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Related Experiment Videos

A flexible infusion micro-cannula for subretinal surgery

A Loewenstein1, R S Rader, T H Shelley

  • 1Johns Hopkins Microsurgery Advanced Design Laboratory (MADLAB), Wilmer Ophthalmological Institute, Johns Hopkins Hospital, Baltimore, MD 21287, USA.

Ophthalmic Surgery and Lasers
|September 26, 1997
PubMed
Summary

A new flexible micro-cannula enables safe and precise subretinal injections for treating conditions like age-related macular degeneration. This tool minimizes retinal trauma during submacular drug delivery and fluid infusion.

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Area of Science:

  • Ophthalmology
  • Retinal Surgery
  • Medical Device Development

Background:

  • Subretinal injections are crucial for treating various retinal diseases.
  • Current methods may pose risks of retinal trauma during fluid or drug delivery.

Purpose of the Study:

  • To introduce a novel flexible micro-cannula designed for atraumatic subretinal surgery.
  • To evaluate the safety and efficacy of this micro-cannula in submacular injections.

Main Methods:

  • Development of a flexible micro-cannula with a 200-micron diameter, increased length, and buckling-resistant material.
  • Application of the micro-cannula in 14 patients undergoing pars plana vitrectomy for subfoveal choroidal neovascularization.

Main Results:

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  • The micro-cannula facilitated atraumatic retinotomy and efficient, controlled subretinal fluid injection.
  • Successful use in patients with age-related macular degeneration and angioid streaks.

    • Conclusions:

    • The developed flexible micro-cannula is a valuable tool for subretinal fluid and drug infusion.
    • It offers a safer and more controlled approach to subretinal surgery.