Laboratory Test Information Guide

Details for Alkaline Phosphatase, Plasma

Test Name: Alkaline Phosphatase, Plasma
Alternate Name(s):  
Laboratory: Core
Specimen Type: 4.5 mL Green (Lithium Heparin) top Vacutainer tube

0-2 years: Green 0.5 mL Microtainer
2-10 years: 2 mL Green top
Collection Information: Serum from a 5 mL Gold top or 6 mL Red top Vacutainer tube is also acceptable.
Test Schedule: As required
Turnaround time from when specimen
is received in testing laboratory:
4 hours
1 hour
Reference Range: Male & Female Children:

≤14 days:
83-248 U/L
15 days-1 year:
122-469 U/L
1-10 years:
142-335 U/L
10-13 years:
129-417 U/L

13-15 years:
116-468 U/L
15-17 years:
82-331 U/L
17-19 years:
55-149 U/L
>19 years:
40-130 U/L

13 years-15 years:
57-254 U/L
15-17 years:
50-117 U/L
17-19 years:
45-87 U/L
>19 years:
35-104 U/L
Effective Date: 2008-11-15
Revised Date: 2019-10-16
Critical Value:  
Interpretive Comments: Normally increased to 400 IU/L in children, adolescence and pregnancy. Abnormally elevated with increased osteoblastic activity (e.g. bone metastasis, Paget's disease of bone), in obstructive liver disease and in some carcinomas of the bronchus.
Patients with low alkaline phosphatase levels: A low level can occur in various medical conditions and may be a marker for hypophosphatasia, a now potentially treatable disorder of bone mineralization
Special Processing:  
Comments: Hemolysis is an interfering substance with this methodology.
Method of Analysis: Enzymatic rate
Critical Information Required:  
Storage & Shipment:  
System Codes: 
Referred To:  

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