Test ID: URAU
Urea, Urine
Method Description 
Describes how the test is performed and provides a method-specific reference
Urea is hydrolyzed by urease to form ammonia and CO2. The ammonia formed then reacts with keotglutarate and NADH in the presence of GLDH to yield glutamate and NAD+. The decrease in absorbence is due to consumption of NADH is measured kinetically at 340 nm. (Package insert: Roche Urea; BUN Package insert: Roche Diagnostic Corp, Indianapolis IN)
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 Sunday; 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.
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
1 day
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
7 days
Performing Laboratory Location The location of the laboratory that performs the test
Rochester
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