Direct Xa Inhibitor Screen

General Information

Lab Name: Direct Xa Inhibitor Screen
Lab Code: DOXAS
Epic Name: Direct Xa Inhibitor Screen
Description: The DOAC screen is intended to rapidly identify patients who may be taking direct oral anticoagulants. This information may be useful in making decisions about performing surgery or treating with fibrinolytic agents. The thrombin time will detect direct thrombin inhibitors, while Direct Xa Inhibitor Screen will detect direct Xa inhibitors. Please contact the laboratory medicine resident on call if there are questions.
Synonyms: Anti 10A, Anti10A screen, AntiXa, Anti Xa, Anti-Xa screen, DOAC screen
Components

Method

Stago Clot-based Thrombin Time and STA Liquid Anti-Xa Chromogenic Assay

Reference Range

Female		Male
Age	Range	Age	Range
0-	No detectable direct Xa inhibitor [NODOAC]	0-	No detectable direct Xa inhibitor [NODOAC]

Effective date: 05/01/2019

Specimen Type: Citrated Whole Blood
Collection: 3 or 5 mL Citrated BLUE TOP tube
Handling Instructions: Specimen must be processed by Lab within 4 hours of collection.
Quantity: Requested: Entire sample
Minimum: 1.0 mL plasma

Receiving Instructions: Take specimen immediately to Coag Lab.

Outside labs: Centrifuge for 10 minutes, remove plasma and respin plasma for another 10 minutes. Decant and Freeze plasma (minimum 1.0 mL) at -20° to -80°C. Send frozen on ice.

Lab Department

Coagulation(COAG)

Frequency

Daily

Available STAT?

Yes

Performing Location(s)

HMC	Coagulation 206-520-4600 325 9th Ave, Rm # GWH-47, Seattle, WA 98104-2420
UW-NW	Main Lab 206-668-1344 UW Medical Center – Northwest 1550 N 115th Street, A200 Seattle, WA 98133
UW-MT	Coagulation 206-520-4600 Clinical Lab, Room NW220, University of Washington Medical Center, 1959 NE Pacific street, Seattle, WA 98195