Lactate Dehydrogenase (LDH), Body Fluid


See Also Lactate Dehydrogenase (LDH), Serum/Plasma


LDH is decreased in lavage fluid in pulmonary alveolar proteinosis. LDH is a normal component of CSF. Increased amounts may occur in association with ischemic necrosis, meningitis, leukaemia, metastatic cancer of the CNS, and lymphoma. CSF LDH is higher in stroke than in transient ischemic attack. LDH measurement is used in the differential diagnosis of intracranial haemorrhage in neonates versus traumatic tap. LDH is elevated in proportion to severity of CNS haemorrhage, but unchanged by traumatic tap.

Sample Type, Quantity & Conditions

1 ml Body Fluid Stability: 7 Days at 15-25 °C 48 Hours at 2-8 °C

Special Precautions

Normal Range

Transudate: < 200 U/L Exudate: > 200 U/L

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