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A2 pre-analytical factors (pre-collection (biological, physical),…
A2 pre-analytical factors
pre-collection
biological
physical
post-collection
overnight
wbc metabolism
use all glucose, x ATP, release cell content
h K, h LDH, h AST, h PO4
collection
drip arm
normal saline NaCl
dilute
dextrose water with KCl
dilute, h K
tube
EDTA contam
h K, l Ca, l Zn l Mg: l ALP
h heparin
l HCO3, h CO2, l pH
air bubbles
h CO2, l CO2
in vitro hemolysis
h K, h LDH, h AST