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Primary Name Fletcher Factor Assay
Synonym Prekallikrein assay
Synonym --
Contraction PK assay
Contraction --
Contraction --
UAB Procedure Number 2500550
CPT Code 85292
Specimen Collect one (1) blue-stopper tube (3.2% sodium citrate), filled to specified volume. Do not underfill or overfill.

Specimen Management Centrifuge blue-stopper tube within one (1) hour of collection, separate plasma and test or quick-freeze at -70°C.
Specimen Accepted Daily including weekends. Specimens from outside UAB Hospital will not be sent out to reference laboratories.
Test Performed Test performed by reference laboratory.
Available Stat? No.
Description Fletcher factor deficiency accounts for a prolonged activated partial thromboplastin time test (APTT) result. However, the deficiency has no clinical consequences.
Reference Interval 65-135%
Critical Value --
Therapeutic Range --
Follow-up Test --
Associated With --

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