Methodology
Sysmex XN-3000/1000, Fluorescent Flow Cytometry with Platelet Specific Fluorescent Dyes
Synonyms
IFP, Reticulated Platelets
Specimen Type
Whole Blood
Performing Lab
Seattle Children's Laboratory
Epic ID
Other Reference Test
Lab Test Days
Daily
Standard TAT
1 Day
Collection Information
Specimen Required
1 to 3 mL blood
Container Type
Lavender EDTA
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-Only
Specimen Stability
Refrigerated=less than 48 hours
Rejection Criteria
Clotted or hemolyzed
Test Volume Required
3 mL blood
Minimum Test Volume
1 mL blood
Processing Instructions
Complete a Seattle Children's Laboratory requisition, Seattle test code LAB3210. Send Refrigerated overnight.
Comments
The immature platelet fraction (IPF) measures reticulated platelets in peripheral blood. IPF levels rise as bone marrow production of platelets increases. Its measurement provides an assessment of bone marrow platelet production.
CPT Codes
85055 (not genetic)
Revised
7/21/25