Leukocyte Alkaline Phosphatase
Label Mnemonic: LAP
Epic Lab Code: LAB1100
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Whole Blood
Collection Medium:
Green top tube 4 mL (Na Heparin)
Minimum:
Preferred Minimum: 5 mL whole blood from green top tube AND six unfixed, well-prepared smears (smears to be prepared by lab).
Absolute Minimum: 1 mL whole blood from green top tube AND six unfixed, well-prepared smears (smears to be prepared by lab).
Rejection Criteria:
Specimen must be received at reference laboratory within 24 hours of collection; do not collect on Fridays, holidays, day before a holiday, or weekends; specimens collected in EDTA tubes, poorly prepared smears (too thick or no feather edge). Broken or fixed smears. Specimens that have been spun. Smears made from anything other than heparin. Smears made from blood older than 24 hours. Whole blood not protected from light. Smears not protected from light.
Delivery Instructions:
Deliver to laboratory immediately after collection.
Turn Around Time:
1-5 days upon receipt at reference laboratory
Reference Range:
Female: 33-149 (no units)
Male: 22-124 (no units)
Comments:
PLEASE NOTE: ALL slides will be prepared by the Core laboratory staff from the green top (Na or Lithium Heparin) tube submitted for the reference laboratory.

When only unfixed smears are submitted, the slides must be received within 72 hours of preparation; protect from light and pack accordingly to avoid breakage.
Methodology:
Cytochemical Stain
CPT Code:
85540