Impact of removal of the lateral orbital rim on intraorbital pressure during endoscopic trans-orbital approach (ETOA): a cadaveric study - Summary - MDSpire

Impact of removal of the lateral orbital rim on intraorbital pressure during endoscopic trans-orbital approach (ETOA): a cadaveric study

  • By

  • Antonio Strangio

  • Joel Davaine Ndongo Sonfack

  • Marc-Olivier Comeau

  • Guilherme Gago

  • Annie Moreau

  • Martìn Coté

  • Pierre-Olivier Champagne

  • December 20, 2025

  • 0 min

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Objective:

To evaluate the impact of lateral orbital rim (LOR) removal on intraorbital pressure during endoscopic trans-orbital approach (ETOA) and assess the extent of maximal bone removal, emphasizing the significance of understanding intraorbital pressure dynamics.

Key Findings:
  • LOR removal increased the working space during ETOA, which may enhance surgical outcomes.
  • Intraorbital pressure significantly increased with deeper retraction beyond 1.5 cm, indicating a risk for complications.
  • Monitoring IORP serves as a reliable surrogate for IOP in cadaveric models, providing valuable insights for surgical practice.
Interpretation:

The removal of the lateral orbital rim during ETOA may facilitate surgical access while potentially influencing intraorbital pressure dynamics, necessitating careful monitoring to mitigate risks.

Limitations:
  • Study conducted on cadaveric specimens, which may not fully replicate live human responses.
  • Limited sample size may affect the generalizability of the findings.
  • Variability in cadaveric specimens could impact the consistency of results.
Conclusion:

LOR removal during ETOA can enhance surgical access but requires careful management of intraorbital pressure to prevent complications, underscoring the importance of continuous monitoring.

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