Acute Hydrocephalus Suspected
Clinical deterioration with CT showing ventricular enlargement
All Pathways
NeurosurgeryEmergency
Acute Hydrocephalus - Emergency Management
Acute Hydrocephalus - Emergency Management: Acute Hydrocephalus Suspected → Identify Etiology → Clinical Status? → ⚠️ CRITICAL - Impending Herniation → ...
Pathway Overview
15 steps
Algorithm Steps
15 total
01Start 02Action Identify Etiology
Determine cause of acute hydrocephalus
- SAH (most common)
- Intraventricular hemorrhage (IVH)
- Tumor (posterior fossa, pineal, intraventricular)
- Meningitis/ventriculitis
- Aqueductal stenosis
- Shunt malfunction (if previously shunted)
03Decision Clinical Status?
Assess level of consciousness and neurological exam
04Warning ⚠️ CRITICAL - Impending Herniation
GCS ≤8, posturing, pupillary changes
- Cushing triad present
- Fixed/dilated pupils
- Decerebrate/decorticate posturing
- Rapid decline
05Action EMERGENT EVD Placement
Place external ventricular drain immediately (AHA Class I)
- Kocher's point or alternative approach
- Target: frontal horn of lateral ventricle
- Connect to closed drainage system
- Set initial drain height 15-20 cmH2O above EAM
06Action EVD Management
Post-placement care
- Target ICP <22 mmHg
- CPP goal 60-70 mmHg
- Drain CSF in 5-10 mL aliquots
- Monitor CSF output hourly
- Send CSF for studies daily or if infection suspected
07Decision Signs of EVD Infection?
Fever, CSF pleocytosis, meningismus
08Action Treat Ventriculitis
IV antibiotics + consider intrathecal
- Vancomycin + Cefepime/Meropenem
- Intrathecal vancomycin if severe
- Consider EVD replacement
- Adjust based on cultures
09Action EVD Weaning Trial
Assess for shunt dependence
- Clamp EVD, monitor ICP
- Repeat imaging after 24-48h clamped
- If tolerates: consider removal
- If fails: permanent shunt (VPS)
10Decision Definitive Treatment Needed?
Based on etiology and EVD weaning
11Outcome Disposition
EVD removal vs permanent shunt vs ETV based on etiology and course
- Path rejoins step 09Shared downstream outcome
12Action Symptomatic Hydrocephalus
Declining GCS, headache, vomiting, visual changes
- GCS 9-14 with decline
- Severe headache
- Persistent nausea/vomiting
- New cranial nerve palsies (esp CN VI)
13Action EVD Placement Indicated
Plan for urgent EVD
- Consult neurosurgery stat
- Prepare for OR or bedside procedure
- Obtain consent if possible
- Prophylactic antibiotics per protocol
- Path rejoins step 06Shared downstream outcome
14Action Mild/Asymptomatic
Awake, mild symptoms, stable exam
15Action Close Monitoring
Serial neuro exams and imaging
- Neuro checks q1-2h
- Repeat CT in 6-12h or with change
- Low threshold for EVD
- Treat underlying cause
- Path rejoins step 13Shared downstream outcome
Guideline Source
AHA/ASA 2023 Guidelines for the Management of Patients with Aneurysmal Subarachnoid Hemorrhage + Neurocritical Care Society Guidelines
Clinical Safety Information
Clinical Decision Support — Not a Substitute for Clinical Judgment
Individual patient factors may require deviation from these recommendations.
Known Limitations
- EVD insertion requires neurosurgical expertise
- Does not cover chronic/NPH hydrocephalus
- Pediatric considerations may differ
- ETV candidacy requires specialist evaluation
- Infection prevention protocols vary by institution
Applicable Regions
USEUGlobal
EU: Compatible with European neurosurgical standards
US: Follows AHA/ASA and NCS guidelines
Version 1Next review: 2028-01-01
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Related Resources
Frequently Asked Questions
What is the Acute Hydrocephalus - Emergency Management?
The Acute Hydrocephalus - Emergency Management is a emergency clinical algorithm for Neurosurgery. It provides a structured decision tree to guide clinical decision-making, based on AHA/ASA 2023 Guidelines for the Management of Patients with Aneurysmal Subarachnoid Hemorrhage + Neurocritical Care Society Guidelines.
What guideline is the Acute Hydrocephalus - Emergency Management based on?
This algorithm is based on AHA/ASA 2023 Guidelines for the Management of Patients with Aneurysmal Subarachnoid Hemorrhage + Neurocritical Care Society Guidelines (DOI: 10.1161/STR.0000000000000419).
What are the limitations of the Acute Hydrocephalus - Emergency Management?
Known limitations include: EVD insertion requires neurosurgical expertise; Does not cover chronic/NPH hydrocephalus; Pediatric considerations may differ; ETV candidacy requires specialist evaluation; Infection prevention protocols vary by institution. Individual patient factors may require deviation from these recommendations.
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