PTT X_Mean
General Information
Lab Name
PTT X_Mean
Lab Code
PTTXM
Interpretation
Reference Range
Ref. Range Notes
The PTT X Mean is a ratio of the patient's PTT divided by the mean of the normal PTT range. It was formerly used to monitor heparin therapy until UW specific ranges were instituted. The UW heparin range is PTT of 60 - 100 seconds. Although, the PTT X Mean can also be used to monitor the newer direct thrombin inhibitors, we recommend the DTI assay instead.
Ordering & Collection
Specimen Type
Collection
Processing
Performance
LIS Dept Code
Coagulation (COAG)