ARUP's Laboratory Test Directory

Bone Specific Alkaline Phosphatase : 0070053

Mnemonic: BSAP

Methodology: Quantitative Chemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Serum separator tube. Also acceptable: Green (sodium or lithium heparin).

Specimen Preparation: Transfer 0.5 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.3 mL)

Storage/Transport Temperature: Frozen

Unacceptable Conditions: Urine. Grossly hemolyzed specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: 2 hours; Refrigerated: 48 hours; Frozen: 2 months
Reference Interval:
Effective November 14, 2011
 
Age Male Female
6 months-2 years 31.6- 122.6  µg/L 33.4- 145.3 µg/L
3-6 years 31.3-103.4 µg/L 32.9-108.6 µg/L
7-9 years 48.6-140.4 µg/L 36.3-159.4 µg/L
10-12 years 48.8-155.5 µg/L 44.2-163.3 µg/L
13-15 years 27.8-210.9 µg/L 14.8-136.2 µg/L
16-17 years 15.3-126.8 µg/L 10.5-44.8 µg/L
18-24 years 10.0- 28.8 µg/L  
25 years and older 6.5-20.1 µg/L  
Premenopausal Female  4.5-16.9 µg/L
Postmenopausal Female  7.0-22.4 µg/L

Interpretive Data: Liver alkaline phosphatase can affect the measurement of bone specific alkaline phosphatase in this assay.  Each 100 U/L of liver alkaline phosphatase contributes an additional 2.5 to 5.8 µg/L to the bone specific alkaline phosphatase result.
CPT Code(s): 84080
Cross References: Alkaline Phosphatase (Bone Specific Alkaline Phosphatase)