Skip to main content

Please note that this is a beta version of our website. Should you encounter any bugs, glitches, lack of functionality or other problems on the website, please let us know immediately so we can rectify these accordingly. Your help in this regard is greatly appreciated! You can email us.

Login to North West London Pathology – consumables service

If you need a new account or you have a query about your order, please telephone the pathology call centre on 0203 313 5353.

If you have forgotten your password you can reset this yourself. Please click here if you have forgotten your password.

Results Line and Enquiries

0203 313 5353

Calcium (blood)

Category Biochemistry
Test background

The majority of body calcium is bone-associated and circulating levels reflect bone turnover and disease. Circulating calcium is under the control of parathyroid hormone. The parathyroid gland mediates increased serum calcium as a function of PTH production. Primary hyperparathyroidism reflects adenoma/carcinoma or hyperplastic syndromes, leading to excess serum calcium as a function of bone mineralisation and increased renal reabsorption/intestinal uptake. Secondary forms typically reflect renal failure.

Clinicial Indications

Increased calcium and reduced phosphate typically reflects primary hyperparathyroidism, while raised phosphate is seen in secondary forms Raised calcium is seen in osteomalacia, osteoporosis, Paget’s disease and osteolytic lesions secondary to bone metastasis Reduced serum calcium is associated with hypomagnesaemia, rickets and vitamin D deficiency Diagnosis and assessment of recurrent urolithiasis patients in addition to monitoring the effectiveness of thiazide therapy to lessen calciuria in known stone formers

Reference range

 

Less than 1 month 2.0-2.7 mmol/L
1 month-16 years 2.2-2.7 mmol/L
Greater than 16 years 2.20-2.60 mmol/L
Sample & container required SST (gold top)
Sample volume 0.5 mL
Turnaround time 1 day