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Test Code SQ PTHIN, EPIC LAB108 Parathyroid Hormone (PTH), Intact, Plasma

Important Note

NEW INTERFERENCE CLAIM:

 

Patients receiving therapy with high biotin doses (i.e. > 5 mg/day), could cause a +/- 10% change in their PTH results. It is recommended by Roche that samples should not be drawn until at least 8 hours following the last biotin administration.

Methodology

Electrochemiluminescence

Note: If testing is for intraoperative PTH, call Meriter Laboratories at 608-417-6335 prior to the start of surgery.

Performing Laboratory

Meriter Laboratories

Specimen Requirements

Submit only 1 of the following specimens:

 

Preferred:

Specimen Type: Plasma

Collection Container/Tube: Lavender top (EDTA)

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions:

1. Spin down as soon as possible and aliquot plasma into a plastic vial.

2. If specimen cannot be centrifuged, send whole blood refrigerated within 4 hours.

3. Avoid hemolysis and lipemia.

4. Label specimen as plasma).

Additional Information: Specimen can not be shared with other whole blood testing (ie, CBC or A1C).

 

Alternate:

Specimen Type: Serum

Container/Tube: Red top or SST

Specimen Volume: 1 mL
Collection Instructions:

1. Centrifuge immediately after blood has clotted.

2. Label specimen as serum.

Specimen Transport Temperature

Plasma -Ambient 2 days/Refrigerate 3 days OK/Frozen OK

Whole Blood-Refrigerated 4 hours

Serum-Ambient 8 hours/Refrigerated 2 days OK/Frozen OK

Reference Values

15-65 pg/mL

Day(s) Test Set Up

Monday through Friday

Specimen Requirements Additional Information


Specimen Stability:EDTA plasma is stable at ambient temperature (15° C-25° C) for 2 days, refrigerated (2° C-8° C) for 3 days, and frozen (≤-20° C) for 6 month.

Serum is stable at ambient temperature (15° C-25° C) for 8 hours, refrigerated (2° C-8° C) for 2 days, and frozen (≤-20° C) for 6 month.

Test Classification and CPT Coding

83970