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
Hotline History
Date of Change
Test Name Change
Methodology
Performance/Reported Schedule
Specimen Requirements
Reference Interval
Interpretive Data
Note
CPT Code
Component Change
Other Interface Change
New Test
Inactive
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