Test Overview
Method
Liquid chromatography-tandem mass spectrometry (LC-MS/MS)
Result Included
Vitamin A
Aliases/Synonyms
Retinol
Specimen
Specimen Type
Gel-separator tubes are not acceptableSerum
Plasma (EDTA)
Plasma (Li Heparin)
Containers
Collection Containers
Red top (no additive); Lavender top (EDTA); Green top (Li heparin)
Volume
Sample Volume
2 mL
Minimum Volume
1 mL
Specimen Comment
Avoid gel separator tubes
Patient Preparation
Fasting (12 – 14 h) recommended but non-fasting is acceptable. Avoid vitamin supplementation for 24 hours prior to collection.
Collection & Handling
Collection Instructions
Avoid hemolysis.
Handling Information
Store and submit specimen protected from light in an amber vial.
Store and send frozen.
Stability
| Refrigerated | Frozen |
|---|---|
| 28 days | 28 days |
Rejection Criteria
| Criteria | Specification |
|---|---|
| Specimen | Gel-separator tube or not protected from light |
Performance & Interpretation
Turnaround Time
12 days
Results
Name
Units
Reference Range
Conversion
-
Vitamin Aµmol/L0 - <1 year: 0.4 - 2.3
1 - <12 years: 0.8 - 1.9
12 - <:20 years: 1.0 - 2.6
20 - <40 years: 1.1 - 3.1
40 - <60 years: 1.2 - 3.5
≥60 years: 1.3 - 3.8µg/dL x 0.035
Interface & Setup
HL7 Interface Codes
| Order Code | Result Name | Result Codes | Units |
|---|---|---|---|
| VITA | Vitamin A | 8872 | umol/L |
Test Version
Last Updated
2023-01-19