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Newly Designed Universal Trans-punctal Rigid Lacrimal Microendoscope
Masashi Mimura1,2,3, Audrey C Ko1,4, Ramzi M Alameddine1,5
1Department of Ophthalmology, Division of Oculofacial Plastic and Reconstructive Surgery, Shiley Eye Institute, University of California San Diego, La Jolla, California, U.S.A.
Ophthalmic Plastic and Reconstructive Surgery
|April 7, 2020
Summary
A novel double-angled lacrimal microendoscope offers universal application for examining the lacrimal drainage system. This 2-bend design overcomes anatomical variations, improving diagnostic success in nasolacrimal duct obstruction cases.
Area of Science:
- Ophthalmology
- Medical Device Engineering
Background:
- Lacrimal drainage system examination is crucial for diagnosing nasolacrimal duct obstruction.
- Conventional microendoscopes face limitations due to anatomical variations.
Purpose of the Study:
- To develop and evaluate a universal trans-punctal lacrimal microendoscope.
- To assess the clinical efficacy of a novel 2-bend design compared to a single-bend type.
Main Methods:
- An original 2-bend (double-angle) rigid lacrimal microendoscope was designed.
- Cadaveric evaluation of 6 lacrimal systems (Caucasian and Asian).
- Prospective clinical study of 45 Japanese patients with nasolacrimal duct obstruction.
Main Results:
- The 2-bend microendoscope facilitated insertion and imaging in all cadaveric lacrimal systems.
- Conventional single-bend scopes struggled with prominent nasal frontal bone anatomy.
- Clinical trial: 26.7% of systems were impassable with single-bend scopes, versus 0% with the 2-bend design.
Conclusions:
- The 2-bend microendoscope design is effective for universal lacrimal passage examination.
- This innovative scope enhances diagnostic capabilities for nasolacrimal duct obstruction.
- The device demonstrates value in evaluating diverse lacrimal system anatomies.
