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LIVER FUNCTION TESTS
FUNCTIONS OF LIVER
LIVER FUNCTION TES class .ppt for nursing students
According to function of liver
According to function of liver
Classification of LFT
Tests based on synthetic function
Tests based on synthetic function
Tests based on excretory function
Tests based on excretory function
Tests based on detoxification function
Tests based on detoxification function
Tests based on metabolic function
Tests based on metabolic function
Determination of serum enzymes
Determination of serum enzymes
I
II
III
IV
V
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
Tests related to
CARBOHYDRATE
metabolism
Tests related to LIPID
metabolism
Tests related to
PROTEIN metabolism
Galactose tolerance
test Serum cholesterol
Serum proteins
Aminoaciduria
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
1.Serum bilirubin
• Serum bilirubin estimation is based on van den Berg’s diazo
reaction.
• Diazo reagent consists of diazotized sulfanic acid
Determination of Serum Bilirubin
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
LIVER FUNCTION TES class .ppt for nursing students
Laboratory results
S Bilirubin
U
Urobilinogen
U
Bilirubin
F
Urobilinoge
Conjugated Unconjugated
Normal
0.1-0.4mg/
dl
0.2-0.7mg/dl 0.4mg/day Absent 40-280mg/
day
Prehepatic
Normal Increased Increased Absent Increased
Hepatic
Increased Increased N/Decreased Present Decreased
Posthepatic
Increased Normal Absent Present Trace to
absent
LIVER FUNCTION TES class .ppt for nursing students
Tests b/o detoxification function
Liver is the main source of synthesis of
Plasma proteins
- Albumin
- Globulin(except γ)
Blood clotting factors
- Prothrombin and
factors V, VII and X.
Tests b/o synthetic function
Determination of serum albumin and
globulin
Albumin/globulin
ratio
= 1.2:1 to2.5:1
Determination of Prothrombin time
Tests related to
CARBOHYDRATE
metabolism
Tests related to LIPID
metabolism
Tests related to
PROTEIN metabolism
Tests b/o metabolic function
Galactose tolerance
test Serum cholesterol
Serum proteins
Aminoaciduria
• In liver cell injury, damage to the membrane of cells and
organelles allows intracellular enzymes to leak into the blood.
• Where their elevated concentrations can be measured
Enzymes in diagnosis of liver disease
LIVER FUNCTION TES class .ppt for nursing students
Serum transaminases
AST or SGOT=<35U/L
ALT or SGPT=<40U/L
S. alkaline phosphatase
ALP= 3-13KA units/dl
ALP is normally
excreted through bile
↑↑↑In obstructive
jaundice
Enzymes in liver disease
Enzyme Prehepatic
Jaundice
Hepatic
Jaundice
Obstructive
Jaundice
ALT or AST Usually normal Marked increase
500-1500IU/L
Increased
100-300IU/L
ALP Normal Increased
slightly
< 30KA/dl
Marked increase
>30KA/dl
Enzyme assays in differential
diagnosis of Jaundice
Other enzymes
Thank you

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LIVER FUNCTION TES class .ppt for nursing students