Clinics and Departments

Laboratory Services

Lab Dept:

Chemistry

Test Name:

PYRUVATE, BLOOD

General Information

Lab Order Codes:

PYRV

Synonyms:

Pyruvic Acid, Blood

CPT Codes:

84210 - Pyruvate

Test Includes:

Blood pyruvate concentration reported in mmol/L and mg/dL.

Logistics

Test Indications:

Pyruvate, in conjunction with lactate determined from a blood sample collected at the same time, is used to assess the lactate-to-pyruvate (L/P) ratio. The L/P ratio is considered a helpful (not diagnostic) tool in the evaluation of patients with possible disorders of mitochondrial metabolism. Pyruvic Acid levels alone have little clinical utility.

Lab Testing Sections:

Chemistry - Sendouts

Referred to:

Mayo Medical Laboratories (MML Test: 8657/PYR)

Phone Numbers:

MIN Lab: 612-813-6280

STP Lab: 651-220-6550

Test Availability:

Monday, Wednesday and Friday

Turnaround Time:

1 - 5 days

Special Instructions:

Special collection tubes containing 6% perchloric acid must be obtained from the laboratory (Mayo Supply T012). See Patient Preparation. See Collection.

Specimen

Specimen Type:

Whole blood

Container:

Special collection tube containing 2.5 mL of 6% perchloric acid pre-chilled prior to draw

Draw Volume:

1 mL blood

Processed Volume:

Same as Draw Volume

Collection:

Draw blood (enough to transfer 1 mL) in a syringe and immediately transfer exactly 1 mL of blood into the pre-chilled special collection tube. Then shake the tube vigorously to mix. Send the tube immediately to the laboratory.

Note: Specimen should not be collected by capillary draw. Collection tubes have a 12 month outdate, so make sure to check the expiration date on the tube before using.

Special Processing:

Lab Staff: Do Not centrifuge. Send whole blood specimen in original collection container at refrigerated temperatures. Forward promptly.

Patient Preparation:

4 hour fast preferred

Sample Rejection:

Specimen improperly collected, wrong collection tube used, mislabeled or unlabeled specimens

Interpretive

Reference Range:

Note: Results will be reported in both mmol/L and mg/dL.

0.08 – 0.16

mmol/L

0.7 – 1.4

mg/dL

Critical Values:

N/A

Limitations:

Correct sample collection and handling is crucial to achieve reliable results. Abnormal concentrations of pyruvic acid, and lactate-to-pyruvate (L:P) ratios, are not diagnostic for a particular disorder but must be interpreted in the context of the patient’s clinical presentation and other laboratory studies. The determination of pyruvic acid is of diagnostic value when lactic acid is measured and the L:P ratio is established in the same specimen. When comparing blood and cerebrospinal fluid (CSF) L:P ratios, blood and CSF specimens should be collected at the same time.

Methodology:

Spectrophotometry (SP)

References:

Mayo Medical Laboratories April 2011

Updates:

6/21/2004: Test moved from Fairview University Diagnostic Laboratories to Mayo Medical Laboratories. Note: Test reference range previously reported as: Adult: 0.05 - 0.15 mmol/L and methodology previously was enzymatic.
4/4/2011: Added mg/dL reference range and information for pre-chilling collection tubes.



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