Viscoelastic Clot Assessment (POCT)


Abbrev Code:VCAPOCT   
Order Code:POC400Order Name:Viscoelastic Clot Assessment POCT
Order Instructions:Test must be performed immediately at the point of care or within 4 hours of collection. Alternatively samples can sent via PTS or hand delivered to Acute Care for testing.
Synonyms:Platelet function; VET; VCA
Methodology:Sonic Estimation of Elasticity via Resonance (SEER) Sonorheometry
CPT Codes: 85396 x1, 85396 x1
Turnaround Time:Available 24/7 at UMMC East; reported same day.


Collection Instructions

Specimen:Whole blood
Minimum\Peds Volume:3.0 mL
Container:
Alternate Containers: Blue Na Citrate, 3.2% - fill to fill line on tube
Collection Instructions:
  1. A discard tube should be drawn. 
  2. The blood collection tube must be filled to the minimum fill line. The entire blood sample will be used for analysis on the Quantra.  
  3. Citrated tubes should be gently mixed by inversion at time of collection.
  4. Gently invert the blood collection tube 5 times before attaching it to the cartridge.
East Bank: If test is not available at the point of care, call 612-273-5551 or 612-273-3196 prior to collection to notify lab staff. Test must be ordered and performed within 4 hrs. of collection. Order test and walk sample to the lab
Causes for Rejection:Samples older than 4 hours. Underfilled tubes. Clotted samples.


Processing and Shipping

Stability:4 hours at room temperature
Test Performed at or Referral Lab Point of Care  (UMMC East Bank)


Interpretive

Reference Range:
Clot Time 113-166 sec
Clot Time with Heparinase 103-153 sec
Clot Stiffness 13.0-33.2 hPa
Fibrinogen Contribution to Clot Stiffness 1.0-3.7 hPa
Platelet Contribution to Clot Stiffness 11.9-29.8 hPa
Clot Time Ratio Qualitative test with a cut-off value at 1.4.  Test results above 1.4 are indicative of prolongation of the intrinsic pathway clotting time due to the presence of heparin.
 
Use:The Quantra QPlus System is indicated for the evaluation of blood coagulation in perioperative patients age 18 years and older to assess possible hypocoagulable and hypercoagulable conditions in cardiovascular or major orthopedic surgeries before, during, and following the procedure.


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