Cataract removal technique

Details Cataract removal technique Cataract removal technique

1988-07-26

1990-03-13

Thaler, Michael H.

Surgery

Means for introducing or removing material from body for...

With means for cutting, scarifying, or vibrating tissue

604 28, 606166, A61B 1700

Patent

active

049080156

ABSTRACT:
To remove a cataract, a cannula is inserted through a plurality of layers of compacted material in the lens and fluid of between 1/500 and 1/100 of a milliliter is injected to separate the layers of the lens cortex and lens nucleus. These steps are repeated until the nucleus and cortex of the lens are decompacted at increasing penetrations until a compacted portion of the nucleus is reached which resists the insertion of a needle. An elongated tool is inserted through an incision into the capsular chamber and against the lens to cut the lens in a series of paths diverging from the incision and thus to break the lens into a series of wedge-shaped sections. The tool may have an ultrasonic vibrator mounted within its center, whereby the cutting action is aided.

REFERENCES:
patent: 3589363 (1971-06-01), Banko
patent: 3937222 (1976-02-01), Banko
patent: 4191176 (1980-03-01), Spina et al.

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