PTH infusion test

Last reviewed 01/2018

This test consists of infusing the subject with parathyroid hormone and measuring urinary phosphate and cAMP.

Using this test the two types of pseudohypoparathyroidism can be distinguished:

  • type I:
    • cAMP levels do not rise
    • phosphate levels do not rise

  • type II:
    • cAMP levels do rise
    • phosphate levels do not rise