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Test Code PTH PRO Parathyroid Hormone (PTH), Intact, with Phosphorus and Calcium, Serum

Methodology

Electrochemiluminescence Immunoassay Sandwich Assay

Note:  Concomitant calcium and phosphorus determinations will be performed. Primary test for hyperparathyroidism, secondary hyperparathyroidism, or hypoparathyroidism.

Performing Laboratory

Decatur Morgan Hospital-Decatur Campus

Specimen Requirements

Draw blood in a plain, red-top tube(s) or a serum gel tube(s). Spin down and send 2 mL (pediatric:  1 mL) of serum.

Note:  For screening purposes, it is recommended that specimen be drawn from a fasting patient.

Reference Values

PTH, INTACT
16-65 pg/mL

CALCIUM
0-6 days:  7.2-12.0 mg/dL
7 days-2 years:  9.0-11.0 mg/dL

>2 years:  8.8-10.2 mg/dL
Critical values (automatic call-back):  <6.5 mg/dL or >12.0 mg/dL
PHOSPHORUS INORGANIC (PO4)
0-6 days:  4.0-9.0 mg/dL
7 days-2 years:  4.0-8.0 mg/dL
3-12 years:  3.0-6.0 mg/dL
>12 years:  2.7-4.5 mg/dL
Critical value (automatic call-back):  <1.0 mg/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

82310 - calcium
83970 - PTH
84100 - phosphorus