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Updated: May 21, 2026

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage
10:34

Double Direct Injection of Blood into the Cisterna Magna as a Model of Subarachnoid Hemorrhage

Published on: August 30, 2020

The risk factors for recurrence of chronic subdural hematoma

Shigeo Ohba1, Yu Kinoshita, Toru Nakagawa

  • 1Department of Neurosurgery, Ashikaga Red Cross Hospital, 3-2100 Honjo, Ashikaga City, Tochigi, 326-0808, Japan. shigeo.ohba@gmail.com

Neurosurgical Review
|June 15, 2012
PubMed

Insights

Recurrent chronic subdural hematoma (CSDH) is linked to separated hematomas and postoperative air collection. Understanding these factors can help predict and potentially reduce CSDH recurrence in elderly patients.

Area of Science:

  • Neurosurgery
  • Geriatric Medicine
  • Radiology

Background:

  • Chronic subdural hematoma (CSDH) is prevalent in the elderly.
  • CSDH recurrence rates vary significantly, ranging from 2.3% to 33%.

Purpose of the Study:

  • To identify factors associated with CSDH recurrence.
  • To analyze preoperative and postoperative imaging findings and clinical data.

Main Methods:

  • Retrospective review of 177 CSDH cases (112 male, 65 female, mean age 74.7 years).
  • Analysis of preoperative CT scans (hematoma characteristics, midline shift) and postoperative CT scans (subdural air collection).
  • Evaluation of clinical factors including age, sex, antiplatelet/anticoagulant use, and surgical parameters (irrigation, drain direction).

Main Results:

  • Multivariate analysis indicated that separated hematomas are significantly associated with CSDH recurrence.
  • Postoperative massive subdural air collection showed a trend towards association with hematoma recurrence.
  • Univariate analysis suggested a trend for different recurrence rates among hematoma types.

Conclusions:

  • Separated hematoma morphology is a key predictor of CSDH recurrence.
  • Postoperative subdural air collection may also contribute to recurrence.
  • Drainage tube direction was not found to be associated with CSDH recurrence.

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