What is the CSF Lactate Test?
The Cerebrospinal Fluid (CSF) Lactate Test measures the lactate levels in the CSF—the fluid surrounding the brain and spinal cord. Lactate is a byproduct of glucose metabolism, and its elevated levels can indicate brain infections, oxygen deprivation, or neurological disorders.
🎯 Purpose of the Test
Differentiate between bacterial & viral meningitis
Detect brain hypoxia (oxygen deprivation)
Diagnose neurological disorders like mitochondrial diseases
Monitor brain infections & metabolic conditions
📊 Normal Ranges & Interpretation (May vary by lab method)
Age Group
Normal CSF Lactate Range (mmol/L)
Adults & Children
1.2 – 2.1 mmol/L
Newborns
1.1 – 3.0 mmol/L
🔺 High CSF Lactate Levels May Indicate:
Bacterial, fungal, or tuberculous meningitis
Brain hypoxia (stroke, trauma, cardiac arrest)
Seizures or mitochondrial disorders
🔻 Low CSF Lactate Levels: Usually not concerning but could indicate metabolic issues in rare cases.
📝 Additional Testing May Include:
CSF Glucose & Protein Tests (To assess infection or inflammation)
Blood Lactate Test (To compare systemic vs. CSF lactate levels)
Lumbar Puncture (Spinal Tap) (To collect CSF sample for further analysis)
MRI or CT Scan (For structural brain abnormalities)
👩‍⚕️ When Should You Get Tested?
Symptoms of meningitis (fever, stiff neck, severe headache, confusion)
Seizures or unexplained neurological symptoms
After a stroke, head trauma, or cardiac arrest
Suspicion of mitochondrial or metabolic disorders