Ordering Recommendation

Evaluate the cause of an isolated prolonged PTT in a patient who is not currently bleeding.

Mnemonic

HIGH MOLE

Methodology

Clotting

Performed

Varies

Reported

5-14 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation

Do not draw from an arm with a heparin lock or heparinized catheter.

Collect

Light Blue (Sodium Citrate).

Specimen Preparation

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.

Storage/Transport Temperature

Frozen.

Unacceptable Conditions
Remarks
Stability

Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks

Reference Interval

By report

Interpretive Data



Compliance Category

Performed by non-ARUP Laboratory

Note

Hotline History

N/A

CPT Codes

85293

Components

Component Test Code* Component Chart Name LOINC
2007579 High Molecular Weight Kininogen (HMWK) 52754-9
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Fitzgerald Factor
High Molecular Weight Kininogen (HMWK), Activity

Esoterix Coagulation