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Actin FS PTT

Source Blood
Mnemonic PTTFS
Specimen Requirements Submit order on an Acute Care Requisition.

Adult:
1 x 2.7 mL blue top sodium citrate plastic tube is preferred. 4.5 mL blue top sodium citrate glass tube is also acceptable.

Pediatric:
1 x 2.7 or 1.8 mL blue top sodium citrate tube.

Whole blood. VENOUS COLLECTION ONLY. Skin puncture (capillary) collection is not acceptable.

It is important to fill tube to maximum draw. Mix well. Indicate collection time on tube.

Both PTTFS and Prothrombin Time/INR can be collected on one blue top tube.

When using a winged blood collection set (butterfly needle) a discard tube must be used to remove the air in the tubing, if only a citrate tube is drawn or is the first tube drawn.

Specimen Handling

DO NOT centrifuge until tube arrives at testing site. Keep at room temperature.
MUST arrive within 3.5 hours of collection.

SHC orders only:
Ship stat to FMC.

Additional Information A standard APTT will be performed along with the Actin FS PTT.

If further tests are required, please refer to Hemostasis Study.
Testing Location Hematology-FMC
Testing Frequency Daily
Alternate Name(s) APTT-FS, PTT Actin, PTT-FS
Reference Interval 24.2 - 35.2 seconds