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Related Experiment Videos

UBM-guided chamber angle surgery for glaucoma management: an experimental study.

T S Dietlein1, B F Engels, P C Jacobi

  • 1Department of Ophthalmology, University of Cologne, Joseph-Stelzmann-Strasse 9, 50931 Köln/Cologne, Germany. aia47@uni-koeln.de

Eye (London, England)
|May 2, 2003
PubMed
Summary

Ultrasound biomicroscopy (UBM) shows potential for guiding intraocular surgery instruments during chamber angle procedures. Further modifications are needed before UBM-guided surgery can be used clinically in humans.

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Area of Science:

  • Ophthalmology
  • Surgical Technology
  • Medical Imaging

Background:

  • Intraoperative control in chamber angle surgery often relies on gonioscopy or intraocular microendoscopy.
  • There is a need for advanced imaging techniques to enhance precision during minimally invasive ophthalmic procedures.

Purpose of the Study:

  • To evaluate ultrasound biomicroscopy (UBM) as an intraoperative guidance tool for chamber angle surgery.
  • To assess UBM's potential as an alternative or supplement to existing methods for real-time surgical control.

Main Methods:

  • The study utilized 15 porcine cadaver eyes for experimental procedures.
  • Mechanical goniopuncture and Er:YAG laser trabecular ablation were performed under real-time 50 MHz UBM monitoring.
  • Intraoperative instrument localization and tissue contact were qualitatively assessed without traditional visualization aids.

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Main Results:

  • Microsurgical instruments were clearly visualized within the chamber angle with minimal artifacts using UBM.
  • UBM effectively illustrated topographic localization, tissue contact, and penetration depth of instruments.
  • The technique's resolution was limited by the technical capabilities of the ultrasound biomicroscopy system.

Conclusions:

  • Ultrasound biomicroscopy (UBM) demonstrated feasibility for intraoperative monitoring of microsurgical instruments in ab interno procedures.
  • The presented UBM-guided technique requires further adaptation and refinement for potential clinical application in human patients.
  • UBM offers a promising avenue for enhancing precision and control in specific ophthalmic surgeries.