GI Serum Tests Flashcards
Memorizing Lab Values
Calcium Total Normal Range
9.0-10.5 mg/dL
Low Calcium Significance
Malabsorption, Renal Failure, Acute Pancreatitis
Potassium
3.5-5.0 mmol/L
Low K+ Significance
vomiting, gastric suction, diarrhea, drainage from intestinal fistula
Albumin
3.5-5.0 g/dL
Low Albumin Significance
Hepatic disease
ALT alanine aminotransferase
3-35 iu or 8-20 u/L
High ALT
liver disease, hepatitis, Cirrhosis
AST Aspartate Aminotransferase
5-40 units/L
Alkaline Phosphatase
30-85 iu/L or 42-128 units
High Alkaline Phosphatase
hepatic disease, biliary obstruction
Bilirubin TOTAL
0.1-1.0 mg/dL
Bilirubin (Conjugated)
0.1-0.3 mg/dL
High Bilirubin (total)
Hemolysis, biliary obstruction, hepatic damage
Bilirubin (Unconjugated)
0.2-0.8 mg/dL
high Bilirubin (Unconjugated)
hemolysis, hepatic damage
Ammonia
15-110 mg/dL
high Ammonia
hepatic disease- cirrhosis
Xylose absorption
5-g dose in 2 hr- >20 mg/dL or >1.3 mmol/L
low Xylose
malabsorption in the small intestine
Serum amylase
56-90 i/u or 25-125 units/L
high serum amylase and lipase
acute pancreatitis
Serum lipase
0-110 units/L
Cholesterol
<200 mg/dL
High Cholesterol
pancreatitis, biliary obstruction,
Low Cholesterol
liver cell damage
CA 19-9 Carbohydrate Antigen
< 37 units/mL
High CA 19-9
cancer of pancreas, stomach, or colon. Acute pancreatitis, inflammatory bowel disease
CEA carcinoembryonic antigen
Nonsmoker- < 2.5 ng/mL
Smoker- < 5 ng/mL
High CEA
colorectal, stomach, or pancreatic cancer. Ulcerative colitis, Crohn’s disease, Hepatitis, Cirrhosis
