Laboratory: Clinical Biochemistry
Test Name:
Test Code: ALK
Clinical Information:
Alkaline phosphatase levels are elevated during pregnancy due to placental alkaline phosphatase.  Values are 2 times normal in the third trimester.  
Collection Devices:
Specimen Required:

Plasma: 2.0 mL
Pediatric Plasma: 0.2 mL
Serum: 2.0 mL
Reference Values:
0 - 12 mo: 117 - 353 U/L                             
13 mo - 10 y:    70 - 258
11 - 16 y:    59 - 422
≥ 17 y:    30 - 120
Note:  Reference ranges are specific to instrumentation/site where testing performed.  For testing performed at different sites (other than WRHA & Westman Labs), please refer to the appropriate Lab Information Manual (LIM) entry.
In pregnant females 15 - 50 y:  twice normal in 3rd trimester.
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.  For further information please contact the metabolic geneticist on call through HSC paging (787-2071).
Stat or Routine
See Also:
More Information: