Surgery – Instruments – Light application
Patent
1992-03-16
1994-03-01
Pellegrino, Stephen C.
Surgery
Instruments
Light application
606 3, 606 6, 128898, A61N 506
Patent
active
052902722
ABSTRACT:
An 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.degree.-60.degree. 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.
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Burstein Neal I.
Jeffers William Q.
Nowicki Michael J.
Williams, Sr. John M.
Helios Inc.
Malkin Jay K.
Peffley Mike
Pellegrino Stephen C.
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