LOINC Code 14117-6: IgG clearance/Albumin clearance (S+CSF) [Ratio]

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component IgG clearance/Albumin clearance. It is commonly used with the system or sample type Ser+CSF.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Observation

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• IgG clearance/Albumin clearance [Ratio] in Serum and CSF
• IgG clearance/Albumin clearance
• 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.
• 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; Ratios; Rto; Serum; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; SR

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions