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Test Code PYRC Pyruvate, Spinal Fluid

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Reporting Name

Pyruvic Acid, CSF

Specimen Type

CSF


Additional Testing Requirements


This test does not calculate the lactate:pyruvate ratio. To obtain this information, both this test and LASF1 / Lactic Acid, Spinal Fluid must be ordered. The ratio can be calculated from the results obtained from these tests.



Specimen Required


Specimen Type: Spinal fluid

Container/Tube: Sterile vial

Specimen Volume: 0.6 mL

Collection Instructions: Send specimen from vial 4.


Reject Due To

Gross hemolysis Reject

Specimen Stability Information

Specimen Type Temperature Time Special Container
CSF Refrigerated (preferred) 7 days
  Frozen  14 days
  Ambient  7 days

Specimen Minimum Volume

0.5 mL

Day(s) Performed

Monday, Wednesday

Specimen Retention Time

2 months

Report Available

4 to 8 days

Reference Values

0.06-0.19 mmol/L

Useful For

Investigating possible disorders of mitochondrial metabolism, when used in conjunction with cerebrospinal fluid lactate, collected at the same time, to determine the lactate-to-pyruvate (L:P) ratio

 

Evaluating patients with neurologic dysfunction and normal blood L:P ratios

Testing Algorithm

For more information see: Epilepsy: Unexplained Refractory and/or Familial Testing Algorithm

CPT Code Information

84210

LOINC Code Information

Test ID Test Order Name Order LOINC Value
PYRC Pyruvic Acid, CSF 14122-6

 

Result ID Test Result Name Result LOINC Value
83356 Pyruvic Acid, CSF 14122-6

Genetics Test Information

The cerebrospinal fluid lactate:pyruvate (L:P) ratio is considered a helpful (not diagnostic) tool in the evaluation of patients with possible disorders of mitochondrial metabolism, especially in patients with neurologic dysfunction and normal blood L:P ratios. Pyruvic acid levels alone have little clinical utility.