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Test Code PROLAC Prolactin,LAB531

Performing Laboratory

St. Luke's Hospital Laboratory

Specimen Requirements

Serum

Container/Tube: Gold-top serum gel tube or plain, red-top tube

Specimen: 0.5 mL of serum

 

Stability:

  • Room temperature:  8 hours
  • Refrigeration (2°- 8°C):  48 hours
  • Frozen (≤ -20°C): Undetermined.  Freeze samples only once and mix thoroughly after thawing.

 

Transport Temperature: Refrigerated

Reference Values

 

Females

 

Nonpregnant

2.8–29.2  ng/mL

Pregnant

9.7–208.5 ng/mL

Postmenopausal

1.8–20.3 ng/mL

Males

2.1–17.7 ng/mL

 

Useful For

Consistently elevated serum prolactin levels greater than 30 ng/mL in the absence of pregnancy and postpartum lactation are indicative of hyperprolactinemia, which is the most common hypothalamic-pituitary dysfunction encountered in clinical endocrinology.  Hyperprolactinemia often results in galactorrhea, amenorrhea, and infertility in females, and in impotence and hypogonadism in males. Renal failure, hypothyroidism, and prolactin secreting pituitary adenomas are also common causes of abnormally elevated prolactin levels.

Day(s) Test Set Up

Tuesday and Friday

STAT testing available Monday through Friday, day shift only

Methodology

Immunoenzymatic Chemiluminescent Assay

Test Classification and CPT Coding

84146