Patents by Inventor Ronald A. Underwood

Ronald A. Underwood has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7678069
    Abstract: Systems and methods are provided for applying a high frequency voltage in the presence of an electrically conductive fluid to create a relatively low-temperature plasma for ablation of tissue adjacent to, or in contact with, the plasma. In one embodiment, an electrosurgical probe or catheter is positioned adjacent the target site so that one or more active electrode(s) are brought into contact with, or close proximity to, a target tissue in the presence of electrically conductive fluid. High frequency voltage is then applied between the electrode terminal(s) and one or more return electrode(s) to generate a plasma adjacent to the active electrode(s), and to volumetrically remove or ablate at least a portion of the target tissue. The high frequency voltage generates electric fields around the active electrode(s) with sufficient energy to ionize the conductive fluid adjacent to the active electrode(s).
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: March 16, 2010
    Assignee: ArthroCare Corporation
    Inventors: Michael A. Baker, Stephen M. Brunell, Jean Woloszko, Ronald A. Underwood, Hira V. Thapliyal, Philip E. Eggers
  • Patent number: 7491200
    Abstract: A method for treating obstructive sleep disorders includes accessing the interior of the tongue through a sublingual incision; advancing an instrument through the incision into the interior of the tongue; and instantaneously removing an amount of tissue from the interior of the base of the tongue with the instrument. The present invention includes forming a cavity or plurality of channels in the tongue. The cavity may be collapsed using a suture, fastener or bioadhesive. An emplaced suture may be provided to hold the cavity in a collapsed position thereby reducing the degree of obstruction. Additionally, thermal energy may be applied to the tissue surface immediately surrounding the channels to cause thermal damage to the tissue surface, thereby creating hemostasis and stiffening the surrounding tissue structure.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: February 17, 2009
    Assignee: ArthroCare Corporation
    Inventor: Ronald A. Underwood
  • Patent number: 7449021
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to contract collagen fibers within the tissue structures. In one aspect of the invention, a system and method is provided for treating herniated or swollen discs within a patient's spine by applying sufficient electrical energy to the disc tissue to contract or shrink the collagen fibers within the nucleus pulposis. This causes the pulposis to shrink and withdraw from its impingement on the spinal nerve.
    Type: Grant
    Filed: April 25, 2005
    Date of Patent: November 11, 2008
    Assignee: ArthroCare Corporation
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Patent number: 7429260
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to contract collagen fibers within the tissue structures. In one aspect of the invention, a system and method is provided for treating herniated or swollen discs within a patient's spine by applying sufficient electrical energy to the disc tissue to contract or shrink the collagen fibers within the nucleus pulposis. This causes the pulposis to shrink and withdraw from its impingement on the spinal nerve.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: September 30, 2008
    Assignee: ArthroCare Corporation
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Publication number: 20070112346
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to contract collagen fibers within the tissue structures. In one aspect of the invention, a system and method is provided for treating herniated or swollen discs within a patient's spine by applying sufficient electrical energy to the disc tissue to contract or shrink the collagen fibers within the nucleus pulposis. This causes the pulposis to shrink and withdraw from its impingement on the spinal nerve.
    Type: Application
    Filed: December 19, 2006
    Publication date: May 17, 2007
    Applicant: ArthroCare Corporation
    Inventors: Ronald Underwood, Terry Davison, Hira Thapliyal, Philip Eggers
  • Patent number: 7090672
    Abstract: A method for treating obstructive sleep disorders includes accessing the interior of the tongue through an incision made in the skin in the vicinity of the jaw of a patient; advancing an instrument through the incision into the interior of the tongue; and removing an amount of tissue from the interior of the base of the tongue with the instrument. The present invention includes forming a cavity or plurality of channels in the tongue. The cavity may be collapsed using a suture, fastener or bioadhesive. An emplaced suture may be provided to hold the cavity in a collapsed position thereby reducing the degree of obstruction. Additionally, thermal energy may be applied to the tissue surface immediately surrounding the channels to cause thermal damage to the tissue surface, thereby creating hemostasis and stiffening the surrounding tissue structure.
