Bausch-lomb Incorporated

Technolas Perfect Vision Gmbh

Toh Seng Goh

Brian D McCary

James Taylor Perkins

David Haydn Mordaunt

Frieder Loesel

Gerhard Youssefi

Matthew J Fitzgerald

Jochen Kandulla

Ala Moradian

Werner Banghard

David Hertweck

David W Hertweck

James T Perkins

Brian D Mccary

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

An ophthalmic surgical device includes a housing having a distal end and a proximal end. A cannula is attached to the housing distal end and has a distal tip with at least one port in communication with a lumen extending through the cannula and in communication with an aspiration path in the housing. A vibration source is held within the housing for vibrating the distal tip of the cannula for assisting in vitreous and other tissue removal from a patient's eye. The vibration source creates a peak velocity of the distal tip equal to or less than a potential maximum flow velocity of water through the at least one port for a pressure differential between an intraocular pressure of the eye and a pressure within the cannula lumen that is less than the intraocular pressure.

Vibrating surgical device for removal of vitreous and other tissue

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.

A system and method for performing a femto-fragmentation procedure on tissue in the crystalline lens of an eye requires that a laser beam be directed and focused to a focal point in the crystalline lens of the eye. The focal point is then guided, relative to an axis defined by the eye, to create a segment cluster by causing Laser Induced Optical Breakdown (LIOB) of tissue in the crystalline lens. The resultant segment cluster includes a plurality of contiguous, elongated segments in the crystalline lens that are individually tapered from an anterior end-area to a posterior end-area. Specifically, this is done to facilitate the removal of individual segments from the segment cluster in the crystalline lens.

System and method for femto-fragmentation of a crystalline lens

An ophthalmic surgical device () includes a housing () having a distal end () and a proximal end (). A cannula () is attached to the housing distal end () and has a distal tip () with at least one port () in communication with a lumen () extending through the cannula () and in communication with an aspiration path () in the housing (). A vibration source () is held within the housing () for vibrating the distal tip () for assisting in vitreous and other tissue removal. An aspiration source () connected to the aspiration path () for applying a negative pressure to the lumen () and the at least one port () for removing fluids and the vitreous and other tissue from the eye. The vibration source () and the aspiration source () together create a periodic bi-directional flow of tissue through the port () without creating cavitation externally of the distal tip ().

An ophthalmic surgical cassette for collecting aspirant fluid and/or tissue during an ophthalmic surgical procedure. The ophthalmic surgical cassette includes a rigid walled container having an interior volume for collecting aspirant fluid and/or tissue and an aspiration manifold coupled to the rigid walled container. The aspiration manifold is connected to an aspiration tube in fluidic communication with the interior volume, a first aspiration line for coupling a first surgical handpiece, a second aspiration line for coupling a second surgical handpiece, and a reflux bulb in fluidic communication with the first and second aspiration lines.

Growing community of inventors

Wildwood, MO, United States of America

Toh Seng Goh