Method Description Describes how the test is performed and provides a method-specific reference
The instrument use for testing is the Roche Cobas 6000. An equal volume of 25% polyethylene glycol (PEG) is added to a serum prolactin sample causing the biologically inactive form of prolactin (macroprolactin) to precipitate. Following centrifugation, prolactin is measured in the supernatant (containing unprecipitated prolactin), as well as in an aliquot of the native sample. Precipitated prolactin is calculated by subtracting the unprecipitated prolactin value from the total prolactin. The percentage of precipitated prolactin to total prolactin indicated the presence or absence of macroprolactin. (Package insert: Elecsys and Modular Prolactin II, Roche 2005)
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.
Monday through Friday 5 a.m. – 12 a.m., Saturday 6 a.m. – 6 p.m.
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.
Same day/1 day
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
Performing Laboratory Location The location of the laboratory that performs the test