Test Details
Methodology
Electrochemiluminescence (ECL)
Result Turnaround Time
5 - 10 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.
Limitations
The PTH-rP assay should not be used to exclude cancer or screen tumor patients for humoral hypercalcemia of malignancy (HHM). The results should always be assessed in conjunction with the patient's medical history, clinical examination, and other findings. If test results are clinically discordant, please contact the laboratory.
Specimen Requirements
Specimen
Plasma, frozen; plasma with aprotinin (Trasylol®), (Trasylol® acceptable, not required)
Volume
1 mL
Minimum Volume
0.5 mL (Note: This volume does not allow for repeat testing.)
Container
Lavender-top (EDTA) tube
Collection Instructions
Collect into chilled or prefrozen plastic lavender-top (EDTA) tube, noting the time of collection. After venipuncture, immediately invert tube several times to ensure complete mixture. Separate plasma from cells by centrifugation. Separate plasma into a plastic vial, and freeze within 15 minutes of collection. To avoid delays in turnaround time when requesting multiple test on frozen sample, please submit separate frozen specimens for each test requested.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 4 hours |
Refrigerated | 4 hours |
Frozen | 1 month |
Freeze/thaw cycles | Stable x6 |
Storage Instructions
Freeze.
Causes for Rejection
Specimen received at room temperature
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 503380 | PTHrP (PTH-Related Peptide) | 15087-0 | 503381 | PTHrP (PTH-Related Peptide) | pmol/L | 15087-0 |
| Order Code | 503380 | |||||
| Order Code Name | PTHrP (PTH-Related Peptide) | |||||
| Order Loinc | 15087-0 | |||||
| Result Code | 503381 | |||||
| Result Code Name | PTHrP (PTH-Related Peptide) | |||||
| UofM | pmol/L | |||||
| Result LOINC | 15087-0 |