Parathyroid Hormone, Intact - Intraoperative PTH

Sunquest Code:PTHOR  
Epic Code:LAB3700Epic Name:Parathormone Intact Intraoperative
Order Instructions:At FRH, must be scheduled 2-3 days before scheduled surgery. Call the main lab (952-892-2085).
Synonyms:Parathormone; PTH, Intact
Methodology:Chemiluminescent immunoassay
Turnaround Time:30 minutes
Special Instructions:At UMMC: OR must call Chemistry (273-3966) when specimen is drawn. OR will bring specimen directly to Acute Care Receiving.

Collection Instructions

Optimal Volume:3 mL
Minimum\Peds Volume:1.0 mL
Container:Purple (EDTA), St Johns/St Joseph/Woodwinds - Purple (EDTA)
Causes for Rejection:PTH is not stable in a red/black top tube.
Contraindications:Large doses of biotin (10 mg or more per day) may cause clinically significant interference in PTHI levels. If interference is suspected, it is strongly recommended that biotin is discontinued for at least one week prior to retesting.

Processing and Shipping

Specimen Processing:Give directly to Chemistry for processing.
Stability:Stability: Room temperature - 8 hours; refrigerated - 72 hours; frozen - 8 months.
Test Performed at or Referral Lab Chemistry  (UMMC-East Bank, Ridges, St. Joseph's, St. John's, Woodwinds)


Reference Range:18-80 pg/mL. A greater than 50% drop in PTH value 10 minutes post-resection indicates that all hypersecreting tissue has been removed.
Use:Confirmation of successful removal of hyperfunctioning parathyroid tissue.

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