Lactate in Cerebrospinal Fluid (CSF) by Enzymatic Method
This test measures the level of lactate, a byproduct of energy production, in your cerebrospinal fluid. It may be used to assess conditions affecting brain metabolism or blood flow.
["Lactate in CSF can help diagnose or monitor neurological conditions."]
Key facts at a glance
- LOINC
- 109786-4
- Short code
- LACV Ab Msmt CSF
- Synonyms
- LACV Ab Msmt CSF
- Category
- chemistry
- Sample
- csf
- Container
- Sterile tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Specimen volume
- 1-2 mL
- Stability
- Immediate analysis required, Refrigerated: 1h
- Hemolysis max
- 200
- TAT
- 4–24 hours
- Order
- routine
Why Is This Test Done?
Your healthcare provider may order this test if you have symptoms like severe headaches, confusion, seizures, or neurological issues that could suggest conditions like stroke, brain infection, or metabolic disorders. It may also be part of a broader evaluation for suspected brain swelling or poor blood flow to the brain.
What Does the Test Involve?
A small amount of cerebrospinal fluid is collected through a procedure called a lumbar puncture (spinal tap). The fluid is then sent to the lab for testing. This test is typically done under sterile conditions to prevent infection.
What Are Possible Results?
Results are interpreted by your healthcare provider based on your medical history, symptoms, and other test results. Elevated lactate levels may indicate conditions such as brain hypoxia (low oxygen), infections, or metabolic disturbances.
What Are Common Conditions Monitored?
This test is often used to monitor or diagnose conditions like ischemic stroke, encephalitis, meningitis, or other neurological emergencies where lactate levels in CSF may be abnormal.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: Elevated lactate in CSF can signal impaired brain function, such as reduced blood flow or increased metabolic demand. It may also be linked to inflammatory processes or infections affecting the central nervous system. Your provider will consider the context of your symptoms and other findings to determine if further action is needed.
Short name
CSF Lactate
Frequently asked questions
What does an elevated lactate level in CSF mean?
How is CSF lactate tested?
Is there any preparation needed before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy