Excimer laser phototherapy for the dissolution of abnormal growth
Patent 4686979 Issued on August 18, 1987. Estimated Expiration Date: 
February 19, 2005. 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.
February 19, 2005. 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 3858577 Laser tunnelling device Fiber optic light delivery apparatus and medical instrument utilizing same Endoscopic apparatus with a laser light conductor Control for laser hemangioma treatment system Endoscopic laser coagulator Apparatus for and method of utilizing energy to excise pathological tissue Patent #: 4469098 InventorsAssigneeApplicationNo. 06/702569 filed on 02/19/1985US Classes:606/3, With particular wavelength606/15, With optical fiber606/39, Cutting606/4, Ophthalmic606/7AngioplastyExaminersPrimary: Coven, Edward M.Attorney, Agent or FirmInternational ClassesA61B 18/20 (20060101)A61B 18/24 (20060101) G02B 6/42 (20060101) A61F 9/007 (20060101) A61F 9/011 (20060101) A61B 17/00 (20060101) AbstractRemoval of abnormal human tissue with reduced thermal damage is achieved by selecting a laser having a wavelength in the order of 290-400 nm, orienting a laser-transmitting glass member toward the abnormal tissue and directing the laser through the glass member at power densities, pulse rates, and times sufficient to cause multiphoton absorption and bond breaking by Coulomb repulsion rather than thermal destruction. The glass member may include a laser beam concentrator provided by a lens or cone at the tissue-treatment end to increase the beam energy per unit area and reduce the treatment area.Other References
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