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Calcium, Plasma, Serum, or Urine
Test Code304
CPT Codes
82310-Calcium, total (if appropriate); 82340-Calcium, urine (if appropriate)
Preferred Specimen
Submit only 1 of the following specimens:
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s) with no metal cap(s) or glued insert(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: Add 20 mL of 6N HCl at start of collection. If 24-hour volume is markedly decreased (<300 mL/24 hours), indicate exact volume of 6N HCl added.
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).
Plasma
Container/Tube: Green-top (heparin) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Urine
Container/Tube: Plastic urine container(s) with no metal cap(s) or glued insert(s)
Specimen Volume: 25 mL from a 24-hour urine collection
Collection Instructions: Add 20 mL of 6N HCl at start of collection. If 24-hour volume is markedly decreased (<300 mL/24 hours), indicate exact volume of 6N HCl added.
Note: 1. 24-Hour volume is required. 2. Follow instructions in Urine Collection in Special Instructions. 3. Indicate urine. 4. Label specimen appropriately (urine).
Minimum Volume
Pediatric volume: 0.2 mL
Transport Temperature
Refrigerate
Methodology
O-Cresolphthalein
Setup Schedule
Monday through Sunday
Reference Range
PLASMA OR SERUM
0-10 days: 7.6-10.4 mg/dL
>10 days-24 months: 9.0-11.0 mg/dL
>24 months: 8.5-10.1 mg/dL
Critical values (automatic call-back): <6.5 mg/dL or >12.0 mg/dL
URINE
42-353 mg/24 hours
0-10 days: 7.6-10.4 mg/dL
>10 days-24 months: 9.0-11.0 mg/dL
>24 months: 8.5-10.1 mg/dL
Critical values (automatic call-back): <6.5 mg/dL or >12.0 mg/dL
URINE
42-353 mg/24 hours
Performed By
CoxHealth
