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Endocanalicular laser-assisted dacryocystorhinostomy. An anatomic study
1Department of Ophthalmology, Stanford (Calif) University School of Medicine.
Archives of Ophthalmology (Chicago, Ill. : 1960)
|October 1, 1992
Summary
This study demonstrates a novel endocanalicular laser technique for creating a fistula between the lacrimal sac and nose. This method offers potential advantages over traditional endonasal approaches for dacryocystorhinostomy.
Area of Science:
- Ophthalmology
- Otorhinolaryngology
- Medical Technology
Background:
- Dacryocystorhinostomy (DCR) is a surgical procedure to restore lacrimal drainage.
- Traditional endonasal DCR can involve nasal endoscopy and instrumentation.
- Laser-assisted DCR aims to improve surgical outcomes and reduce invasiveness.
Purpose of the Study:
- To evaluate the feasibility of an endocanalicular laser technique for creating a lacrimal sac-nasal fistula.
- To compare the endocanalicular laser approach with the endonasal laser-assisted DCR.
Main Methods:
- Human cadaver specimens were used.
- A blunt-tipped quartz fiberoptic (400-600 microns) was advanced through the canaliculus.
- Laser pulses (10 W for 0.1 sec) were applied to create a fistula between the nasolacrimal sac and nasal cavity.
Main Results:
- A 2.5 x 2.5-mm fistula was successfully created.
- The fistula was located anterior and inferior to the middle turbinate.
- The technique allows for fistula enlargement with additional laser pulses.
Conclusions:
- Endocanalicular laser-assisted DCR is a viable technique for fistula creation.
- Potential advantages include laser energy directed away from the eye and resemblance to standard nasolacrimal probing.
- Nasal endoscopy and instrumentation may not be necessary with this approach.