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Coagulation Screen

Alternative Names/Synonyms	PTINR, APTT, Fibrinogen, D-Dimer
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Hematology
Specimen Type	Blood
Test Code	CSCN4

Ordering Instructions, Requisition

MSH Coagulation requisition form (MS 520)

Clinical Significance

See individual test information for PTINR, APTT, Fibrinogen, D-Dimer

Specimen Requirements (Sample Type)

Plasma (3.2% Na Citrate)

Specimen Requirements (Volume (mL))

Full draw

Specimen Requirements (Tube Type)

Light Blue citrate tube
Collection Containers – Tube Types

Draw (mL)

Adult: 2.7 mL
Pediatric Micro tube: 1 mL

Collection Requirements

Blood Collection Instructions

Storage / Shipment Details

Send whole blood sample(s) at room temperature as soon as possible.
If specimens cannot be shipped immediately, centrifuge and separate plasma within 1 hour of collection, send frozen plasma on dry ice

Sample Stability

See individual Sample stability for PTINR, APTT, Fibrinogen, D-Dimer.

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Automated Coagulation Analyzer

Test Availability

24 hours, 7 days/week.

STAT Turnaround Time

90 minutes.

Routine Turnaround Time

4 hours

Reference Ranges

See individual ranges and values for PTINR, APTT, Fibrinogen, D-Dimer. In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 Extension 4688

Special Instructions

Must indicate anticoagulant status