ARUP's Laboratory Test Directory

Thyroid Releasing Hormone (TRH) Stimulation of Prolactin, 60 Minutes : 0070118

Mnemonic: PROLAC 60

Methodology: Quantitative Chemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Serum separator tube or plasma separator tube. Also acceptable: Green (sodium or lithium heparin). Collect separate tube for each timed specimen.

Specimen Preparation: Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma per timed specimen to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Unacceptable Conditions: EDTA plasma.

Stability (collection to initiation of testing): After separation of cells: Ambient: 8 hours; Refrigerated: 48 hours; Frozen: 3 months
Reference Interval:
By report
Interpretive Data: Failure of prolactin concentrations to double in response to TRH in patients with low or undetectable baseline concentrations of prolactin suggests pituitary destruction or ablation.  In contrast, patients with hypothalamic disease usually respond to TRH, but the response may be delayed compared to normal persons.
CPT Code(s): 84146
Cross References: Prolactin (TRH) (Thyroid Releasing Hormone (TRH) Stimulation of Prolactin, 60 Minutes)
 
 

 

 

 
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