Test Overview
Test Methodology

HPLC

Test Usage

Sometimes used in the differential diagnosis of hypercalcemia as urinary cyclic AMP excretion is generally elevated in primary hyperparathyroidism. Can also be useful as an adjunct to serum parathyroid hormone measurements, especially in the diagnosis of parathyroid hormone resistance states, such as pseudohypoparathyroidism.

Reference Range *

1.3 - 3.7 nmol/dL of glomerular filtrate

Test Limitations

Parathyroid suppression (hypoparathyroidism) does not lower urinary cyclic AMP excretion to definately subnormal values.

Test Details
Days Set Up
Wednesday
Analytic Time

3 - 10 days

Soft Order Code
CARU
MiChart Code
Cyclic AMP, Urine
Synonyms
  • AMP, Cyclic
  • CYCLIC AMP, URINARY EXCRETION
  • C-CREAT
  • C-CREATU
  • CYCLIC AMP
  • CREATININE, SERUM
  • CREATININE, URINE
Laboratory
Sendout
Reference Laboratory
Mayo CARU
Section
Special Testing
Specimen Requirements
Collection Instructions

Both serum and urine are required for this test. Serum must be obtained at time of urine collection. Collect serum in red top or SST tube. Centrifuge, aliquot serum into a plastic container and refrigerate. Collect random urine and freeze.

Yellow Top Tube
Normal Volume
Serum: 1 mL, Urine: 15 mL
Minimum Volume
Serum: 0.5 mL, Urine: 5.5 mL
Additional Information

Test sent to Mayo Medical Laboratories

Billing
CPT Code
82030
Fee Code
23344
NY State Approved
No