Parathyroid Hormone-related Peptide (PTH-rP) (Endocrine Sciences)

TEST: 503380
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CPT: 82397
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Synonyms

  • Parathyroid Hormone-related Protein
  • PTHrp

Expected Turnaround Time

5 - 10 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Documents

Specimen Requirements

Specimen

Plasma, frozen; plasma with aprotinin (Trasylol®), (Trasylol® acceptable, not required)

Volume

1 mL

Minimum Volume

0.5 mL (Note: This volume does not allow for repeat testing.)

Container

Lavender-top (EDTA) tube

Collection

Collect into chilled or prefrozen plastic lavender-top (EDTA) tube, noting the time of collection. After venipuncture, immediately invert tube several times to ensure complete mixture. Separate plasma from cells by centrifugation. Separate plasma into a plastic vial, and freeze within 15 minutes of collection. To avoid delays in turnaround time when requesting multiple test on frozen sample, please submit separate frozen specimens for each test requested.

Storage Instructions

Freeze.

Stability Requirements

Temperature

Period

Room temperature

4 hours

Refrigerated

4 hours

Frozen

1 month

Freeze/thaw cycles

Stable x6

Causes for Rejection

Specimen received at room temperature

Test Details

Limitations

The PTH-rP assay should not be used to exclude cancer or screen tumor patients for humoral hypercalcemia of malignancy (HHM). The results should always be assessed in conjunction with the patient's medical history, clinical examination, and other findings. If test results are clinically discordant, please contact the laboratory.

Methodology

Electrochemiluminescence (ECL)

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
503380 PTHrP (PTH-Related Peptide) 15087-0 503381 PTHrP (PTH-Related Peptide) pmol/L 15087-0