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Postoperative subdural fluid collections in neurosurgery.
Surgical Neurology
|February 1, 1987
Summary
Postoperative subdural fluid collections (SFCs) are common after neurosurgery, particularly aneurysm surgery. While most SFCs resolve, some increase, potentially linked to preoperative ventricular dilatation.
Area of Science:
- Neurosurgery
- Radiology
- Neuroradiology
Background:
- Computed tomography (CT) scanning has increased the detection of subdural fluid collections (SFCs).
- Postoperative SFCs are a recognized complication following various neurosurgical procedures.
Purpose of the Study:
- To investigate the incidence and characteristics of postoperative subdural fluid collections (SFCs).
- To identify risk factors and outcomes associated with postoperative SFCs.
Main Methods:
- Retrospective analysis of 1013 operated cases with early postoperative CT scans.
- Evaluation of SFC occurrence, progression, and association with surgical type and preoperative conditions.
Main Results:
- Postoperative SFCs were detected in 17% (165/1013) of cases.
- Highest incidence observed in aneurysm surgery (47%), followed by neurovascular decompression (27%) and brain tumor surgery (22%).
- Preoperative ventricular dilatation was associated with SFC occurrence in aneurysm and tumor surgeries; 27 cases showed SFC increase, peaking 20-30 days post-op.
Conclusions:
- Postoperative SFCs are a frequent finding, with varying incidence based on neurosurgical procedure.
- Preoperative ventricular dilatation is a potential risk factor for SFC development and progression.
- Most SFCs resolve spontaneously, but monitoring is crucial for cases with increasing thickness, with rare progression to chronic subdural hematomas.