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HelpTest Code PTHIO Intraoperative Parathyroid Hormone (IOPTH)
Laboratory Code
LAB5269
Specimen Requirements
Specimen Type: Whole Blood
Container/Tube: Purple Top (EDTA)
Volume: 3.0 mL
Minimum Volume: 3.0 mL blood
Collection Instructions: Fast patient 10 - 12 hours before sample collection. Mix specimen well to avoid clotting. Send sample to laboratory immediately.
Specimen Stability
| Specimen Type | Plasma |
|---|---|
| Ambient | Not available |
| Refrigerate | 2 days |
| Frozen | 6 months |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Reference Interval
| Age | |
|---|---|
| 6 days – < 1 yr | 0.7 – 9.4 pmol/L |
| 1 – 8 yrs | 1.7 – 6.7 pmol/L |
| 9 – 16 yrs | 2.3 – 9.3 pmol/L |
| 17 – 18 yrs | 1.7 – 6.4 pmol/L |
| ≥ 19 yrs | 1.6 – 7.2 pmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Differential diagnosis of hyperparathyroidism, hypoparathyroidism, or hypercalcemia of malignancy. Assess the cure or the need for further exploration during parathyroid adenoma surgery and to determine extent of resection in patients with primary and secondary parathyroid hyperplasia.
Service Code
31885
LOINC Code Information
14866-8
Alias
PTHIO
Update
Last updated 11/03/2025