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A surgical handpiece having an ultrasonically driven tool operated by gas under pressure. A surgical handpiece useable for ophthalmic and other microsurgery uses a whistle for generating ultrasonic waves and causing a driving member to reciprocate at ultrasonic frequency. The handpiece has a probe w

A surgical handpiece having an ultrasonically driven tool operated by gas under pressure. A surgical handpiece useable for ophthalmic and other microsurgery uses a whistle for generating ultrasonic waves and causing a driving member to reciprocate at ultrasonic frequency. The handpiece has a probe with a needle or other tool reciprocable within the probe. Irrigation liquid can be supplied through the handpiece and through the probe, surrounding the tool to remove heat. The tool has a lumen, and the lumen is connected to a source of vacuum through the handpiece for aspiration of tissue fragmented by the reciprocating tool.

대표청구항 ▼

A pneumatically operated handpiece system for ophthalmic surgery, which comprises: a cylindrical body having a first end portion, a middle portion and a second end portion, said body defining an axial first bore within said first end portion, an axial middle bore within said middle portion, and a se

A pneumatically operated handpiece system for ophthalmic surgery, which comprises: a cylindrical body having a first end portion, a middle portion and a second end portion, said body defining an axial first bore within said first end portion, an axial middle bore within said middle portion, and a second axial bore within said second end portion, said bores having interconnections, said body further provided with a first body passageway extending from a first end at said first end portion of said body to a second end at said second end portion of said body, and with a second passageway having a first end communicating with said first bore and a second end at said second end portion of said body; a probe member being provided with a first end and an enlarged end, and defining a central axial passageway therethrough communicating with said first bore and said first body passageway, said enlarged end of said probe member being threadably received by said first end portion of said body and defining an interior volume communicating with said first end of said first body passageway; a tool driving member reciprocatably positioned within said first bore of said body, said tool driving member provided with an axial passageway; a tool reciprocally positioned within said axial passageway in said probe member, said tool having a first end threadably attached to said tool driving member and a second end defining a needle extending from said first end of said probe member, said tool provided with an axial lumen communicating with said passageway in said tool driving member; a cylindrical cup carrying member reciprocally positioned within said middle bore of said body, said cup carrying member provided with a centrally disposed cup recess in an end toward said second bore; a stem connecting said cup carrying member with said tool driving means, said stem passing through said interconnection between said first bore and said middle bore and provided with an axial passageway communicating with said axial passageway of said tool driving member and with said first bore, said stem transmitting movement of said cup carrying member to said tool driving member and to said tool; a centrally disposed sleeve within said second bore of said body and spaced from the inner wall of said second bore by web means thereby defining gas discharge passageways external to said sleeve, said sleeve provided with internal threads; a nozzle member mounted within said sleeve and having external threads cooperating with said threads of said sleeve to provide for axial adjustment of said nozzle member, said nozzle member having an axial passageway terminating at a first end toward said cup carrying member in a constricted orifice axially aligned with said cup, and at a second end with means for connecting said passageway of said nozzle member with a source of pressurized gas, said orifice being of a size to produce ultrasonic vibrations upon passage of gas from said source of pressurized gas, said orifice and said cup being of a selected size and spaced a selected distance to form an ultrasonic whistle whereby flow of said gas from said source of pressurized fluid establishes ultrasonic frequencies in said whistle thereby reciprocating said tool at ultrasonic frequencies; a source of vacuum; a source of liquid; and control means for selectively connecting said source of vacuum to said second end of said first body passageway for aspiration through said first bore, said passageway in said stem and in said tool driving member and said lumen of said tool, said control means also for selectively connecting said source of liquid to said second end of said second body passageway for irrigation through said volume within said probe member exterior to said tool, and said control means also for selectively connecting said source of pressurized gas to said second end of said passageway of said nozzle member for ultrasonic reciprocation of said tool.