Tutorial title - Hepatobiliary System - LFTs

5 important questions on Tutorial title - Hepatobiliary System - LFTs

What are the purposes of LFTs?

The purposes of LFTs are:
  1. Detect the presence of liver disease.
  2. Diagnostic evaluation (mild, moderate, severe).
  3. Monitor disease progression.
  4. Distinguish among different types of liver disorder.

How are LFTs classified under synthetic function?

Under synthetic function, LFTs are classified as:
  1. Serum proteins:
    • Albumin: marker of chronicity, low serum half-life.
    • Immunoglobulins: compensatory production.
    • Alpha fetoprotein: screening for congenital malformation, tumor marker.
  2. Prothrombin time: prolonged in liver disorder, indicates liver coagulopathy.

What are the serum enzymes involved in LFTs?

Serum enzymes in LFTs include:
  • ALT, AST: indicating hepatocellular damage.
  • ALP, GGT: indicating obstruction.
  • Excess alcohol consumption.
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What is the detoxification function in LFTs?

Detoxification function involves:
  1. Blood ammonia: accumulates in liver & lungs.
    • Hepatic encephalopathy features: cerebral edema, mutism, nervous, insomnia.
    • Acute respiratory distress syndrome.

What is involved in the excretory function of LFTs?

Excretory function involves:
  1. Serum bilirubin: conjugated, unconjugated.
  2. Bile: urine, bile pigments, bile salts, urobilinogen.

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