    Type: Grant
    Filed: July 2, 2003
    Date of Patent: August 15, 2006
    Assignee: Arthrocare Corporation
    Inventors: Ronald A. Underwood, Maria B. Ellsberry
  • Publication number: 20050234439
    Abstract: A method for treating obstructive sleep disorders includes accessing the interior of the tongue through a sublingual incision; advancing an instrument through the incision into the interior of the tongue; and instantaneously removing an amount of tissue from the interior of the base of the tongue with the instrument. The present invention includes forming a cavity or plurality of channels in the tongue. The cavity may be collapsed using a suture, fastener or bioadhesive. An emplaced suture may be provided to hold the cavity in a collapsed position thereby reducing the degree of obstruction. Additionally, thermal energy may be applied to the tissue surface immediately surrounding the channels to cause thermal damage to the tissue surface, thereby creating hemostasis and stiffening the surrounding tissue structure.
    Type: Application
    Filed: March 25, 2005
    Publication date: October 20, 2005
    Applicant: ArthroCare Corporation
    Inventor: Ronald Underwood
  • Publication number: 20050187543
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to contract collagen fibers within the tissue structures. In one aspect of the invention, a system and method is provided for treating herniated or swollen discs within a patient's spine by applying sufficient electrical energy to the disc tissue to contract or shrink the collagen fibers within the nucleus pulposis. This causes the pulposis to shrink and withdraw from its impingement on the spinal nerve.
    Type: Application
    Filed: April 25, 2005
    Publication date: August 25, 2005
    Applicant: ArthroCare Corporation
    Inventors: Ronald Underwood, Terry Davison, Hira Thapliyal, Philip Eggers
  • Patent number: 6929640
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to contract collagen fibers within the tissue structures. In one aspect of the invention, a system and method is provided for treating herniated or swollen discs within a patient's spine by applying sufficient electrical energy to the disc tissue to contract or shrink the collagen fibers within the nucleus pulposis. This causes the pulposis to shrink and withdraw from its impingement on the spinal nerve.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: August 16, 2005
    Assignee: Arthrocare Corporation
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Patent number: 6896672
    Abstract: Systems and methods are provided for removing fatty tissue underlying a patient's epidermis (e.g., blepharoplasty, brow lifts, eyelid shortening procedures, and the like). These methods include positioning one or more active electrode(s) and one or more return electrode(s) in close proximity to a target site on an external body surface of the patient. A high frequency voltage difference is applied between the active and return electrode(s), and the active electrode(s) are translated across the external body surface to create an incision therein. The bipolar configuration controls the flow of current to within and around the distal end of the probe, which minimizes tissue necrosis and the conduction of current through unwanted paths in the patient. The residual heat from the electrical energy also provides simultaneous hemostasis of severed blood vessels, which increases visualization and improves recovery time for the patient.
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: May 24, 2005
    Assignee: Arthrocare Corporation
    Inventors: Andrew R. Eggers, Philip E. Eggers, Ronald A. Underwood, Stephen M. Brunell, Hira V. Thapliyal
  • Patent number: 6766202
    Abstract: The present invention provides systems, apparatus and methods for selective applying energy to a patient's dermis tissue to generate the growth of new collagen in this tissue, while minimizing the effect on the outer epidermis layer, thereby minimizing or suppressing the wound healing phase of the procedure. In one aspect of the invention, a method includes positioning a first electrode adjacent to, or in contact with, a region on or within a patient's skin, and applying a sufficient high frequency voltage between the first electrode and a second electrode to create a heat injury to a target tissue within the patient's dermis layer without ablating the epidermis layer overlying the target tissue. Typically, the voltage applied to the first and second electrodes is sufficient to induce heating of the dermis layer to about 60°-80° C., preferably about 65°-75° C.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: July 20, 2004
    Assignee: ArthroCare Corp.
