PTH is the major hormone involved in calcium homeostasis, and should always be interpreted alongside a concomitant serum calcium result.
Tube
04 (EP) – EDTA Plasma
ID
Tests&Tubes0089
Additional Information
PTH has a marked diurnal rhythm with a nadir at 10-11am. If hyperparathyroidism is suspected, we suggest that samples are taken in the mid-morning. Raised levels of PTH in the setting of hypercalcaemia are indicative of primary or tertiary hyperparathyroidism. Symptoms of hyperparathyroidism include “bones” (increased turnover), “groans” (abdominal) and “stones” (renal). Note familial hypocalciuric hypercalcaemia (FHH) can cause diagnostic problems, as PTH may also be raised in this disorder. The two conditions can be differentiated by measuring calcium in a 24 hour urine sample. A normal or unmeasurable PTH in a patient with hypocalcaemia is suggestive of hypoparathyroidism.
Turn Around
A&E: N/A
Day Case: N/A
In-Patient: 24 Hours
Out-Patient: 24 Hours
GP: 72 Hours
Send to
Blood Sciences Cross Site
Contact
For further details please contact ĢtvƵ Pathology customer services: [email protected].
Collection Con
IMPORTANT Serum tube also required for Calcium.
Minimum volume – 250µl serum / plasma
Instructions for Lab Staff: Standard lab processing- No special requirements.
Sample REQ
Blood.
Units
pmol/L