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LDH
(a.k.a Lactate Dehydrogenase)
minimum sample volume required ~ 5ml
Test Code: LDH
Tube type: SST
Other acceptable tube types
Lithium heparin (pale green)
Special instructions
None
Reference Range
0 - 14 days: <1020
15 days - <1 year: <380
1 - <10 years: <270
10+ years: <250
Units
IU/L
Linked to
Bicarbonate
Turnaround Time
1
day
Department: Biochemistry
Clinical Application
Limitations
LDH is affected by haemolysis. Raised LDH results in moderately haemolysed samples will be reported with a cautionary comment indicating that results may be falsely increased by up to 30% in presence of in vitro haemolysis.
LDH concentrations of ≥2000IU/L can falsely increase bicarbonate concentrations by up to 12%. All bicarbonate requests will have an LDH measured and appropriate comment applied to the bicarbonate result where LDH is ≥2000IU/L.
Webpage updated: November 2025.
