Investigating possible central nervous system infection
Photometric, Glucose Oxidase/Peroxidase
CSF
Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge to remove any cellular material.
0.25 mL
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
CSF | Frozen (preferred) | 30 days | |
Refrigerated | 7 days |
Investigating possible central nervous system infection
Cerebrospinal fluid (CSF) is secreted by the choroid plexuses,
CSF glucose levels may be decreased due to consumption by
Spinal fluid glucose concentration should be approximately 60% of the
For SI unit Reference Values, see https://www.mayocliniclabs.com/order-tests/si-unit-conversion.html
Cerebrospinal fluid (CSF) glucose levels may be decreased in any central nervous system infection,
CSF glucose levels are normally about 60% of blood glucose
Handle specimens in stoppered
Cerebrospinal fluid specimens should be processed without delay; they may
Tietz Textbook of Clinical Chemistry and Molecular Diagnostics. Edited by CA Burtis, ER Ashwood, DE Bruns, St. Louis, MO, Elsevier Saunders, 2012
Patient specimen is deposited on the slide where the spreading layer promotes the uniform distribution of the specimen and permits an even penetration of solute molecules into the underlying reagent layer. The oxidation of specimen glucose is catalyzed by glucose oxidase to form hydrogen peroxide and gluconate. The reaction is followed by an oxidative coupling catalyzed by peroxidase in the presence of dye precursors to produce a dye. The intensity of the dye is measured by reflected light.
Each mole of glucose oxidized results in 0.5 mole of dye, assuming quantitative conversions. The intensity of the dye is measured by reflected light at 540 nm and concentration is reported in milligrams per deciliter.(Package insert: Vitros Chemistry Products Instructions for Use-GLU Slides, Ortho-Clinical Diagnostics, Inc. Rochester, NY 14626)
Monday through Sunday
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
82945
Test Id | Test Order Name |
Order LOINC Value
Provides guidance in determining the Logical Observation Identifiers Names and Codes (LOINC) values for the order and results codes of this test. LOINC values are provided by the performing laboratory.
|
---|---|---|
GLSF | Glucose, CSF | 2342-4 |
Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
---|---|---|
GLSF | Glucose, CSF | 2342-4 |