Parathyroid Hormone-Related Peptide by LC-MS/MS, Plasma PTHREP
| Method(s) | Quantitative High Performance Liquid Chromatography - Tandem Mass Spectrometry |
|---|---|
| Specimen Required | |
| Collect | Protease Inhibitor tube. |
| Transport | 1.5 mL plasma. (Min: 0.7 mL) |
| Remarks | A butterfly collection set must be used. NOT RECOMMENDED: Filling collection tubes directly through a needle/tube-holder assembly increases the risk of chemical reflux back into the vein of the patient. Mix collection tube thoroughly. Separate the plasma from cells within 1 hour of collection by centrifugation. |
| Stability | After separation from cells: Ambient: Unacceptable; Refrigerated: Unacceptable; Frozen: 3 months |
| Unacceptable Conditions | Grossly hemolyzed specimens. |
| Schedule | Sun, Wed, Fri |
| Billing Code | 5011490 |
| CPTCode | 82542 |
| Notes | Amino (N)- and carboxy (C)-terminus PTHrP fragments, such as those produced by some patients with renal insufficiency, do not interfere with this assay. |
| Preferred Specimen Collection Device(s) | |
