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Irrigation, aspiration, and polishing cannula.
1St. John's Eye Hospital, University of the Witwatersrand, Johannesburg, South Africa.
Journal of Cataract and Refractive Surgery
|January 1, 1991
Summary
Modified irrigation/aspiration cannulas improve cataract surgery. Enlarging the aspiration port and adding a capsule polisher enhance lens cortex removal and reduce complications during extracapsular cataract surgery.
Area of Science:
- Ophthalmology
- Surgical Instrumentation
- Cataract Surgery
Background:
- Extracapsular cataract surgery involves lens cortex aspiration and capsule polishing.
- The Simcoe irrigation/aspiration cannula is a widely used instrument.
Purpose of the Study:
- To describe modifications to the Simcoe irrigation/aspiration cannula.
- To improve efficiency and reduce complications in cataract surgery.
Main Methods:
- Enlarging the aspiration port diameter from 0.3 mm to 0.4 mm.
- Altering the cannula's terminal segment into a sandblasted capsule polisher.
Main Results:
- The 0.4 mm aspiration port reduces capsular entrapment.
- Enhanced aspiration of varied cortex textures is achieved.
- Simultaneous lens material aspiration and capsular cleanup are enabled, eliminating the need for a separate polisher.
Conclusions:
- Modified irrigation/aspiration cannulas offer significant advantages in cataract surgery.
- These modifications are compatible with both manual and machine-operated systems.