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Carnitine – Free and Total, Serum/Plasma

Test ID: CARNI

Test

Method

LC-MS/MS

Method Description

Quantitation using non-derivatized method (LC-MS/MS).

Report Includes

Free Carnitine; Total Carnitine

Specimens

Serum; Plasma

Test Location

Hospital for Sick Children, 555 University Avenue, Toronto ON M5G 1X8

Test Version

26-Jun-2023

Specimen

Specimens

Serum; Plasma

Collection Containers

Preferred

Red Top (no additive)

Acceptable

Green Top (Sodium Heparin); Green Top (Lithium Heparin)

Sample Volume

1 mL

Minimum Volume

0.5 mL

Collection & Handling

Handling Information

Separate within 1 hour of collection. Store and send frozen.

Additional Information

Please provide age, gender and clinical history to facilitate interpretation of analytical findings and recommendation of further testing or consultation.

Stability

Refrigerated 1 day
Frozen >1 Day

Test Version

26-Jun-2023

Performance / Interpretation

Method

LC-MS/MS

Method Description

Quantitation using non-derivatized method (LC-MS/MS).

Turnaround Time

12 days

Results

Name Units Reference Range Conversion Factor
Free Carnitine µmol/L
  • <16 d: 12.0 - 60.0
  • ≥16 d: 26.0 - 60.0
Total Carnitine µmol/L
  • <16 d: 23.0 - 84.0
  • ≥16 d: 32.0 - 84.0

Test Location

Hospital for Sick Children, 555 University Avenue, Toronto ON M5G 1X8

Test Version

26-Jun-2023

Interface / Setup

HL7 Interface Codes

Order Code Result Codes Units
CARNI 2790Free Carnitine umol/L
2791Total Carnitine umol/L

Test Version

26-Jun-2023