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Test & Collection Guide

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Coagulation Studies

Ordering information:

Please note that Coagulation Studies consists of the following tests :

PT (INR)

APTT

Thrombin Time (TT)

Fibrinogen

Laboratory:

Coagulation

Test Code:

COAGP

Specimen types:

Plasma

Container types:

Sodium Citrate

Collection Instructions:

Do not use 1.0 mL citrate tubes

Notes:

When blood is collected from an arterial line it is necessary to discard the first 20 mL of blood to clear any heparin from the line before collecting the blood for coagulation tests

When collection is by vacuum tube, the coagulation tube should be collected second to avoid artefactual shortening of coagulation assays due to trauma of venesection

When blood is collected for an APTT or Anti-Xa Assay for control of heparin or low molecular weight heparin therapy, it is essential that the citrate tube is sent immediately to the laboratory

Frequency:

Daily

Result Turnaround Time:

2 hours

Reference Interval:

Adult reference intervals:

PT 10 - 15 sec

INR 0.9 - 1.3

APTT 25 - 37 sec

TT 11 - 17 sec

FIB 1.9 - 4.3 g/L

Laboratory Use Only

Accessing Results

EMR: Pathology results are available via EMR.

Auscare: If EMR is unavailable, results can be accessed through Auscare. Don’t have an Auscare login? Complete the Auscare User Form.

To access Auscare, see instructions.

Forms & Collection Guides

Consent Form – Non-Medicare Tests
For tests not covered by Medicare. Download Form

Pathology Request Form
Printable referral form for submitting pathology requests. Download Form.

Microbiology Swab Collection Guide
Step-by-step instructions for correct swab collection. Download Guide.

Preferred Order of Draw
Instructions to ensure accurate blood collection and results. View Instructions

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