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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Calcium (REFL)
Test Code16458
Includes
This is a client specific reflex test. Reflex criteria has been pre-defined by the ordering physician. Additional testing will be performed at an additional charge.
Preferred Specimen
Red Top
Minimum Volume
0.5 mL
Other Acceptable Specimens
Sodium heparin (green-top) tube • Lithium heparin (green-top) tube
Transport Container
Serum separator tube (SST)
Transport Temperature
Room temperature
Specimen Stability
Serum and Plasma
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Anticoagulants other than heparin
Methodology
Spectrophotometry (SP)
Reference Range
| Male | Female | |
| <1 month: | 8.4-10.6 | 8.4-10.6 |
| 1-11 months: | 8.7-10.5 | 8.7-10.5 |
| 1-3 years: | 8.5-10.6 | 8.5-10.6 |
| 4-19 years: | 8.9-10.4 | 8.9-10.4 |
| 20-49 years: | 8.6-10.3 | 8.6-10.2 |
| >49 years: | 8.6-10.3 | 8.6-10.4 |
Clinical Significance
Serum calcium is involved in the regulation of neuromuscular and enzyme activity, bone metabolism and blood coagulation. Calcium blood levels are controlled by a complex interaction of parathyroid hormone, vitamin D, calcitonin and adrenal cortical steroids. Calcium measurements are useful in the diagnosis of parathyroid disease, some bone disorders and chronic renal disease. A low level of calcium may result in tetany.
