News Column

Patent Issued for Dynamic Optical Surgical System Utilizing a Fixed Relationship between Target Tissue Visualization and Beam Delivery

July 23, 2014



By a News Reporter-Staff News Editor at Biotech Week -- A patent by the inventors Andersen, Dan (Menlo Park, CA); Angeley, David G. (Charlottesville, VA), filed on April 25, 2007, was published online on July 8, 2014, according to news reporting originating from Alexandria, Virginia, by NewsRx correspondents (see also Topcon Medical Laser Systems, Inc.).

Patent number 8771261 is assigned to Topcon Medical Laser Systems, Inc. (Santa Clara, CA).

The following quote was obtained by the news editors from the background information supplied by the inventors: "Photocoagulation procedures for treating retinal tears, diabetic retinopathy and other retinal disorders are well known in the art. A well known slit lamp microscope configuration has been used to provide the visualization and base for such procedures.

"Traditional ophthalmic surgical laser systems include a laser source that connects to a slit lamp-mounted delivery device via an optical fiber. The treatment often times is implemented using a visible aiming beam that individually marks the location at which the laser spot will impinge the target tissue. There are usually about 1500 laser pulses delivered in a standard pan retinal photocoagulation procedure, often totaling over 90 minutes of treatment across multiple sessions. Each of these laser pulses is activated by a depression of footswitch, and the parameters of the delivered laser pulse are controlled by a control panel. This single-shot 'step and repeat' approach is time consuming, fatiguing, tedious, and uncomfortable for both the physician and patient.

"Other attempts to improve the safety and speed of laser surgery have been proposed. These approaches require that the underlying laser system be inordinately complicated. For example, the simultaneous multiple spot delivery devices described in U.S. Pat. Nos. 5,921,981, 6,066,128 and 6,096,028 must employ a laser system capable of producing output powers considerably greater than those of a single spot system. This increase in laser power introduces additional and considerable expense, and raises possible safety concerns.

"Similarly, in order to increase the speed of the manual procedure, the approach described in Intl. Pub. No. WO 2005/065116 A2 utilizes a single beam that is scanned using scanning optics to create a pattern of sequential therapeutic laser spots first represented by an aiming beam. The scanning of a single spot in the arrangement of a pattern allows the use of a lower power laser beam and source. In order to assure that the size and shape of the patterns of spots produced by both the aiming and therapeutic beams are identical, this device employs elaborate pattern sensing and associated feedback systems. While providing a means for improving laser surgery, it also increases the system cost and complexity. Moreover, there is no deliberate correlation between the physician's visual field of view through the microscope and the patterns of spots produced by the system.

"Accordingly, there is a need for a safe, cost effective, adaptable and time-efficient approach to laser surgery that produces a pattern of treatment light that is reliably generated and that is closely linked to the physician's field of view."

In addition to the background information obtained for this patent, NewsRx journalists also obtained the inventors' summary information for this patent: "The present invention solves the aforementioned problems by providing a surgical device and method for translating an optical beam on target tissue in a predetermined pattern, while simultaneously moving the physician's field of view of the target tissue.

"The surgical device for treating target tissue includes a light source for generating a treatment beam of light, an optical element for directing the treatment beam onto target tissue, a plurality of optical elements for generating an image of the target tissue from light emanating from the target tissue, a translation device for translating at least one of the light source, the optical element and the plurality of optical elements relative to the target tissue to simultaneously move the treatment beam along the target tissue and a field of view of the target tissue defined by the plurality of optical elements, and control electronics for controlling the translation device to cause the treatment beam to move along the target tissue in a predetermined pattern.

"In an additional aspect, the surgical device for treating target tissue includes a light source for generating a treatment beam of light, a plurality of optical elements for generating an image of the target tissue from light emanating from the target tissue, a translation device for translating the light source and the plurality of optical elements relative to the target tissue to simultaneously move the treatment beam along the target tissue and a field of view of the target tissue defined by the plurality of optical elements, and control electronics for controlling the translation device to cause the treatment beam to move along the target tissue in a predetermined pattern.

"The method of treating target tissue includes generating a treatment beam of light using a light source, directing the treatment beam onto target tissue using an optical element, generating an image of the target tissue from light emanating from the target tissue using a plurality of optical elements, and translating at least one of the light source, the optical element and the plurality of optical elements relative to the target tissue to simultaneously move the treatment beam along the target tissue and a field of view of the target tissue defined by the plurality of optical elements, and to cause the treatment beam to move along the target tissue in a predetermined pattern.

"In another aspect, the method for treating target tissue includes generating a treatment beam of light using a light source, generating an image of the target tissue from light emanating from the target tissue using a plurality of optical elements, and translating the light source and the plurality of optical elements relative to the target tissue to simultaneously move the treatment beam along the target tissue and a field of view of the target tissue defined by the plurality of optical elements, and to cause the treatment beam to move along the target tissue in a predetermined pattern.

"Other objects and features of the present invention will become apparent by a review of the specification, claims and appended figures."

URL and more information on this patent, see: Andersen, Dan; Angeley, David G.. Dynamic Optical Surgical System Utilizing a Fixed Relationship between Target Tissue Visualization and Beam Delivery. U.S. Patent Number 8771261, filed April 25, 2007, and published online on July 8, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8771261.PN.&OS=PN/8771261RS=PN/8771261

Keywords for this news article include: Biotechnology, Biomedical, Surgery, Electronics, Medical Devices, Surgical System, Photocoagulation, Surgical Technology, Topcon Medical Laser Systems Inc.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Biotech Week


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