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September 1973

Aspiration Method of a Hard Cataract: Ultrasonic Vibration.

Arch Ophthalmol. 1973;90(3):260. doi:10.1001/archopht.1973.01000050262017

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This monograph presents a thorough review of the author's background experimental work and present operative technique for cataract removal with an ultrasonic phacoemulsification and aspiration technique. The book outline follows his comprehensive and orderly sequence of investigations. He describes the physics of ultrasonic energy as a means of pulverizing the lens, studies its effects on adjacent ocular tissues, and explores its clinical use.

In the experiments, a vibrating ultrasonic probe is inserted directly into the lens substance where a concentrated cavitation effect is created by the energy. Mechanical vibration characteristics of various tip designs are documented, the best effect being obtained using an L-shaped probe with a protective silicone coating. Aspiration of lens material occurs spontaneously through the hollow probe and is augmented by a manually operated pump. Using the probe in rabbit eyes, the author observed transient corneal edema, hyphema, fibrinous exudate, and permanent iris depigmentation in some areas.

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