Description
Why It’s Done
The Glucose for Fluid Test may be ordered to:
• Diagnose infections:
o Meningitis: Low glucose levels in CSF can be indicative of bacterial or viral meningitis.
o Infections in other body fluids (such as pleural fluid or joint fluid) can also be assessed by measuring glucose.
• Monitor disease progression: In conditions like tuberculous meningitis or cancer, glucose levels in body fluids can help monitor the severity or progress of the condition.
• Identify other conditions:
o Autoimmune diseases or conditions like rheumatoid arthritis affecting joint fluid (synovial fluid).
o Assessing metabolic disorders or disturbances in fluid production.
Glucose levels in CSF are usually lower in bacterial meningitis than in viral meningitis or other conditions.
Preparation
Preparation for the glucose for fluid test typically involves the following:
• No fasting is required for this test as it is based on fluid samples.
• Collection method: The fluid sample will be collected through specific procedures:
o CSF: A lumbar puncture (spinal tap) is done to obtain cerebrospinal fluid.
o Synovial fluid: Collected via arthrocentesis (joint aspiration).
o Pleural fluid: Collected by a thoracentesis (needle insertion into the chest).
• Inform your doctor about any medications or treatments being used, as some could affect glucose levels in body fluids.


