Leukocyte Alkaline Phosphatase : ARUP Lab Tests

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0049000: Leukocyte Alkaline Phosphatase

Anatomic Pathology Test Request Form Recommended

Test Mnemonic: LAP
Methodology: Cytochemical Stain Performed: Mon-Fri Reported: 1-5 days

Specimen Required:

Collect: One 5 mL whole blood, green (sodium or lithium heparin) and six unfixed, well-prepared smears.

Transport: 5 mL whole blood and six unfixed, well-prepared smears. Transport at 20-25°C. Send Sunday through Thursday only.

Pediatric Collection/Transport: 1 mL whole blood and six unfixed, well-prepared smears at 20-25°C. Send Sunday through Thursday only.

Remarks: Whole blood must be received within 24 hours of collection. When only unfixed smears are submitted, the slides must be received within 72 hours preparation. Protect from light and pack accordingly to avoid breakage.

Unacceptable Conditions: Specimens collected in EDTA. Poorly prepared smears (too thick or no feather edge). Broken smears. Fixed smears.

Stability: Blood: Ambient: 24 hours; Smears (unfixed): Ambient: 3 days

Reference Interval:

Female: 33-149 (no units)
Male: 22-124 (no units)

CPT Code(s):
85540

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