Fractionated metanephrines, Free Metanephrine, Metanephrines Free, urine, NMN, urine, Normetanephrine, free, Normetanephrines, urine
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Metanephrines – Fractionated LC-MS/MS, 24 hr Urine
Test ID: METF U
Test
Aliases/Synonyms
Method
LC-MS/MS
Report Includes
Free Normetanephrine; Free Metanephrine; Free Normetanephrine, 24hr; Free Normetanephrine/Creatinine Ratio; Free Metanephrine, 24hr; Free Metanephrine/Creatinine Ratio; 3-Methoxytyamine; 3-Methoxytyramine, 24hr; 3-Methoxytyramine/Creatinine Ratio; Volume; Creatinine/L; Creatinine/d
Specimens
Urine (24 hr)
Test Location
St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8
Test Version
21-Dec-2023
Specimen
Specimens
Urine (24 hr)
Sample Volume
25 mL
Patient Preparation
Restrict caffeine, nicotine and alcohol for 24 hours prior to collection. Discontinue Methyldopa (Aldomet) at least 5 days prior to collection. Avoid reserpine, alpha methyldopa, levodopa, monoamine oxidase inhibitors.
Collection & Handling
Collection Instructions
Collect urine in a container with 25 mL 6 mol/L (6N) HCl. It is important that the urine is refrigerated during the collection.
Handling Information
The final pH of the urine must be 2.0 – 4.0. State 24 hour collection volume and collection date.
Stability
| Refrigerated | 1 month |
|---|---|
| Frozen | >1 month |
Test Version
21-Dec-2023
Performance / Interpretation
Method
LC-MS/MS
Turnaround Time
10 days
Results
| Name | Units | Reference Range | Conversion Factor | |
|---|---|---|---|---|
| Volume | L |
|
||
| Creatinine | nmol/L |
|
||
| Creatinine/d | mmol/d |
|
||
| Free Normetanephrine | nmol/L |
|
||
| Free Metanephrine | nmol/L |
|
||
| Free Normetanephrine, 24hr | nmol/d |
|
||
| Free Normetanephrine/Creatinine Ratio | nmol/mmol creatinine |
|
||
| Free Metanephrine, 24 hour | nmol/d |
|
||
| Free Metanephrine/Creatinine Ratio | nmol/mmol creatinine |
|
||
| 3-Methoxytyamine | nmol/L |
|
||
| 3-Methoxytyramine, 24hr | nmol/d |
|
||
| 3-Methoxytyramine/Creatinine Ratio | nmol/mmol creatinine |
|
||
Test Location
St. Michael's Hospital, 30 Bond Street, Toronto ON M5B 1W8
Test Version
21-Dec-2023
Interface / Setup
HL7 Interface Codes
| Order Code | Result Codes | Units |
|---|---|---|
| METF U | 63310Normetanephrine Uncalculated Free | nmol/L |
| 63311Metanephrine Uncalculated Free | nmol/L | |
| 6331224h Normetanephrine Free | nmol/d | |
| 63313Normet/Crt Ratio | nmol/mmol creat | |
| 6331424h Metanephrine Free | nmol/d | |
| 63315Met/Crt Ratio | nmol/mmol creat | |
| 633163-Methoxytyamine Uncalculated | nmol/L | |
| 633173-Methoxytyramine, 24h | nmol/d | |
| 633183-Methoxy/Creat Ratio | nmol/mmol creat | |
| 7601Volume | L | |
| 7637Creatinine/L | mmol/L | |
| 7602Creatinine/d | mmol/d |
Test Version
21-Dec-2023