LOINC Code 89531-8: Smith extractable nuclear Ab Line blot Ql (CSF)

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 Smith extractable nuclear Ab. It is commonly used with the system or sample type 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: Both
• Method: Line blot

What it does not mean

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

Key facts

• Smith extractable nuclear Ab [Presence] in Cerebral spinal fluid by Line blot
• Smith extractable nuclear Ab
• This term was created for, but is not limited in use to, the submitter's test strip, a membrane strip pre-coated with a specific set of antigens in parallel lines. If antibodies to any of those antigens are present in the patient's serum, they will bind to the specific antigen. The bound patient antibodies are then detected using labelled anti-human antibodies. Manufacturers call this method by different names, including immunoblot, line blot, and line immunoassay. LOINC uses the immunoblot (IB) method to mean that some electrophoretic/chromatographic separation occurs such that position (size) of the band is part of the assessment (as in Western blot). Because this assay does not involve a separation step but rather uses strips with pre-fixed antigens, the LOINC Method for this term is Line blot.
• ABS; Aby; ANA; ANF; Antby; Anti; Antibodies; Antibody; Antinuclear antibody; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; ENA; ENA SM; NA; Neuro; Neurology; Nuc; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; SM; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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