Test Details
Methodology
Cobas® AmpliPrep/Cobas® TaqMan® HIV-1 Test, Version 2.0
Result Turnaround Time
17 - 25 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.
Use
Detect and quantitate HIV-1 in plasma with reflex to phenotype (at additional charge) if viral load is >500 copies/mL. Test determines virus resistance to antiretroviral drugs.
Limitations
Assay range: 20−10,000,000 copies/mL
Specimen Requirements
Specimen
Plasma, frozen
Volume
6 mL
Minimum Volume
4 mL (Note: This volume does not allow for repeat testing.)
Container
Ship in two or more screw-cap polypropylene frozen transport tubes.
Collection Instructions
Collect specimen in three lavender-top (EDTA) tubes or three PPT™ tubes. Do not use green-top (heparin) tubes. Centrifuge specimen within six hours of collection. Remove plasma, transfer plasma to screw-cap polypropylene transport tubes (not "pop-top" or "snap-cap"), and freeze. Ship frozen (preferred). Do not ship frozen in PPT™. If PPT™ is used to collect plasma, specimen must be transferred to screw-cap tubes prior to freezing to avoid false elevation of low viral load samples. To avoid delays in turnaround time when requesting multiple tests on frozen samples, please submit separate frozen specimens for each test requested.
Storage Instructions
Freeze. Separate frozen sample required for PhenoSense® portion of the test. Frozen sample is preferred for the viral load assay but is also stable at room temperature for one day or refrigerated for five days. Freeze for long-term storage.
Causes for Rejection
Hemolysis; green-top (heparin) tube; specimen received in "pop-top" or "snap-cap" tube; quantity not sufficient for analysis; frozen PPT™
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 550470 | RNA, PCR (NonGraph) rfx/PS | 20447-9 | 550445 | HIV-1 RNA by PCR | copies/mL | 20447-9 |
| 550470 | RNA, PCR (NonGraph) rfx/PS | 20447-9 | 550446 | log10 HIV-1 RNA | log10copy/mL | 29541-0 |
| 550470 | RNA, PCR (NonGraph) rfx/PS | 20447-9 | 550464 | PhenoSense(R) | N/A | |
| Order Code | 550470 | |||||
| Order Code Name | RNA, PCR (NonGraph) rfx/PS | |||||
| Order Loinc | 20447-9 | |||||
| Result Code | 550445 | |||||
| Result Code Name | HIV-1 RNA by PCR | |||||
| UofM | copies/mL | |||||
| Result LOINC | 20447-9 | |||||
| Order Code | 550470 | |||||
| Order Code Name | RNA, PCR (NonGraph) rfx/PS | |||||
| Order Loinc | 20447-9 | |||||
| Result Code | 550446 | |||||
| Result Code Name | log10 HIV-1 RNA | |||||
| UofM | log10copy/mL | |||||
| Result LOINC | 29541-0 | |||||
| Order Code | 550470 | |||||
| Order Code Name | RNA, PCR (NonGraph) rfx/PS | |||||
| Order Loinc | 20447-9 | |||||
| Result Code | 550464 | |||||
| Result Code Name | PhenoSense(R) | |||||
| UofM | ||||||
| Result LOINC | N/A |
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
|---|---|---|---|---|---|---|
| Reflex 1 | 551120 | Reflex to PhenoSense(R) | 551503 | PhenoSense(R) PDF | 45182-3 | |
| Reflex 1 | ||||||
| Order Code | 551120 | |||||
| Order Name | Reflex to PhenoSense(R) | |||||
| Result Code | 551503 | |||||
| Result Name | PhenoSense(R) PDF | |||||
| UofM | ||||||
| Result LOINC | 45182-3 | |||||
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
|---|---|---|---|---|---|---|
| Reflex 1 | 551120 | Reflex to PhenoSense(R) | 551801 | PhenoSense(R) | 49665-3 | |
| Reflex 1 | ||||||
| Order Code | 551120 | |||||
| Order Name | Reflex to PhenoSense(R) | |||||
| Result Code | 551801 | |||||
| Result Name | PhenoSense(R) | |||||
| UofM | ||||||
| Result LOINC | 49665-3 | |||||
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
|---|---|---|---|---|---|---|
| Reflex 1 | 551120 | Reflex to PhenoSense(R) | 551504 | PhenoSense(R) Interpretation | 48767-8 | |
| Reflex 1 | ||||||
| Order Code | 551120 | |||||
| Order Name | Reflex to PhenoSense(R) | |||||
| Result Code | 551504 | |||||
| Result Name | PhenoSense(R) Interpretation | |||||
| UofM | ||||||
| Result LOINC | 48767-8 | |||||