Test Catalog

Test ID: BUAUC    
Busulfan, Intravenous Dose, Area Under the Curve, Plasma

Method Description Describes how the test is performed and provides a method-specific reference

Busulfan analysis is performed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) with calculation of area under the curve (AUC) by integration of the time versus concentration curve from start of infusion to last specimen collection (6-hour AUC).(Unpublished Mayo method)


AUC and clearance are calculated after quantification of busulfan concentration in plasma samples collected at specific time points after the initial infusion.


The AUC is calculated by integration of the plot of time in minutes from the start of infusion until the last specimen collection (independent variable), with busulfan concentration in mcmol/L (dependent variable) and straight-line extrapolation of the immediate postinfusion busulfan concentration to time zero. Clearance is calculated as the dose divided by AUC.


The recommended optimal dose is calculated based on the assumption of an ideal AUC=1100 mcmol*min.(Slattery JT, Risler LJ: Therapeutic monitoring of busulfan in hematopoietic stem cell transplantation. Ther Drug Monit. 1998 October;20[5]:543-549)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


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 Saturday; 2 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 Clinic Laboratories until the release of the test result

3 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

14 days

Performing Laboratory Location Indicates the location of the laboratory that performs the test