Laboratory Test Guide

Direct Xa Inhibitor Screen

General Information

Lab Name

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

Interpretation

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

Ordering & Collection

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

Processing

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.

Performance

LIS Dept Code

Coagulation (COAG)

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

Frequency

Daily

Available STAT?

Yes

Billing & Coding

CPT codes

85130

LOINC

39556-6

Interfaced Order Code

UOW3664

Interfaced Result Code

UOW3664