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Test Code NBLD0338 Lactic Acid, CSF

Useful For

Identifying increased glycolysis or hypoxia associated with bacterial meningitis, cerebral infarction, cerebral arteriosclerosis, intracranial hemorrhage, hydrocephalus, traumatic brain injury, cerebral edema, epilepsy, and inborn errors of metabolism. Lactate measurement in CSF has been proposed as a test to differentiate bacterial from viral meningitis.

Methodology

Lactate to Pyruvate/NAD to NADH/Calibrated/37° C/Bichromatic End point

Performing Laboratory

Bozeman Health Laboratory Services

Specimen Requirements

Specimen Type: Spinal fluid

Container/Tube: Screw-capped, sterile tube

Specimen Volume: 1 mL

Specimen Minimum Volume: 0.5 mL

Collection Instructions:

1. Label tube(s) with patient’s name (first and last), date and actual time of collection, and in order of collection 1, 2, 3, etc.

2. Maintain sterility and forward promptly. Do not send by pneumatic tube.

Additional Information: This test will be performed on tube #2 or #3 of tubes submitted from spinal fluid collection.

Specimen Transport Temperature

Ambient

Specimen Stability

 

Specimen Type Temperature Time
Spinal fluid Ambient 1 hour

 

Reference Values

0.6-2.2 meq/L

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

83605