Liver Function (Part 2) Flashcards
ESSAY
Pre-Hepatic jaundice
-Four specific causes
Hemolysis, ineffective erythropoiesis, increased turnover of non hemoglobin heme compounds, hematoma
ESSAY
Pre-hepatic jaundice
-general cause
any process that causes premature RBC destruction and increased production of unconjugated bilirubin
ESSAY
Pre-hepatic jaundice
-explanation of typical serum total, unconjugated and conjugated bilirubin levels, urine bilirubin level, fecal and urine urobilinogen levels (increased or decreased)
unconjugated: increased; conjugated: Normal; urine bilirubin: Neg/normal; fecal and urine urobilinogen: increased
ESSAY
Post-hepatic jaundice
-General cause
caused by any process that prevents excretion of conjugated bilirubin (biliary obstructive disease)
ESSAY
Post-hepatic jaundice
-Three specific causes
Ductal occlusion by stones, spasms or strictures, compression by neoplastic diseases (tumors)
ESSAY
Post-hepatic jaundice
-Explanation of typical serum total, unconjugated and conjugated bilirubin, urine bilirubin level, fecal and urine urobilinogen levels (increased or decreased)
Serum total: increased; unconjugated: Normal; conjugated: increased; urine bili: positive; fecal and urine urobili: decreased to absent
ESSAY
Post-Hepatic jaundice
-four enzymes that are elevated to a significant degree
ALP, GGT, LAP, 5’-NT
In hepatic (hepatocellular) jaundice the hepatocyte itself is sick; which functions are impaired?
Normal functions of uptake, conjugation, and/or excretion of bilirubin are impaired
ESSAY
Hepatocellular Disease
-Causes
all 3 processes (uptake, conjugation, and exretion of bilirubin) are impaired
Most common cause is HEPATITIS
ESSAY
Hepatocellular Disease
-1 Expected serum total, 2 unconjugated, and 3 conjugated bilirubin levels
1 increased 2 increased 3 increased
ESSAY
Hepatocellular Disease
-Urine bilirubin level
positive
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Hepatocellular Disease
-fecal and urine urobilinogen levels
normal to decreased
ESSAY
Hepatocellular Disease
-Elevated enzymes in hepatitis
AST, ALT (ALT>AST), ALP, LD4/LD5, ammonia
Remember cannot detoxify ammonia to urea so the BUN will be low!
ESSAY
Gilbert’s Disease
-Causes
Pre-conjugation transport failure
ESSAY
Gilbert’s Disease
-1 serum total, 2 unconjugated, and 3 conjugated bilirubin
1 increased 2 increased 3 decreased
ESSAY
Gilbert’s Disease
-urine bilirubin
Negative
ESSAY
Gilbert’s Disease
-fecal and urine urobili
decreased (normal)
ESSAY
Crigler-Najjar syndrome
-causes
conjugation failure
ESSAY
Crigler-Najjar syndrome
-expected 1 serum total, 2 unconj, and 3 conj
1 increased 2 increased 3 decreased
ESSAY
Crigler-Najjar syndrome
-urine bili
NEgative
ESSAY
Crigler-Najjar syndrome
-fecal and urine urobili
decreased