Dr Yasir M Khayyat,MBcHB,FRCPC,FACP 1 Khayyat Y. LFT WhyHowWhenWHO 600 ريال 2 Khayyat Y.
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Transcript of Dr Yasir M Khayyat,MBcHB,FRCPC,FACP 1 Khayyat Y. LFT WhyHowWhenWHO 600 ريال 2 Khayyat Y.
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Dr Yasir M Khayyat,MBcHB,FRCPC,FACP
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Khayyat Y
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600
ريال2
Khayyat Y
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Hepatocellu
lar
Necrosis
Markers
INR
Markers of Cholestasis
Markers
of
syntheti
c
function
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AST
ALT
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ALT: Specific from the liver ,Cytosolic Enzyme AST: Muscle(skeletal ,
Cardiac),Brain,Kidney,Pancreas, cytoslic 20% and mitochondrial 80%.
Levels are normal in advanced cirrhosis AST/ALT ratio : Acute liver injury ≤ 1 , Alcoholic
hepatitis > 2 Its elevation does not correlate with
hepatic necrosis.6
Khayyat Y
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In Alcoholic liver disease
AST Alcohol increase release of mitochondrial AST
ALT in alcohol there is pyridoxal 5 deficiency with decrease in ALT > AST activity
In NAFLD,chronic liver disease:AST ( early low ,then with progressive disease and cirrhosis increase) ,
advanced cirrhosis decrease hepatic clearance of AST.
ALT
Khayyat Y
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Alkaline phosphatase: From
Liver,Bone,Kidney,placenta,leukocytes,various neoplasms.
From the apical membrane of the hepatocyte and luminal domain of the bile duct.
Predominantly in infiltrative hepatic disorders, biliary obstruction ,extrahepatic biliary tree obstruction.
Due to increased de novo synthesis rather than release of the stored enzyme or impaired clearance
GGT ( Gamma Glutamyl Transpeptidase)
From kidney,spleen,pancreas,heart,lung,brain 8
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Bilirubin Conjugated Bilirubin Unconjugated BilirubinMarkers of Hepatic Synthesis: INR or PT : The liver is factory for all coagulation
factors except 8. INR if dependant on Vit K ( 2,7,9,10) Increased in: vitamin K
deficiency( malnutrition-malabsorption-antibiotic use)warfarin use, consumptive coagulpathy.
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Albumin : Synthesize 10g by the liver daily. It is
not only reflect liver status but it reflects nutritional and volume status, vascular integrity,catabolism,hormonal factors, loss in the urine or stool.
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Khayyat Y
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Marked Elevations > 2000
> 15 folds
Moderate Elevations
250-10005-15 folds
Mild persistent Elevation < 250
≤ 5 folds
Drug inducedAnyNAFLD
Toxin inducedAutoimmune hepatitisAlcohol use
Ischemic liver injury ( shock)
Alpha one alpha antitrypsin deficiency
Chronic hepatitis C Infection
Autoimmune hepatitisWilson diseaseCirrhosis
Acute viral hepatitisDrug inducedNeoplasms
Hemochromatosis
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Infectious HepatobiliaryMiscellaneous
TBPBCBerylliosis
Atypical Mycobacteria
Sarcoidosis
BrucellosisDrugs
Candidasis
Syphilis
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