Ptt Mixing Study

Test Code

PTTMS

CPT Codes
85670; 85730; 85732 x 2

Includes

PTT Baseline, TT, PTT 1:1 Mix Immediate, PTT 1:1 Mix Incubated

Preferred Specimen

1 Sodium Citrate Plasma Blue

Minimum Volume

Blue top must be filled to Minimum Fill Indicator Line on tube.

Other Acceptable Specimens

none

Instructions

Outreach clients should spin the blue top, remove the plasma, and freeze in a polypropylene tube.

Transport Container

BLUE, polypropylene tube

Transport Temperature

Blue - RT; polypropylene - frozen

Specimen Stability

Blue - 4 hours RT if patient not on heparin, 1 hour RT if patient on heparin; Plasma - 4 hours RT, 4 hours refrigerated, 2 weeks frozen

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Sample must be free of clots and hemolysis.

Methodology
Electromagnetic Viscosity Detection

Setup Schedule

Daily on Receipt

Report Available

Upon Completion of Analysis

Reference Range

SEE REPORT

Clinical Significance

The mixing of the patient sample with normal plasma will correct the abnormality when the sample is deficient in a factor or factors. If the abnormality is due to the presence of an inhibitor or circulating anticoagulant, the abnormality will not be corrected. If there is partial correction but the result is still abnormal, further studies are required to rule out a weak inhibitor.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.