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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Lactate

Test Code(s): LACT / GM2255

CPT Code(s): 83605

Methodology: Electrode

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: Up to 30 minutes. All requests processed stat.

Specimen Requirements

Specimen: Arterial, venous, or capillary

Collection Instructions: Must be free of bubbles and clots.

Collection Container: Preferred: Radiometer PICOŽ syringe
Also Acceptable: 2 full Radiometer capillary tubes, Green cap with yellow ring (PST), Green top

Collection Volume: Preferred: 1.5 mL
Pediatrics: 0.5 mL

Sample Analyzed: Whole Blood or Plasma

Volume Required: Preferred: 1.5 mL
Pediatrics: 0.5 mL

Specimen Transport: Whole blood: Transport specimen to UWHC Core Laboratory (B4/220) immediately.

Plasma: Specimen must arrive in the UWHC Core Lab within 4 hours.

Unacceptable Criteria: Clotted specimens and specimens past stability time are not acceptable.

Stability: Ambient: Whole Blood: 30 minutes; Plasma: 4 hours
Refrigerated: Plasma: 4 hours
Frozen: Not acceptable


Reference Interval:

0 days and up:  0.0 - 2.0 mmol/L

Critical Calls: View

Lactic Acid

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