Overview: Lactate CSF TestIntroduction: The Lactate CSF Test measures lactate in cerebrospinal fluid (CSF) to diagnose neurological disorders or infections, causing seizures or fever. Aligned with 2023 AAN guidelines, it uses biochemical methods for high specificity, supporting neurological screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in biochemistry for patients with suspected neurological conditions.
Other Names: CSF Lactate Assay, Neurological Lactate Test.
FDA Status: Laboratory-developed test (LDT), meeting biochemistry standards for diagnostic accuracy.
Historical Milestone: CSF lactate testing began in the 1970s with neurological research. Biochemical methods improved in the 2000s, enhancing diagnostic precision.
Purpose: Measures lactate in CSF to diagnose neurological disorders or infections, guides treatment, and evaluates patients with seizures or fever.
Test Parameters: 1. Lactate (CSF)
Pretest Condition: No fasting required. Collect CSF. Report history of seizures, fever, or neurological symptoms.
Specimen: CSF (sterile container, 1-2 mL). Transport in a biohazard container.
Sample Stability at Room Temperature: 2 hours
Sample Stability at Refrigeration: 24 hours
Sample Stability at Frozen: Not frozen
Medical History: Document seizures, fever, headache, or history of neurological infections. Include current medications, especially antibiotics.
Consent: Written consent required, detailing the tests purpose, neurological implications, and risks of CSF collection.
Procedural Considerations: Uses biochemical methods to measure lactate in CSF. Results are available in 1-2 days, supporting rapid clinical decisions. Performed in laboratories, often for neurological disorder diagnosis.
Factors Affecting Result Accuracy: Improper sample storage or contamination can affect results. Delayed processing may reduce accuracy.
Clinical Significance: Elevated CSF lactate suggests neurological disorders (e.g., meningitis) or seizures, guiding treatment. Normal levels may require further testing.
Specialist Consultation: Consult a neurologist or infectious disease specialist for result interpretation and treatment planning.
Additional Supporting Tests: CSF glucose, CSF protein, or brain MRI to confirm neurological disorder diagnosis.
Test Limitations: Not specific to one condition; other metabolic states may elevate CSF lactate. Clinical correlation is needed.
References: AAN Neurological Guidelines, 2023; Neurology, Deisenhammer F, 2022.
