Method for the joining of ocular tissues using laser light
Patent 5290272 Issued on March 1, 1994. Estimated Expiration Date: 
March 16, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
March 16, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3467099 3487835 3547125 Portable light coagulator Detachable laser optical fiber assembly and method of adjustment Laser endocoagulator apparatus Ophthalmic laser surgical method Apparatus for effecting anastomosis of tubular tissue by laser welding Probe-and-fire lasers Laser healing method InventorsAssigneeApplicationNo. 851822 filed on 03/16/1992US Classes:606/4, Ophthalmic128/898, Methods606/3, With particular wavelength606/6Cataracts or glaucomaExaminersPrimary: Pellegrino, Stephen C.Assistant: Peffley, Michael Attorney, Agent or FirmInternational ClassA61N 005/06AbstractAn effective method for welding corneal and/or scleral tissues. To join the tissues, laser light is applied using a wavelength which enables penetration of the light to a tissue depth of about 0.2-2.0 mm. The wavelength is selected from within one of the following ranges: (1) 1400-1900 nm, or (2) 2100-2400 nm. In epikeratophakia procedures, the wavelength ranges will be 1900-2100 nm or 2400-2650 nm, allowing a tissue penetration depth of about 0.05-0.2 mm. A laser power output value is selected so that the tissue temperature during welding remains at about 44°-60° C. This value is between about 30 mW-1.5 W. The laser light may be applied in the form of a spot-type beam, an elongate beam, or an annular beam. Application of laser light in the foregoing manner enables ocular tissues to be safely and effectively welded, and is useful in corneal transplantation.Other References
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