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Test Code BLOD0662 Factor IX (9) Assay

Container Type

Sodium Citrate

Specimen Type/Requirements

Sodium Citrate Plasma – Double Spun Platelet Poor

See Coagulation Testing and Platelet Poor Plasma Preparation

Specimen Volume

1.0 mL

Minimum Volume

0.5 mL


Room Temperature: 2 hours
Refrigerated: 4 hours
Frozen: 1 month

Interfering Substances

Hemolysis: Yes – if moderate
Lipemia: No

Transport Temperature



Freeze platelet poor aliquot within 2 hours of collection.
Requires its own separate aliquot.


Double-spun specimens (platelet-poor plasma) are critical for accurate results.

Aliquot must be from appropriately filled 3.2% sodium citrate tube to acquire the appropriate 9:1 blood to anticoagulant ratio that is critical for valid results 

Patient must not be receiving heparin or Coumadin therapy.

Performed Test Frequency

Monday through Friday


Activated Partial Thromboplasting Clot-Based Assay



Performing Lab

Sanford Sioux Falls