Vitamin C

Label Mnemonic:	VTC
Epic code:	LAB4253
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Commercial Mailout Laboratory
6240-8 RCP
356-8593

Specimen(s):

Plasma

Collection Medium:

Plasma Separator Tube 4.5 mL

Minimum:

Preferred Minimum: 0.5 mL plasma
Absolute Minimum: 0.3 mL plasma

Rejection Criteria:

EDTA plasma, whole blood, or body fluids. Grossly hemolyzed specimens.

Delivery Instructions:

Wrap tube in aluminum foil to protect from light. IMMEDIATELY place tube in ice and delivery to the laboratory.

Turn Around Time:

1-6 days upon receipt at reference laboratory

Reference Range:

23-114 μmol/L

Interpretive Data:

Vitamin C concentrations lower than 11 μmol/L indicate deficiency. Concentrations between 11 and 23 μmol/L are consistent with a moderate risk of deficiency due to inadequate tissue stores.

Vitamin C concentration is reported as micromoles per liter (μmol/L). To convert concentration to milligrams per deciliter (mg/dL), multiply the result by 0.0176.

Comments:

Note: Fasting specimen preferred. Thawing and refreezing of the specimen and exposure to light will result in decreased Vitamin C concentration.

Methodology:

Quantitative High Performance Liquid Chromatography

CPT Code:

82180

See Additional Information:
Specimens Requiring Immediate Delivery