Sterile vial/container
Ambient (preferred) - 14 days
Refrigerated - 7 days
Frozen - 14 days
Freeze/thaw cycles - stable x 3
Kinetic
Amniotic: >60% of the serum LDH (malignant)
CSF: Not established
Gastric: <30 U/L
Saliva (mixed glands): 113 - 609 U/L
Synovial: <240 U/L
A fluid LD activity nearly equal to the plasma activity is usually associated with inflammatory processes.