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Preanalytic factors
Collection, processing and storage factors that affects chemistry results
Question | Answer |
---|---|
Squeezing site of capillary puncture | ↑K |
Pumping fist during veipuncture | ↑ 1.K 2.Lactate 3.Ca 4.PO4 ↓ pH |
Tournquet > 1min | ↑ 1.K 2.Total protein 3.Cholesterol 4.Fe |
Hemolysis | ↑ 1.K 2.Mg 3.PO4 4.LD 5.AST 6.Fe 7.Total protein 8.Ammonia |
Light exposure | ↓ 1.Bilirubin 2.Carotene |
Delay in serum separation | ↑ 1.Ammonia 2.Lactate 3.K 4.Mg 5.LD ↓ Glucose |
Storage at room t | ↑ 1.Lactate 2.Ammonia ↓ Glucose |
Storage at 4C | ↓ LD |