Test Code PTHB Parathyroid Hormone, Intact

Important Note

This test may be affected by biotin interference. Patients on high dose biotin (5mg/day or more) should not have samples drawn until at least 24 hours after the last biotin administration.

Specimen and Container/Tube

Plasma

Rejection Criteria

Whole blood/unspun samples greater than 6 hours will be
rejected.

Turnaround Time

N/A

Specimen Type

Plasma

Preferred Volume

0.5 mL

Offsite Collection Instructions

1. Collect sample following standard collection methods
2. Within 2 hours of collection the sample must be spun and aliquoted
3. Transport refrigerated (2 – 8˚C)

UCMC Collection Instructions

1. Collect sample following standard collection methods
2. Within 2 hours of collection the sample must be received in Laboratory Service Center
3. Transport room temperature (15 – 25˚C)

STAT Turnaround Time

N/A

Test Usage

PTH can be useful in aiding the differential diagnosis of hypercalcemia and hypocalcemia.

Critical Results

N/A

Test Limitations

N/A

Additional Information

There is no high-dose hook effect at PTH concentrations up to
17,000 pg/mL.

Fee Code

30183970

Synonyms

N/A

Container/Tube

K₂EDTA , Lavendar Top

Specimen Minimum Volume

0.2 mL

Day(s) Performed

24 hours, 7 days a week including holidays.

STAT DAY(S) AND TIME(S) PERFORMED

N/A

CPT

83970

Method Name

Electrochemiluminescence immunoassay (ECLIA)

Reference Values

15 �?? 75 pg/mL

Test Includes

N/A

Reject Due To

Whole blood/unspun samples greater than 6 hours will be rejected.

Included in Additional codes

N/A

Coverage Information

N/A

Stability: Room Temp

2 days

Stability: Refrigerated

2 weeks

Stability: Frozen

4 weeks

Pediatric Volume