Test Details
Methodology
Immunoassay
Result Turnaround Time
3 - 5 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Test Includes
Cannabinoids (THC); creatinine; cannabinoid:creatinine ratio
Use
Cannabinoid concentration is normalized using creatinine to correct for diurnal fluctuations in fluid intake and urine output. The normalized cannabinoid concentration can be used to monitor compliance with drug treatment programs. Serial determinations should be done at two- to three-day intervals. A 50% increase over the previous result is strong indication of continued marijuana use.
Specimen Requirements
Specimen
Urine (random)
Volume
5 mL
Minimum Volume
1.4 mL
Container
Plastic transport tube or plastic urine container
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Storage Instructions
Room temperature
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 070409 | Cannabinoid/Creatinine Ratio | 070410 | Cannabinoids Quant, Urine | ng/mL | 19073-6 | |
| 070409 | Cannabinoid/Creatinine Ratio | 075003 | Creatinine, Urine | mg/mL | 2161-8 | |
| 070409 | Cannabinoid/Creatinine Ratio | 075004 | Cannab/Crt Ratio | ng/mg creat | 13478-3 | |
| Order Code | 070409 | |||||
| Order Code Name | Cannabinoid/Creatinine Ratio | |||||
| Order Loinc | ||||||
| Result Code | 070410 | |||||
| Result Code Name | Cannabinoids Quant, Urine | |||||
| UofM | ng/mL | |||||
| Result LOINC | 19073-6 | |||||
| Order Code | 070409 | |||||
| Order Code Name | Cannabinoid/Creatinine Ratio | |||||
| Order Loinc | ||||||
| Result Code | 075003 | |||||
| Result Code Name | Creatinine, Urine | |||||
| UofM | mg/mL | |||||
| Result LOINC | 2161-8 | |||||
| Order Code | 070409 | |||||
| Order Code Name | Cannabinoid/Creatinine Ratio | |||||
| Order Loinc | ||||||
| Result Code | 075004 | |||||
| Result Code Name | Cannab/Crt Ratio | |||||
| UofM | ng/mg creat | |||||
| Result LOINC | 13478-3 |