Gas purging, eye fixation hand piece

Details Gas purging, eye fixation hand piece Gas purging, eye fixation hand piece

1989-09-15

1991-04-23

Rosenbaum, C. Fred

Surgery

Instruments

Corneal cutter or guide for corneal cutter

604294, A61F 900

Patent

active

050096605

ABSTRACT:
A gas purging, eye fixation hand piece (10) includes a vacuum ring (15) evacuated by a suction line (21) through a handle (20) via which a purging gas is delivered to an array of purging nozzles (36-38) aimed into the vacuum ring from around an inner perimeter of the vacuum ring to direct purging gas jets towards the proximal side (16) of vacuum ring (15) attached to an eye that is held steady in a reference position for laser surgery. A preferably disposable and resilieint eye-engaging ring (25) is removably mounted on the vacuum ring to engage the eye around the cornea, and a spring-biased suction release valve (24) is preferably mounted on hand piece handle (20) for finger operation by the surgeon to release hand piece (10) from the eye when surgery is completed. Mounting of gas purging nozzles (36-38) on the hand piece automatically positions them properly for keeping the cornea clear of particles formed by laser ablation of eye tissue, once hand piece (10) is properly fixed to the eye.

REFERENCES:
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patent: 4205682 (1980-06-01), Crock et al.
patent: 4503853 (1985-03-01), Ota et al.
patent: 4520815 (1985-06-01), Marinoff
patent: 4558698 (1985-12-01), O'Dell
patent: 4688570 (1987-08-01), Kramer et al.
patent: 4718418 (1988-01-01), L'Esperance, Jr.
patent: 4744362 (1988-05-01), Grundler
patent: 4750491 (1988-06-01), Kaufman et al.
patent: 4796623 (1989-01-01), Krasner et al.
patent: 4844060 (1989-07-01), Krumeich
patent: 4919129 (1990-04-01), Weber, Jr. et al.
Storz brochure, p. 266 showing item E9016, Thornton Fixation Ring.

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