Lumbar Puncture & CSF Analysis
Opening pressure, oligoclonal bands, and infectious profiles in cerebrospinal fluid.
Normal CSF Parameters (Adults)
- Opening Pressure: 10-20 cm H2O (in lateral decubitus position)
- White Blood Cells: 0-5 cells/µL (predominantly lymphocytes)
- Protein: 15-45 mg/dL
- Glucose: 50-80 mg/dL (roughly 60% of serum glucose)
Typical Infection Profiles
| Etiology | WBCs | Protein | Glucose |
|---|---|---|---|
| Bacterial | 100-10,000 (PMNs) | High (>100) | Low (<40) |
| Viral | 10-500 (Lymphs) | Normal / Mildly High | Normal |
| Fungal / TB | 10-500 (Lymphs) | High | Low |
Common Clinical Mistakes
- Premature anchoring on common diagnoses without evaluating red flags.
- Over-reliance on neuroimaging while neglecting detailed physical exams.
- Suboptimal dosing of first-line agents before declaring treatment failure.
Frequently Asked Questions
- When is immediate specialist referral required?
- Urgent referral is indicated for sudden onset of severe symptoms, rapidly progressive deficits, or when standard therapies fail.
- What are the primary outcome measures in recent clinical trials?
- Most contemporary trials focus on slowing disease progression (e.g., EDSS in MS, UPDRS in Parkinson's) and reducing relapse/event rates.
- How does this condition impact patient life expectancy?
- While highly variable, modern disease-modifying therapies have significantly improved long-term survival rates across neurodegenerative and neuroimmunological disorders.