Parathyroid Hormone, Intact

Alternative Names/Synonyms	Parathyrin, PTH
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	PTHS3, PTHP3

Clinical Significance (If applicable)

Assting in the diagnosis of hyperparathyroidism, hypoparathyroidism, hypercalcemia, and hypocalcemia.

Intraoperative PTH is a specialized use for surgical decision making during parathyroidectomy.

Specimen Requirements (Sample Type)

Serum, Plasma

Specimen Requirements (Volume (mL))

0.5 mL

Specimen Requirements (Tube Type)

Serum (Gold SST)
Plasma (Lavender Tube preferred) Collection Containers – Tube Types

Draw (mL)

4.5 mL

Collection Requirements

Do not use Light Green PST containing lithium heparin.
Collection Instructions

Sample Stability

Room Temperature: 2 days

Fridge: 3 days @ 2-8°C

Freezer: 6 months @ -20°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas e 602, immunoassay

Test Availability

24 hours a day, 7 days a week

STAT Turnaround Time

1 hour

Routine Turnaround Time

3 hours

Reference Ranges

1.6 - 6.9 pmol/L
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688

Ordering Practices

For intraoperative PTH, the core laboratory should be notified in advance with confirmation of testing availability on the day of surgery before proceeding.