Test Catalog

Test ID: FXCH    
Coagulation Factor X Chromogenic Activity Assay, Plasma

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

The chromogenic factor X assay is performed on the Instrumentation Laboratory ACL TOP. In this 2-stage assay, an incubated dilution of the patient’s plasma is combined in equal volumes with a chromogenic substrate and a Russell viper venom/calcium chloride reagent. The patient’s plasma factor X is activated in the presence of calcium by the activator Russell viper venom, which then hydrolyzes the chromogenic substrate creating 2 products, peptide and pNA (paranitroaniline). The pNA is then measured at 405 nm and is proportional to the amount of factor X in the patient’s plasma.(Package insert: Diapharma Factor X Kit. DiaPharma Group, Inc.,West Chester, OH, Rev 06/2006)

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


Day(s) Performed Outlines the days the test is performed. This field reflects the day that the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time before the test is performed. Some tests are listed as continuously performed, which means that assays are performed multiple times during the day.

Monday through Friday

Report Available The interval of time (receipt of sample at Mayo Clinic Laboratories to results available) taking into account standard setup days and weekends. The first day is the time that it typically takes for a result to be available. The last day is the time it might take, accounting for any necessary repeated testing.

1 to 3 days

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 Indicates the location of the laboratory that performs the test