Choice and evaluation of clinical laboratory parameters in hepatic and bile diseases.
Basic laboratory tests:
- urine (protein, рН, glucose, blood, urobilinogen, bilirubin, sediment)
- Hematology parameters (CBC, DBC, ESR).
- Clinical chemistry parameters (enzymes, bilirubin)
Extended laboratory tests:
- Hematology (reticulocytes, PT, fibrinogen)
- Serum (total protein, albumin, electrophoresis of serum proteins, glucose, enzymes, Iron, Cu, cholesterol, electrolytes.
Specialized laboratory tests:
- ammonia concertation in plasma;
- individual proteins of the acute phase – haptoglobin, transferrin, ceruloplasmin; ferritin; lipoproteins;
- enzymes – isoenzymes of LDH and AP; clotting factors – II, V, VII; bile acids.
- Specific markers in serum – HbsAg, HBeAg, PSR for HCV- RNA;
- tumor markers (АFP, СЕА,), protocollagen III, collagen III, collagen I.
Enzymes in liver diseases:
- GGT and AP – in cholestasis, high activity of GGT only- drug or alcohol induction. CHE- decreased in disturbance in the protein synthesis in hepatocytes.
- АSАТ and АLАТ – give information about the severity of the disease, the degree of exacerbation and the stage of the chronic illness.
- GIDH– for evaluation of the severity and the damage of the hepatocytes in the differential diagnosis of icterus
- AP and GGT- in differential diagnosis of cholestasis and toxic damages.
- LDH – metastases in liver and in hemolysis.
- CHE –for evaluation of synthesis capacity of hepatocytes in acute and chronic processes.
Changes in activity of the enzymes in liver and bile diseases:
- Viral hepatitis: Mild hepatitis only cASAT, ALAT and LDH elevated, In Sever damage AP, GGT mASAT is elevated and CHE is decreased
- Acute Alcohol damage: GGT is increased more than 10 times over the reference range. AP is not high, ALAT and ASAT moderately elevated
- Bile Duct disease: in first days ASAT and ALAT elevated at the start, GIDH very high, Ratio of ASAT:ALAT is less than 1. On third day ASAT and ALAT reduces and back to normal on 5-6 day. AP and GGT continues to increase.
Changes in Serum Proteins in Liver and bile duct diseases:
Chronic liver disease: hypoalbuminemia with hypergammaglobulinemia and hyperproteinaemia
Acute viral hepatitis: prealbumin↓, factors of coagulation ↓ II, V, VII, IX, X, CHE ↓