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Alkaline Phosphatase, Plasma / Serum

Item Value
Approval req'd? No
Available Stat? Yes
Test code ALKP
Performed by Parnassus, Mission Bay & Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Spectrophotometric, kinetic
(aminomethyl propanol/nitrophenol phosphate)
Container type Gold top or Light Green top
Amount to Collect 1 mL blood Click here for Microdetermination info
Sample type Serum or plasma
Preferred volume 0.5 mL serum or plasma
Min. Volume 0.2 mL serum or plasma Click here for Microdetermination info
Units U/L
Normal range
Age Male Female
0-14 days 78-234 U/L 78-234 U/L
15 days - <1 year 116 - 442 U/L 116 - 442 U/L
1 - 9 years 134 - 315 U/L 134 - 315 U/L
10 - 12 years 122 - 393 U/L 122 - 393 U/L
13 - 14 years 110 - 441 U/L 55 - 240 U/L
15 - 16 years 78 - 312 U/L 48 - 111 U/L
17 - 18 years 52 - 141 U/L 43 - 83 U/L
≥19 years 31 - 95 U/L 31 - 95 U/L



Note:
1. Normal range for children and adolescents <19 years old adopted from CALIPER "Pediatric Reference Intervals": https://app3.ccb.sickkids.ca/caliper/calipersearch/5
2. Normal range for adults was determined by testing 271 male and female healthy blood donors at UCSF.
Synonyms Alk phos; AlkP; Alk Ptase
Stability Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week
Turn around times STAT 1 hour, Routine 4 hours
Additional information Alkaline phosphatase isoenzymes are unreliable; use GGT to distinguish bone from liver enzyme if the source of elevation is unclear.
CPT coding 84075
LOINC code 6768-6
Last Updated 1/9/2018 6:05:41 PM
Entry Number 225
Lab Procedure Link Click here for Procedure
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