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Test Code Fl LDH Fluid, Lactate Dehydrogenase

Patient Preparation

No special patient preparation required

Special Collection Instructions

Source must be noted

Collection Method

Sterile body fluid collection

Minimum Volume

  • Adults: 0.4 ml
  • Pediatric: 0.25 ml

Container

Sterile Urine Cup

Preferred Specimen

Sterile container

Acceptable Specimens

Body fluids

Reference or Target Ranges

No reference values available for body fluid sources

Reportable Units

U/L

Critical Value

Not defined for this assay

Reasons for Rejection



<!-- Rejection-->
Hemolysis Threshold
 40 mg/dL
Icterus Threshold
 60 mg/dL
Lipemia Threshold
 900 mg/dL
Other
 QNS, contaminated, improperly Labeled, improper specimen type

Specimen Stability



<!-- Stability -->
Ambient
 7 days
Refrigerated (4°C to 8°C)
 4 days
Frozen(-40°C to 0°C)
 6 weeks

Performance Information



<!-- Performance information -->
Days and Time Performed
 24/7
Expected Turn Around Time
 Stat: 1 hour
Routine: 4 hours
Stat Availabilty
 Yes
Performing Bench
 UH Chemistry, WCH Chemistry
Methodology/Method Description
 Roche Cobas – Two site enzymatic assay

Additional Information/Important Notes

In connection with certain diseases (e.g. hepatopathy, diseases of skeletal muscle, malignant tumors), the LDH-4 and LDH-5 isoenzyme portions are increased and unstable in cooled and frozen samples; this may lead to an incorrct LDH value in samples collected from patients suffering from such diseases.

CPT Codes

83615