Overview ventricular system Snapshot A 22-year-old male presents with altered mental status, fever, and headache. The patient is able to sluggishly answer questions. Passive flexion of the neck leads to spontaneous contraction of the hips. Pain is elicited when attempting to fully extend the knee while his hips are at a 90 degree angle. A skin finding is shown to the right. Introduction Function login to view 7 more bullets Production login to view 5 more bullets Ventricular system communications login to view 7 more bullets Compared to the serum: login to view 5 more bullets Presentation Cerebrospinal Fluid Analysis Test Normal Bacterial Viral Fungal/TB Opening pressure ≤ 20 cm H2O ↑ normal or slightly ↑ ↑ Color Clear Cloudy Clear Cloudy Cell count 0-5 cells/µL ↑ (PMN) ↑ (Lymphocytes) ↑ (Lymphocytes) Protein < 45 mg/dL ↑ Slighty ↑ ↑ CSF:Serum glucose > 0.6 ↓ Normal ↓ Hydrocephalus login to view 27 more bullets