PTT Incubated Mixing Study




Test Mnemonic

PTTIM

CPT Codes

  • 85730 - QTY (1)
  • 85610 - QTY (1)
  • 85670 - QTY (1)
  • 85520 - QTY (1)
  • 85390 - QTY (1)

Aliases

  • APTT Incubated Mixing Study
  • APTT Mixing Study
  • CAC
  • CACLA
  • Circulating Anticoagulant
  • PTT Correction Study
  • PTT Mixing Study

Performing Laboratory

Cleveland Clinic Laboratories


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
4 mLPlasmaSodium citrate (Lt. Blue) Frozen 

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1.5 mL     

Stability

Environmental Condition Description
Ambient4 hours
RefrigeratedUnacceptable
Frozen14 days at -20 C; 6 months at -70 C

Days Performed

Mon - Fri

Turnaround Time

1 - 3 days

Methodology

Name Description
Clot Detection 

Reference Range

APTT Screen
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal28.2-47.4sec
 1 Months3 MonthsNormal21.7-43.5sec
 2 Days5 DaysNormal22.9-52.0sec
 6 Days30 DaysNormal23.1-48.0sec
 4 Months11 MonthsNormal25.3-37.3sec
 1 Years5 YearsNormal21.3-31.6sec
 6 Years10 YearsNormal23.1-31.6sec
 11 Years16 YearsNormal23.1-32.5sec
 17 Years99 YearsNormal24.0-35.1sec
PT Screen
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal< 14.9sec
 1 Months3 MonthsNormal< 13.3sec
 2 Days5 DaysNormal< 14.3sec
 6 Days30 DaysNormal< 13.4sec
 4 Months11 MonthsNormal< 13.0sec
 1 Years5 YearsNormal< 10.7sec
 6 Years10 YearsNormal< 11.3sec
 11 Years16 YearsNormal< 11.2sec
 17 Years99 YearsNormal< 13.1sec
Thrombin Time
Sex Age From Age To Type Range Range Unit
   Days1 DaysNormal< 17.3sec
 2 Days5 DaysNormal< 17.9sec
 6 Days30 DaysNormal< 17.9sec
 1 Months3 MonthsNormal< 18.2sec
 4 Months11 MonthsNormal< 19.1sec
 1 Years999 YearsNormal< 18.6sec

Special Info

If tests are abnormal in the panel, the following tests may be ordered and billed: PTT Immediate and 1 Hour Incubated Mix (85732 x2), Factor II (85210), Factor V (85220), Factor VII (85230), Factor X (85260), Factor VIII (85247) Factor IX Assay (85250), Factor XI Assay (85270), Factor XII Assay, Reptilase Time (85635), D-Dimer (85379) & Fibrinogen Ag (85385).

Clinical Info

To distinguish a coagulation factor deficiency from an inhibitor.