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Alkaline Phosphatase Isoenzymes, CSF
2005736
Ordering Recommendation

Alkaline phosphatase may be increased in the CSF of patients with intracranial germ cell tumors. When increased, isoenzyme testing can identify if a heat-stable isoenzyme (ie, germ cell or placental) is present but cannot quantify the amount of activity.

Mnemonic
CSF ALKP I
Methodology
Quantitative Heat Inactivation/Enzymatic
Performed
Sun-Sat
Reported
1-3 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
 
Collect
CSF. 
Specimen Preparation
Transfer 2 mL CSF to an ARUP Standard Transport Tube and refrigerate or freeze ASAP or within 2 hours. (Min: 1 mL) 
Storage/Transport Temperature
Refrigerated or frozen. 
Unacceptable Conditions
Specimens collected in EDTA, potassium oxalate, sodium citrate, or sodium fluoride. Grossly hemolyzed or lipemic specimens 
Remarks
 
Stability
After separation from cells: Ambient: 2 hours; Refrigerated: 1 week; Frozen: 1 month 
Reference Interval
Effective January 17, 2012

Total Alkaline Phosphatase: 0-1 U/L
Interpretive Data


Compliance Statement B: This test was developed and its performance characteristics determined by ARUP Laboratories. The U.S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Components
Component Test Code*Component Chart NameLOINC
2005737CSF Alkaline Phosphatase Total
2005738CSF Alk Phos Bone Calc
2005739CSF Alk Phos Liver Calc
2005740CSF Alk Phos Other Calc
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • ALK PHOS
  • Alkaline Phosphatase
  • Alkp