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

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

In this ex vivo assay, the patient's plasma factor X is activated in the presence of calcium by the activator Russell's viper venom. The activated factor X then hydrolyzes a chromogenic substrate (S2337), releasing a chromophore (paranitroaniline) that is detected by monitoring light absorbance at 405 nm.(Egberg N, Heedman PA: Simplified performance of amidolytic factor X assay. Thromb Res 1982;25:437-440)

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

No

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

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