Home
HelpTest Code Methotrexate Methotrexate Level
Specimen Requirements
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin)
Volume: 4.5mL
Minimum Volume: 0.5mL plasma
Collection Instructions: Protect sample from light with aluminium foil and send to the Laboratory immediately.
Sample Stability
** Preferred temperatures for storage prior to and during shipping to NUH **
| Specimen Type: | Plasma |
|---|---|
| Ambient: | 1 day |
| Refrigerate: | 2 days |
| Frozen: | 6 months |
Reference Interval
| Post treatment | 5.00 - 10.00 umol/L |
|---|---|
| 24 - 48 hours | 0.50 - 1.00 umol/L |
| 48 - 72 hours | < 0.20 umol/L |
Call back values: NA
Days and Times Performed
24 hours, TAT 1 day
Methodology
Chemiluminescent Microparticle Immunoassay (CMIA)
Service Code
31819
Update
Last updated 26/02/2022
Unacceptable Condition
| Haemolysis | NA |
|---|---|
| Icterus | NA |
| Lipaemic | NA |
| Others | Samples not protected from light |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Therapeutic drug monitoring