Pathology Handbook

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Laboratory:

Clinical Biochemistry

Test Code:

Specimen Types:

Serum
Plasma

Container Types:

SST
Lithium Heparin (with Gel)

Collection & Request Instructions:

Stasis must be avoided when taking blood as prolonged use of a torniquet gives falsely high values, as does haemolysis.

Transport Instructions between Sites and/or Laboratories:

Room Temperature

Additional Notes:

Reference Interval (Adults 19 yrs +):

2.10—2.60 mmol/L

Source:

RCPA/AACB Harmonised Reference Intervals from 13/7/2015.

Serum total calcium rises or falls approximately
0.018 mmol/L for each g/L change in serum albumin.

Corrected calcium (CCA) will be automatically calculated when serum albumin is also requested.

CCA = Calcium Lvl+(40-Albumin Lvl)*0.018

Age Related Reference Intervals:

< 1 yrs 2.13- 2.75 mmol/L

1 yr - < 19 yrs 2.3-2.63 mmol/L