PTH, Intact
Test Mnemonic
PTHI
CPT Codes
- 83970 - QTY (1)
LOINC ®
2731-8
Aliases
- Parathyroid Hormone Intact
Includes
- PTH Intact
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | EDTA (Lavender) | Centrifuge and refrigerate. | Centrifuge and transfer plasma into a CCL aliquot tube and refrigerate. |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Centrifuge and refrigerate. | Submit in original tube or aliquot specimen into CCL aliquot tube |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | Plasma: 2 days after separation from cells Serum: 8 hours after separation from cells |
| Refrigerated | Plasma: 3 days after separation from cells Serum: 2 days after separation from cells |
| Frozen | Plasma: 6 months after separation from cells Serum: 6 months after separation from cells |
Days Performed
Sun - Sat
Turnaround Time
24 hours
Methodology
| Name | Description |
|---|---|
| Electro Chemiluminescence Immunoassay (ECLIA) |
Reference Range
| PTH Intact | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 99 Years | Normal | 15 - 65 | pg/mL |
Special Info
Note that serum specimens need to be spun immediately after the specimen clots. Patients taking a biotin dose of up to 5 mg/day should refrain from taking biotin for 4 hours prior to sample collection. Patients taking a biotin dose of 5 to 10 mg/day should refrain from taking biotin for 8 hours prior to sample collection. Patients taking a biotin dose > 10 mg/day should consult with their physician or the laboratory prior to having a sample taken. Clinicians should consider biotin interference as a source of error, when clinically suspicious of the laboratory result.