Alberta Precision Laboratories

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Organization:

Alberta Precision Laboratories

Message Alert:

PLEASE NOTE: This Test Directory is in an interim state and due to changes pertaining to the DynaLIFE transition, performing site for routing has not been updated. Please refer to Laboratory Information System for appropriate routing.

Test Name/Synonym:

Antithrombin Activity (Synonym AT3, AT3ACT, Anti-thrombin III, Anti-thrombin 3, ATACT)

Ordering Alert:

Use the instructions on this page when Antithrombin is the only test required. If testing is for Hereditary Thrombophilia Investigations refer to Thrombosis Investigations

Collection Alert:

Test cannot be collected by Mobile Collection Service.
Specimen must be collected at an Acute Care Site

Shipping and Handling Alert:

Specimens are time sensitive.

LABID (Connect Care):

LAB311

Specimen Type:

Blood

Specimen Source:

Arterial, Venous, Central Line

Primary Container:

Light Blue Citrate

Minimum Collection Volume:

Adults: One 2.7 mL LT blue citrate tube, allow the vacuum tube to completely fill, minimum fill is to frosted line on tube.
Pediatric and Neonate: One 2.7 mL or 1.8 mL LT blue citrate tube, allow the vacuum tube to completely fill, minimum fill is to frosted line on tube.

Specimen Collection Requirements:

It is important to fill tube to maximum draw.
Mix well immediately after collection by inverting tube 3 to 4 times.
Must be collected by venipuncture. If venous access not available, sample can be drawn from a line but 6x the volume of the line or 5 mL (whichever is less) must be removed prior to collection.
When using a winged blood collection set (butterfly needle), a discard tube must be used to remove the air in the tubing, if only a citrate tube is drawn or is the first tube drawn.

Test Resources:

For testing sent to Calgary:		For testing sent to Edmonton:
	General Laboratory Requisition – 21302		Hematology Specialty Requisition

Stability and Storage:

Room temperature – 3.5 hours

Processing:

For testing sent to Calgary:	For testing sent to Edmonton:
For specimens that will be received beyond stability: Centrifuge to obtain platelet poor plasma (platelet count <10 x 10*9/L) • Aliquot plasma as per Special Coagulation Specimen Aliquoting	For specimens that will be received beyond stability, centrifuge at 2500 RCF for 10 minutes, aliquot plasma into 2 plastic aliquot tubes and freeze.

Transportation:

Room temperature – uncentrifuged
Frozen (dry ice if available)

Routine Turn Around Time:

Calgary:
For stat testing contact Special Coagulation Laboratory After hours contact the Hematopathologist on call.
Edmonton:
Stat testing is available

Testing Schedule:

Daily

Reference Interval:

Greater than or equal to 0.80 U/mL

Critical Value:

Less than 0.30 U/mL

Testing Area:

Calgary: Special Coagulation
Edmonton: Hematology

Performing Site:

Calgary	Diagnostic and Scientific Centre
Edmonton	Royal Alex Hospital and University of Alberta Hospital

Additional Test Information:

1-877-868-6848

Last Updated On:

Tuesday, December 19, 2023