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Updated: Nov 11, 2025

Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
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Endoscopic-assisted surgery for skull defects with subdural effusion.

Jian-Yun Zhou1,2, Xin Zhang1,2, Hai-Bin Gao1,2

  • 1Department of Neurosurgery, Beijing Boai Hospital, China Rehabilitation Research Centre, Beijing, China.

Wideochirurgia I Inne Techniki Maloinwazyjne = Videosurgery and Other Miniinvasive Techniques
|March 31, 2021
PubMed
Summary

Subdural effusion after decompressive craniectomy can be effectively treated using endoscopic-assisted surgery. This method, involving hemostasis gauze placement, significantly reduces postoperative complications compared to traditional approaches.

Keywords:
endoscopicskull defectsubdural effusion

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Area of Science:

  • Neurosurgery
  • Surgical Innovation
  • Medical Complications

Background:

  • Subdural effusion is a frequent complication following decompressive craniectomy.
  • Understanding the formation mechanism of subdural effusion is crucial for effective treatment.

Purpose of the Study:

  • To observe the morphological structure of subdural effusion in skull defects using endoscopy.
  • To evaluate the efficacy of endoscopic-assisted surgery for treating subdural effusion.
  • To compare outcomes with non-endoscopic treatment methods.

Main Methods:

  • 19 patients with skull defects and subdural effusion underwent endoscopic-assisted surgery from January 2018 to March 2020.
  • Endoscopic visualization allowed observation of subdural effusion structures and surgical procedures.
  • A control group of 13 patients received non-endoscopic treatment for comparison.

Main Results:

  • Endoscopic analysis revealed subdural effusions consistently presented with capsular structures (outer wall, boundary, inner wall, fistula).
  • The inner wall showed neovascularization, indicating potential for new membrane formation.
  • Cerebrospinal fluid fistulas were identified in 31.6% of cases.
  • Endoscopic-assisted surgery led to a significant reduction in postoperative complications compared to the control group.

Conclusions:

  • Subdural effusion cavities can be classified into fistula, membrane, and closed types based on structural characteristics.
  • Endoscopic-assisted surgery with hemostasis gauze placement offers a novel and effective treatment for subdural effusion.
  • This technique demonstrably lowers the incidence of postoperative complications in patients with skull defects and subdural effusion.