Test ID: PT
Prothrombin Time, Plasma
Method Description 
Describes how the test is performed and provides a method-specific reference
The STA-R Evolution is a fully automated coagulation instrument, which uses an electromechanical viscosity detection system. The oscillation of a steel ball within the cuvette with the thromboplastin and plasma is monitored by the instrument. At constant viscosity, pendular swings of the ball are obtained within an electromagnetic field. As the plasma clots, the viscosity increases, and the oscillation amplitude of the ball swing decreases. An algorithm uses these variations in oscillation amplitude to determine the clotting time.(RecombiPlasTin 2G Package Insert, 2008; STA-R Evolution Operators Manual)
Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.
Daily; Continuously
Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.
1 day
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
1 day
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
24 hours
Performing Laboratory Location The location of the laboratory that performs the test
Rochester
External
link
PDF
document
Excel
document
Word
document