14117-6
LOINC Code
| LOINC code | 14117-6 | ||
|---|---|---|---|
| name | |||
| description | Ratio of a patient's IgG and albumin in CSF to the IgG and albumin in serum is of diagnostic value in a number of neurological disorders. Normally CSF albumin and IgG are derived from the serum, whereas in patients with active multiple sclerosis, the increased CSF IgG is believed to be synthesized within the CSF. The CSF Index is a calculated value which expresses the ratio of IgG to albumin in CSF, to the ratio of IgG to albumin in serum. An elevated ratio suggests local CNS synthesis of IgG. An increased CSF/IgG Index is found in diseases such as MS, neurosyphilis, subacute sclerosing panencephalitis (SSPE), chronic CNS infections and CNS lupus erythematosus. | ||
| status | ACTIVE | ||
Fully-Specified Name | |||
| component | IgG clearance/Albumin clearance | ||
| property | Ratio | ||
| time | Pt = Point in time: To identify measures at a point in time. This is a synonym for “spot” or “random” as applied to urine measurements. | ||
| system | Ser+CSF Ser = Serum CSF = Cerebral spinal fluid | ||
| scale | Qn = Quantitative: The result of the test is a numeric value that relates to a continuous numeric scale. Reported either as an integer, a ratio, a real number, or a range. The test result value may optionally contain a relational operator from the set {<=, <, >, >=}. Valid values for a quantitative test are of the form "7", "-7", "7.4", "-7.4", "7.8912", "0.125", "<10", "<10.15", ">12000", 1-10, 1:256 | ||
| method | |||
Additional Names | |||
| short name | Alb; Alb clear; Both serum and cerebrospinal fluid; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Cl; Clear; Clearanc; Clearances; Clr; Immune globulin G; Immunoglobulin G; Point in time; Protein.albumin; QNT; Quan; Quant; Quantitative; Random; Rati | ||
Basic Attributes | |||
| class | CHEM | ||
| type | 1 Laboratory | ||
| order vs. observation | IgG/Alb clear S | ||
| formula (readable) | IgG index = (IgG, CSF/IgG, serum)/(albumin, CSF/albumin,serum) | ||
Member of these Panels | |||
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History/Usage | |||
| first released | |||
| last updated | 2.73 | ||
| last change type | MIN - change to field other than name | ||
Related Names | |||
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