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Updated: May 10, 2026
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The Rabbit Blood-shunt Model for the Study of Acute and Late Sequelae of Subarachnoid Hemorrhage: Technical Aspects
Published on: October 2, 2014
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Optimizing shunt integrity during acute subdural hematoma evacuation.
Tatsuya Tanaka1, Hirofumi Goto2, Nobuaki Momozaki3
1Department of Neurosurgery, International University of Health and Welfare Narita Hospital, Narita, Chiba, Japan.
Surgical Neurology International
|October 7, 2024
Summary
Managing acute subdural hematoma (ASDH) in patients with cerebrospinal fluid (CSF) shunts requires careful consideration. Preserving shunt function by increasing valve pressure during hematoma evacuation can reduce recurrence risk.
Area of Science:
- Neurosurgery
- Neurology
- Medical Devices
Background:
- Cerebrospinal fluid (CSF) shunts for hydrocephalus increase risk of intracranial hemorrhage after head trauma.
- Acute subdural hematoma (ASDH) in shunted patients presents management challenges, requiring attention to both hematoma and shunt function.
Purpose of the Study:
- To report surgical cases of ASDH in patients with CSF shunts.
- To evaluate a strategy for managing ASDH while preserving shunt function.
Main Methods:
- Retrospective analysis of five patients with ASDH and CSF shunts undergoing hematoma evacuation (2013-2019).
- Patients' programmable shunt valves were set to maximal pressure to preserve shunt function during evacuation.
Main Results:
- Patients presented with severe neurological deficits; most were elderly and on antithrombotic medications.
- Hematoma evacuation with shunt preservation was performed in all cases.
- ASDH enlargement occurred in one patient treated with burr-hole drainage; Glasgow Outcome Scale scores at discharge were 1 and 3.
Conclusions:
- Increasing shunt valve pressure during hematoma evacuation may reduce bleeding recurrence.
- Endoscopic hematoma evacuation with a small craniotomy, combined with maximal shunt valve pressure, can be effective for shunt preservation.
