AT III Activity/Antigen with Reflex AT3 FUNCT

Synonyms

Allscripts (AEHR) Order Name

Antithrombin III Assay

Sunrise Clinical Manager (SCM) Order Name

Antithrombin III Assay with Reflex

EPIC Order Name

Antithrombin III (AT III) Activity/Antigen with Reflex

Clinical Info

Specimen Type

Blood

Container

Blue Top Tube (HNAC 96)

Collection Instructions

Draw blood in a light blue-top (3.2% sodium citrate) tube(s). Fill tube(s) completely. Invert several times to mix blood. Spin down and place 1 mL of citrated plasma into 2 plastic vials each containing 0.5 mL of citrated plasma.
Note:  1. If no other tube is drawn, draw a discard tube.
2. If there is a delay in transport, spin down, remove plasma, spin plasma again, and place 1 mL of platelet-poor plasma into 2 plastics vials each containing 0.5 mL of platelet-poor plasma. Send specimen frozen. Double-centrifuged specimens are critical for accurate results as platelet contamination may cause spurious results.

Transport Instructions

Specimen Stability

Methodology

Chromogenic-ACLTop Beckman/Coulter/IL

Days Performed

One to 2 times per week

Performing Laboratory

Northwell Health Laboratories

CPT

85300 Activity
85301 Antigen
Loinc Codes
Activity: 27811-9
Antigen: 27812-7

PDM

5302580

Result Interpretation

85-135%
If the AT3 functional is abnormal low (<85) the AT3 Antigen (AT3 IMMUNO) reflexes at an additional charge.

Forms