PTH, BioIntact (Amino Acids 1-84) and Calcium
Order Name
PTH BIOINT
Test Number: 3621490
Revision Date 12/21/2012
Test Number: 3621490
Revision Date 12/21/2012
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
PTH, BioIntact (Amino Acids 1-84) and Calcium
|
Chemiluminescence Assay |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 2 mL (1) | Serum | Clot Activator SST | Frozen |
| Alternate 1 | 2 mL (1) | Plasma | Sodium Heparin (Green Top / No-Gel) | Frozen |
| Instructions | Spin and separate serum or plasma immediately and transfer to plastic transport tube and Freeze. Whole blood is unacceptable. Serum must be sent frozen. Stabilities: Heparin Plasma: Frozen= 4 months Serum: Frozen= 4 months. For best comparison with reference range, a fasting morning specimen should be obtained. Otherwise, no other preparation is required. | |||
| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Tues, Fri |
| Expected TAT | 3-4 Days |
| Clinical Use | Measurement of PTH and its use in patient management is often complicated by the presence of inactive PTH fragments in blood. Although clinically useful, most commercially available PTH assays have limitations including a lack of specificity for the immediate N-terminal region of the PTH molecule. Also, in addition to measuring levels of the entire hormone (an 84 amino acid chain), these assays measure various mid-molecule and C-terminal PTH fragments with limited or no biological activity. |
| CPT Code(s) | 83970; 82310 |
| Lab Section | Reference Lab |