Apparatus for controlling the photocoagulation of biological tissue
Patent 4719912 Issued on January 19, 1988. Estimated Expiration Date: 
May 26, 2007. 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.
May 26, 2007. 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 3181351 3689159 3720213 3795784 4091814 Infrared laser photocautery device Eye fundus camera Laser beam error correcting process Load current pulse control devices Laser therapy apparatus InventorAssigneeApplicationNo. 07/057692 filed on 05/26/1987US Classes:606/4, Ophthalmic219/121.61Beam energy controlExaminersPrimary: Howell, Kyle L.Assistant: Hindenburg, Max Attorney, Agent or FirmInternational ClassesA61F 9/007 (20060101)A61F 9/008 (20060101) A61B 18/20 (20060101) A61B 17/00 (20060101) Foreign Application Priority Data1983-02-28 DEAbstractApparatus to control the extent of photocoagulation of the retina wherein light reflected from discrete portions (Ti) of the retina (75) in the eye is projected by a lens system (82) to individual photodiodes (D1) in an array (85) to generate electrical signals related to the light intensity reflected from a corresponding portion (Ti) on the retina (75) being treated. A change in the reflectance of any discrete portion (Ti) of an area on the retina relative to the reflectance of any discrete portion of the area on the retina actuates a control mechanism associated with laser (22). Upon a change to a threshold reflectance or a maximum rate of change in reflectance, a control apparatus (90) automatically adjusts parameters of treatment including power (22), focus (25) or sighting (102, 104). | |
