA via exchange for glutamine in the CSF
74Pathogenesis
- In the CSF the aromatic compounds are metabolized
into chemicals that disrupt normal
neurotransmitter balance - E.g. tryptophan is converted to serotonin, which
can compete with norephineprine for normal CNS
function
75Pathogenesis
- 3-Gamma-aminobuyteric acid (GABA)
- GABA is the primary inhibitory neurotransmitter
in the CNS - Activation of GABA receptors results in increased
Chloride permeability, hyper polarization of the
neuronal membrane, and inhibition of
neurotransmission. - GABA binds to postsynaptic receptors sites in the
brain, and causes the neurological abnormalities
associated with hepatic encephalopathy.
76Precipitating factors
- Increase the serum ammonia or produce excessive
somnolence in patients with impending hepatic
coma - Excess nitrogen load and metabolic or electrolyte
abnormalities may increase ammonia levels
77(No Transcript)
78(No Transcript)
79(No Transcript)
80(No Transcript)
81Treatment
- 1-removal of precipitating factor
- 2-reducing the amount of ammonia or nitrogenous
products in the blood - 3- Stop or limit protein intake at the onset of
encephalopathy - May be increased at 10-20 g/day every 2-5 days
depending on the clinical condition. - Vegetable protein may be better tolerated
because they contain fewer methionine and
aromatic amino acids are less ammoniagenic
82Drug Therapy
- 1-Lactulose
- A disaccharide broken down by GI bacteria to
lactic, acetic, and formic acid - MOA
- acidification of the colon to convert NH3 ? less
absorbed NH 4 ? lower plasma NH3 - Induce osmotic diarrhea decreases intestinal
transient time available for NH3 production and
absorption. - Dose
- Syrup 10g/15 ml
- Acute 30-45 ml TID titrated to resolution of
symptoms 3 soft stools /day. - In coma rectal retention enema 13 lactulose in
tap water - Effects appear in 24-48 hrs
83Drug Therapy-Lactulose
- Precautions
- Avoid excessive diarrhea because it could lead to
dehydration and hypokalemia which could
exacerbate encephalopathy - 20 may have gaseous distention, flatulence,
belching
84Drug Therapy
- 2-Neomycin
- MOA
- reduces plasma ammonia levels by decreasing
protein metabolizing bacteria in the GI tract - Dose
- 1-2 g orally QID
- 1 retention solution as retention enema foe
20-60 min QID
85Drug Therapy -Neomycin
- Precautions
- 1-3 of the dose can be absorbed and may cause
ototoxicity or nephrotoxicity especially with
chronic use in patients with renal failure. - Monitor serum creatinine, protein in the urine,
CrCl when using high doses are used for long
periods - May lead to reversible malabsorption syndrome
that may decrease absorption of fat, iron, vit B
digoxin, penicillin, and vit K - Comparison
- Similar effectiveness
- Neomycin produces a faster response in acute case
- A patient who does not respond to one may respond
to the other
86Drug Therapy
- Combination
- May be more effective than either drug alone
- Sterilization of gut bacteria by neomycin may
impair bacterial degradation of lactulsoe and
prevent colonic acidification - A stool PH lt 6.0 reflects synergistic effects
- Lactulose alone is preferred for long term use
- Always try lactulose first if no response try
neomycin, then try combination
87Drug Therapy
- 3-Branched chain amino acids
- Diets high in BCAA and low in AAAs may help
restore normal AA balance and reduce
encepalopathy - Heptamine is marketed as an 8 AA solution and
contains more BCAAs than standard parental
solutions - Indications
- Due to high cost and limited efficacy information
Patients with life threatening encepalopathy
refractory to conventional therapy and with
documented elevated serum ammonia levels - Hepatic-aid- Dietary supplement
88Drug Therapy
- 4-Flumazenil
- A benzodiazepine antagonist
- Bases on GABAergic neurotransmission in hepatic
encephalopathy - Demonstrated clinical improvement
- Dose chronic 25 mg BID
89Management of Compensated Cirrhosis
- Patients with compensated cirrhosis are not
jaundiced and have not yet developed ascites,
encephalopathy, or variceal hemorrhage. - Median survival is around 10 years
- Management is preventive and consists of routine
monitoring for the development of liver
insufficiency and/or the development of
complications of portal hypertension/cirrhosis.
90Assessments in compensated cirrhosis
- Liver synthetic function tests every 3 to 6
months - Screening for hepatocellular carcinoma
- Screening for EGD
- If no varices, repeat endoscopy in 2 yearsÂ
- If small varices, repeat endoscopy in 1 yearÂ
- If large varices, therapy to prevent first
variceal hemorrhage - Alphafetoprotein serum levels and liver
ultrasound every 6 months - Vaccination against hepatitis A and B in
susceptible individuals