LACTATE DEHYDROGENASE

Mnemonic

LDH

Synonym

LDH - LD - L-Lactate: NAD+ oxidoreductase - EC 1.1.1.27

Specimen Collection Requirements

Collect

Serum or Plasma, one 5.0 mL gold (SST) or 3.0 mL mint green (lithium heparin, PST) top tube

Handling

Allow serum to clot completely at room temperature (minimum: 30 minutes). Preferrably, separate serum or plasma from cells before transport. It is better to not refrigerate or freeze specimen, but to hold at room temperature (15-25°C) with analysis done ASAP.

Preferred Volume

0.5 mL

Minimum Volume

0.3 mL

Transport

INPATIENTS: Room temperature (15-25°C), run specimen imediately, OUTPATIENTS: Refrigerated (2-8C°)

Rejection Criteria

Hemolyzed, frozen, specimens collected in EDTA, potassium oxalate or sodium fluoride as anticoagulants

Stability

Lithium heparin specimens (PST) are stable up to 1.5 days refrigerated (2-8°C) on the primary spun gel tube. AFTER SEPARATION FROM CELLS: Ambient (15-25°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): Unacceptable

Testing Information

Performed

7 days/week

Method

Enzymatic

Referral Lab

Samaritan Health Services Laboratories

Reference Values

Reference Values

ADULT: 135-225 U/L

CPT Codes

83615

Last Updated: Thursday, January 5, 2017 03:42:18 AM