Bausch-lomb Incorporated

Matthew J Fitzgerald

James Taylor Perkins

Laurence J Cull

Brian D McCary

Toh Seng Goh

Ala Moradian

Merlin Hall

Robert Doyle

Michael Versemann

A phacoemulsification transducer assembly includes a reflector and a driver connected to the reflector. The driver has a known driver vibration frequency range. A horn is connected to the driver opposite the reflector. A needle is connected to the horn opposite the driver. The needle has a known free shaft length. To maximize a desired stroke length of the needle for a minimal amount of power applied to the driver, a material forming the needle is chosen such that a speed of sound through the material results in a quarter-wavelength distance at the driver vibration frequency range substantially equal to the needle free shaft length.

Ultrasonic needles and transducer assemblies formed of non-metal materials or a combination of materials

A phacoemulsification needle includes a hub for connection to an ultrasonic handpiece. An elongated shaft is formed with the hub and extends from the hub. A distal end of the shaft breaks-up tissue when the distal end is caused to be vibrated by the handpiece. At least a distal portion of the shaft is formed of a material that has properties providing advantages compared to a metal needle. Example properties include a substantially lower density, a substantially higher electrical resistivity, a substantially lower thermal conductivity, a substantially lower mechanical lateral stiffness, a substantially higher efficiency of converting electrical energy powering the handpiece into motion of the distal end, a substantially lower acoustical impedance, a substantially higher Poisson's ratio, and a substantially higher mechanical gain.

An ophthalmic surgery kit includes a priming vessel defining a reservoir for holding a fluid, an auxiliary aspiration channel, an irrigation channel, a handpiece channel, and an ophthalmic surgical handpiece retained by the handpiece channel. The ophthalmic surgical handpiece includes a tip disposed within the reservoir. An auxiliary aspiration tuberetained by the auxiliary aspiration channel with a first end disposed within the reservoir. An irrigation tube first end is retained by the irrigation channel within the reservoir.

Ophthalmic surgery kits for priming tubes for ophthalmic surgical procedures

An aspiration flow resistorincludes an inletand an outlet. A housingis connected to the inletand outlet. A series of spaced wallsare disposed between the inletand the outlet. The wallsand the inletand the outlettogether with the housingdefine a plurality of aspiration flow chambers. As aspirant flows from the inletto the outlet, a pressure decrease in the aspirant flow occurs at each wallto provide resistance to aspirant flow.

Aspiration flow resistor

A fluid flow resistor for use in ophthalmic surgery includes a housing having an inlet and an outlet . An elongated turbine is caused to spin within the housing by a flow of fluid which extracts energy from the fluid flow and effectively increases a resistance to fluid flow from the inlet to the outlet

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St. Louis, MO, United States of America

Matthew J Fitzgerald