Factor VIII Inhibitor

LOINC codes: 3209-4, 58493-8
Tests that measure Factor VIII Inhibitor: Quest Diagnostics 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, Factor VIII Inhibitor Panel 40083

Population	Interval
Factor VIII Inhibitor, Chromogenic Screen	Negative
Factor VIII Activity, Clotting	50-180 % normal

Quest Diagnostics test catalog, 40083

Tests

Check the catalog code, specimen, method and preparation for every test that measures Factor VIII Inhibitor. Select up to five tests to compare them side by side.

Quest Diagnostics 1 test

Panels that include this biomarker

Factor VIII Inhibitor Panel 40083
4 analytes · Plasma · Fasting not stated
Method and collection
Method
Chromogenic • Photometric Clot Detection
Collection
Submit a total of 4 mL (2 mL in each of 2 tubes). Centrifuge light blue-top tube 15 minutes at approximately 1500 g within 60 minutes of collection. Using a plastic pipette, remove plasma, taking care to avoid the WBC/platelet buffy layer and place into a plastic vial. Centrifuge a second time and transfer platelet-poor plasma into a new plastic vial. Plasma must be free of platelets (<10,000/mcl). Freeze immediately and ship on dry ice. Note: Storage of whole blood at refrigerated temperatures prior to processing may lead to cryoprecipitate formation and falsely low Factor VIII and von Willebrand Factor studies.
Quest Diagnostics catalog page

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Sources

Quest Diagnostics test catalog
1 test: codes, specimens, methods, preparation and reference intervals.
LOINC 3209-4, 58493-8
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for Factor VIII Inhibitor
Registered studies that measure Factor VIII Inhibitor, on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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