Surgery – Instruments – Means for concretion removal
Patent
1991-07-22
1992-08-18
Hafer, Robert A.
Surgery
Instruments
Means for concretion removal
606107, 606128, A61M 2506
Patent
active
051395045
ABSTRACT:
A wedge-shaped probe for the removal of cataractous tissue from within the eye is provided. The wedge-shaped probe has polished distalmost edges so that there are no sharp edges and hence the risk of damage to the cornea, iris or posterior capsule when the probe is used is minimized. Furthermore, the sloped-shape of the probe tip permits effective scooping of cataract material within the eye. Likewise the wedge shape efficiently lifts cortical material off the posterior capsule and is useful for posterior capsule clean-up. The probe can also be used to remove soft cataract material without using ultrasound. Preferably, when the instrument is used for that purpose, a movable spatula element is mounted to the probe and its associated handpiece for crushing and removing material which becomes lodged in the aspiration opening. When operatively coupled to a source of ultrasonic energy, the probe can be used for phacoemulsification of cataract tissue whether or not a spatula is provided. The probe of the invention is further characterized in that a small bore aspiration port is defined in the distalmost sloped end face. By decreasing the aspiration port size, higher aspiration levels can be used to draw cataract material to the tip and to obtain a good emulsification action. A laser may be used to soften the cataractous tissue prior to removal with the wedge-tipped probe.
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Hafer Robert A.
Ophthalmocare, Inc.
Rimell Sam
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