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Preanalytic factors

Collection, processing and storage factors that affects chemistry results

QuestionAnswer
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
Created by: Teresa_indigo
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