Prothrombin Time
Alternate Names
PT, PT/INR, INR, Protime
SoftLab Order Code
PT
Epic Order Name
PT/INR
Epic Order ID
LAB320
Laboratory
All Sites
Sample Type
Plasma
Collection Container
Blue Top (Sodium Citrate - Light blue)
Collecting Volume
One full light blue tube
Minimum Collecting Volume
One full light blue top tube
Neonatal Minimum Volume: Special low volume collection tubes are available for Neonatal patients if blood volume collection is limited by clinical condition. Contact the laboratory at 08242 to request a collection tube. A calculation using the patient's hematocrit may be required to determine the amount of sample to be collected.
Neonatal Minimum Volume: Special low volume collection tubes are available for Neonatal patients if blood volume collection is limited by clinical condition. Contact the laboratory at 08242 to request a collection tube. A calculation using the patient's hematocrit may be required to determine the amount of sample to be collected.
Storage or Stability
Ambient - 24 hours
Frozen - Plasma stable 3 months
Stability may vary if additional studies are ordered on the same sample. The test with the shortest stability should be considered when evaluating storage/stability for testing
Frozen - Plasma stable 3 months
Stability may vary if additional studies are ordered on the same sample. The test with the shortest stability should be considered when evaluating storage/stability for testing
Causes for Rejection
Clotted, wrong tube type, grossly hemolyzed, over or underfilled collection tube
Instructions
Freeze plasma if testing cannot be completed within ambient stability period.
Availability
24 hours / 7 days
CPT Codes
85610