• APTT
• If appropriate, normal plasma APTT, equal mix APTT (immediate) and equal mix APTT (incubated 60 minutes)

Lt blue Sodium citrate (Na Cit) - 2.7mL

If the patient has a hematocrit >55, a specially prepared Lt blue Sodium citrate (NaCit) tube must be used in place of the standard Lt blue Sodium citrate (NaCit) tube.

Hematocrit-Anticoagulant adjustments

• Do not over or under fill tube as the ratio of anticoagulant to whole blood is critical

• Coag – tube fill guidelines

• Immediatley following collection, mix sample thoroughly by gentle inverting 8 - 10 times, to prevent clotting

• Process Platelet Poor Plasma (P.P.P)
  • Coag – how to prepare a specimen for special coagulation testing
• Transfer plasma into an aliquot tube using a spot label "NaCit Plasma P.P.P" to label as platelet poor plasma
• Freeze immediately

Microcentrifuge vial/tube in a Snap cap conical vial/tube and cap (Beaker sites)

Coagulation specimen transport vial/tube  (all other sites)

Send whole blood sample in original collection container with STAT courier.

Must be tested within 4 hours of collection.

Lt blue Sodium citrate (NaCit) - 2.7mL

Routine testing (plasma):

Frozen (strict)

STAT testing (whole blood):

Ambient - 4 hours

Refrigerated - NO

• Improper label (unlabeled or mislabeled)
• Improper anticoagulant
• Improperly filled tube
• Hemolysis
• Clotted specimen
• Delay in transport
• Improper storage/transport temperature
• Grenier tubes are not acceptable

Clot Based Assay

See report

Medical necessity