Test Name

Calcium

Test Code

202

Specimen

Serum

Unit

mg/dL

Station

Chemistry

Synonym Name/Abbreviation

Ca

CPT Code

82310

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Colorimetric assay

AML Preferred Tube

5 mL SST gel

Storage Instructions

Refrigerated.

Separate serum from cells within 45 minutes

Stability:

7 days at 15 to 25 ^oC

3 weeks at 2 to 8 ^oC

8 months at -15 to -25 ^oC.

Min. Volume

1 mL

Comments

In the differential diagnosis of hypercalcemia serum calcium
should be measured on at least three occasions. In any case of
hypercalcemia, it is desirable to measure magnesium and potassium
levels

Turn-Around-Time

One day

Intended Use

Diagnosis and monitoring of hypo and hypercalcemia,  parathyroid function, vitamin D
synthesis,  osteoporosis, or
increased intestinal absorption, gastrointestinal problems,
nephrolithiasis, polydipsia, polyuria, azotemia, multiple endocrine
adenomatosis, some cases of bone
metastasis.

Limitations

Sodium citrate, EDTA and NaF potassium oxalate interfere.

Measuring range: 0.8 to 20.1
mg/dL.

Patient Preparation

Morning fasting sample is desirable, since some
diurnal variation exists.

Reasons for Rejection

Gross hemolysis; EDTA, oxalate, or citrate anticoagulant;
improper labeling

Adult Reference Ranges

 8.5 to 10.5
mg/dL