PT Mixing Study

SIM

21120 

CPT

85611 

Synonyms

Specimen Type

Sodium Citrate Plasma 

Container

Two tubes – 4.5 ml Sodium Citrate 3.2% Blue stopper tube

Collection Instructions

None

Volume

4 ml plasma 
Min: 2.0 ml 

Additional Information

•  If Plasma is removed, must be stored in Plastic tubes. 
•  Will only be performed if PT is abnormal.

Patient Preparation

none

Specimen Processing Instructions

Frozen Platelet Poor Plasma: Centrifuge at 3380 rpm’s (±100) for 15 minutes, remove plasma into a plastic tube and centrifuge again to achieve platelet poor plasma,  Transfer to a new tube send frozen to the .

Transport Requirements

Whole Blood: Room Temperature

Platelet Poor Plasma: Frozen 

Do Not Refrigerate

Specimen Stability

Room Temperature Plasma/Whole Blood: 24Hours

Frozen Platelet Poor Plasma: 14 Days (-20 degrees)

Rejection Criteria

  Clotted Sample 
  Insufficient volume

Refrigerated

Reference Range

Interpretation = Normal

Critical Value

None 

Test Includes

PT Mixing study and are reviewed by the Pathologist before reporting. 

Methodology

Electromagnetic mechanical clot detection system 

Testing Frequency

First and Second shift only, Daily, Monday - Sunday 

Reviewed By

Crystal Killian 

Reviewed Date

3/2/2021

Supplemental