Test Catalog

Test ID: SFIG    
Cerebrospinal Fluid (CSF) IgG Index Profile, Serum and Spinal Fluid

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

CSF IgG and albumin, and Serum IgG:

The cerebrospinal fluid (CSF) IgG and albumin, and serum IgG are determined by immunonephelometry.  The CSF IgG index and synthesis rate are calculated and reported.(Instruction manual: Siemens BN II Nephelometer Operations. Siemens, Inc.; Version 2.3, 2008; Addendum to the Instruction Manual 2.3, 08/2017)


Serum albumin:

The dye, bromcresol green (BCG), is added to serum in an acid buffer. The color intensity of the blue-green albumin-BCG complex is directly proportional to the albumin concentration and is determined photometrically.(Package insert: Roche Albumin reagent. Roche Diagnostics; 03/2015)

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.

Same day/1 to 2 days

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

See Individual Test IDs

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