Evaluate the cause of an isolated prolonged PTT in a patient who is not currently bleeding.
New York DOH Approval Status
Do not draw from an arm with a heparin lock or heparinized catheter.
Light Blue (Sodium Citrate).
Transfer 2 mL plasma to an ARUP Standard Transport Tube. (Min: 1 mL)
Test is not performed at ARUP; separate specimens must be submitted when multiple tests are ordered.
Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
Performed by non-ARUP Laboratory
|Component Test Code*||Component Chart Name||LOINC|
|2007579||High Molecular Weight Kininogen (HMWK)||52754-9|
- Fitzgerald Factor