Lactate Dehydrogenase, Total

Alternative Names/Synonyms	LDH
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	LDSER, LDSEP

Clinical Significance (If applicable)

Assisting in evaluating a variety of diseases (cardiac, renal, liver, hematological).

Monitoring changes in tumour burden subsequent to chemotherapy.

Specimen Requirements (Sample Type)

Serum, Plasma

Specimen Requirements (Volume (mL))

0.5 mL

Specimen Requirements (Tube Type)

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

Draw (mL)

4.5 mL

Collection Requirements

Collection Instructions

Sample Stability

Room Temperature: 7 days

Fridge: 4 days @ 2-8°C

Frozen: 6 weeks @ -20°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas c 702, enzymatic

Test Availability

24 hours a day, 7 days a week

STAT Turnaround Time

1 hour

Routine Turnaround Time

3 hours

Reference Ranges

135 - 225 U/L
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688