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EPIC CODE: LAB325 Activated Partial Thromboplastin Time

ADDITIONAL TEST CODE

Sunquest: PTT

REGIONAL HOSPITAL PERFORMING

UPH Methodist Hospital – Coagulation Section
UPH Pekin Hospital
UPH Proctor Hospital

Collect

One light blue (3.2% buffered sodium citrate)
Specimen must be filled to the fill line on the tube. Mix thoroughly by gently inversion.

Storage/Transport Temperature

Ambient (20°C ± 5). If testing will not be performed within 4 hours, specimen must be spun within one hour of collection and seperated. Plasma should be transferred to a polyproplene plastic tube and frozen.

Stability (from collection to initiation)

Ambient: 4 hours whole blood/plasma. NOTE: If patient is on heparin therapy, stability is reduced. Separate plasma within one hour of collection; plasma remains stable for 2 hours at ambient temperature.
Refrigerated (2-8oC) Stability:2-8oC: not acceptable
Frozen Stability: 2 weeks

Unacceptable Conditions

Serum, clotted or grossly hemolyzed sample, underfilled/overfilled tube.

Refrigerated specimens (2-8oC)

Stability: samples, samples greater than 4 hours old (2 hours if patient is on heparin therapy)

Remarks

Draw specimen 1 hour before next dose of heparin if heparin is being given by intermittent infusion. If specimen is being drawn from cath line, discard 10 mL blood prior to draw.

Days Performed

Daily

Methodology

Electromagnetic mechanist clot detection – Stago Compact Max

Reference Interval

Normal: 22.6 - 34.1 seconds

Critical Value: >127 seconds

CPT Codes

85730