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Immature Platelet Fraction (part of Hematology reflex orders, not separately orderable)
MessagePerformed in Hematology
Test Code
# IPF
Preferred Specimen
3.0 lavender EDTA whole blood
Minimum Volume
1.5 mL
Instructions
Gently invert tube 8-10 times immediately after drawing to prevent clotting
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Clotted
Drawn in expired tube
Hemolyzed, icteric or lipemic
Contaminated
Drawn in expired tube
Hemolyzed, icteric or lipemic
Contaminated
Setup Schedule
Monday through Sunday; Continuously
Report Available
Daily, Less than 4 hours.
Reference Range
Refer to the Reference Range documents at this link Downtime.
For NOCO facilities, refer to the Hematology Reference Range document in the Resources on the Test Catalog home page.
For NOCO facilities, refer to the Hematology Reference Range document in the Resources on the Test Catalog home page.
Clinical Significance
Low platelets with low IPF suggests a bone marrow production disorder. Low platelets with high IPF suggests peripheral destruction (ITP, TTP, DIC, autoimmune) or bone marrow recovery. Trending of serial IPF measurements is recommended when evaluating for bone marrow response.
Last Updated: August 19, 2026
