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A novel multipurpose modular mini-endoscope for otology.

Alessandro Bozzato1, Victoria Bozzato, Basel Al Kadah

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A new modular mini ear endoscope (MMEE) offers minimal invasive transtympanic access to the round window membrane (RWM) for drug delivery. This optical fiber endoscope demonstrated effective visualization and access, even with obstructions, in cadaver studies.

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Area of Science:

  • Otology
  • Minimally Invasive Surgery
  • Medical Device Development

Background:

  • Transtympanic access to the round window membrane (RWM) is crucial for otologic drug delivery.
  • Development of specialized endoscopes is needed for visualization and instrument manipulation.
  • Sterilization challenges exist for small-diameter endoscopes with working channels.

Purpose of the Study:

  • To evaluate a new multi-purpose modular semi-rigid optical fiber endoscope for minimally invasive middle ear endoscopy.
  • To assess the endoscope's efficacy in accessing the round window membrane (RWM) using micro instruments.
  • To compare endoscopic visualization with traditional microscopic methods.

Main Methods:

  • Evaluation of a 10,000-pixel resolution modular mini ear endoscope (MMEE) in 12 human cadaver specimens.
  • Focus on transtympanic access to the RWM and use of micro instruments.
  • Comparison of visualization quality and access success rates between endoscopy and microscopy.

Main Results:

  • The MMEE successfully visualized the RWM directly in 3 specimens and after mucous membrane removal in 8 specimens.
  • A bony overhang obstructed RWM visualization in one case.
  • Endoscopic access to the RWM was initially more successful than with microscopic investigation, especially in obstructed niches.

Conclusions:

  • The developed MMEE is suitable for minimally invasive transtympanic access to the RWM, even with obstructions.
  • The modular design offers versatility for various indications and instruments, addressing sterilization concerns.
  • Further clinical studies in humans are required to establish the endoscope's role in otology.