    Inventors: Ronald A. Underwood, Jean Woloszko
  • Patent number: 6719754
    Abstract: Systems and methods are provided for removing adipose or fatty tissue underlying a patient's epidermis is disclosed (e.g., liposuction, abdominoplasty, and the like). The method includes positioning one or more active electrode(s) and one or more return electrode(s) in close proximity to a target region of fatty tissue. A high frequency voltage difference is applied between the active and return electrodes, and the fatty tissue or fragments of the fatty tissue are aspirated from the target region. The high frequency voltage either softens the fatty tissue or completely removes at least a portion of the tissue. In both embodiments, the remaining fatty tissue is more readily detached from the adjacent tissue in the absence of energy, and less mechanical force is required for removal. The bipolar configuration of the present invention controls the flow of current to the immediate region around the distal end of the probe, which minimizes tissue necrosis and the conduction of current through the patient.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: April 13, 2004
    Assignee: ArthroCare Corporation
    Inventors: Ronald A. Underwood, Stephen M. Brunell, Michael A. Baker, Hira V. Thapliyal, Philip E. Eggers
  • Patent number: 6712811
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within of a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to remove, contract or otherwise modify the structure of tissue structures. In one aspect of the invention, a method is provided for treating herniated discs within a patient's spine by applying sufficient electrical energy to the disc tissue to reduce a volume of the disc, thereby relieving pressure on a spinal nerve. In one embodiment, the high frequency voltage is sufficient to ablate a portion of the nucleus pulposis, either the extruded portion outside of the annulus or a portion or all of the pulposis within the annulus.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: March 30, 2004
    Assignee: Arthrocare Corporation
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Publication number: 20040006339
    Abstract: A method for treating obstructive sleep disorders includes accessing the interior of the tongue through an incision made in the skin in the vicinity of the jaw of a patient; advancing an instrument through the incision into the interior of the tongue; and removing an amount of tissue from the interior of the base of the tongue with the instrument. The present invention includes forming a cavity or plurality of channels in the tongue. The cavity may be collapsed using a suture, fastener or bioadhesive. An emplaced suture may be provided to hold the cavity in a collapsed position thereby reducing the degree of obstruction. Additionally, thermal energy may be applied to the tissue surface immediately surrounding the channels to cause thermal damage to the tissue surface, thereby creating hemostasis and stiffening the surrounding tissue structure.
    Type: Application
    Filed: July 2, 2003
    Publication date: January 8, 2004
    Applicant: ArthroCare Corporation
    Inventors: Ronald A. Underwood, Maria B. Ellsberry
  • Publication number: 20030212396
    Abstract: Systems and methods are provided for removing fatty tissue underlying a patient's epidermis (e.g., blepharoplasty, brow lifts, eyelid shortening procedures, and the like). These methods include positioning one or more active electrode(s) and one or more return electrode(s) in close proximity to a target site on an external body surface of the patient. A high frequency voltage difference is applied between the active and return electrode(s), and the active electrode(s) are translated across the external body surface to create an incision therein. The bipolar configuration controls the flow of current to within and around the distal end of the probe, which minimizes tissue necrosis and the conduction of current through unwanted paths in the patient. The residual heat from the electrical energy also provides simultaneous hemostasis of severed blood vessels, which increases visualization and improves recovery time for the patient.
    Type: Application
    Filed: March 14, 2003
    Publication date: November 13, 2003
    Applicant: ArthroCare Corporation
    Inventors: Andrew R. Eggers, Philip E. Eggers, Ronald A. Underwood, Stephen M. Brunell, Hira V. Thapliyal
  • Patent number: 6620155
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to contract collagen fibers within the tissue structures. In one aspect of the invention, a system and method is provided for treating herniated or swollen discs within a patient's spine by applying sufficient electrical energy to the disc tissue to contract or shrink the collagen fibers within the nucleus pulposis. This causes the pulposis to shrink and withdraw from its impingement on the spinal nerve.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: September 16, 2003
    Assignee: Arthrocare Corp.
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Patent number: 6540741
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within of a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to remove, contract or otherwise modify the structure of tissue structures. In one aspect of the invention, a method is provided for treating herniated discs within a patient's spine by applying sufficient electrical energy to the disc tissue to reduce a volume of the disc, thereby relieving pressure on a spinal nerve. In one embodiment, the high frequency voltage is sufficient to ablate a portion of the nucleus pulposis, either the extruded portion outside of the annulus or a portion or all of the pulposis within the annulus.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: April 1, 2003
    Assignee: Arthrocare Corporation
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Publication number: 20030040742
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within of a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to remove, contract or otherwise modify the structure of tissue structures. In one aspect of the invention, a method is provided for treating herniated discs within a patient's spine by applying sufficient electrical energy to the disc tissue to reduce a volume of the disc, thereby relieving pressure on a spinal nerve. In one embodiment, the high frequency voltage is sufficient to ablate a portion of the nucleus pulposis, either the extruded portion outside of the annulus or a portion or all of the pulposis within the annulus.
    Type: Application
    Filed: September 30, 2002
    Publication date: February 27, 2003
    Applicant: ArthroCare Corporation
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Patent number: 6500173
    Abstract: The present invention provides systems and methods for selectively applying electrical energy to a target location within of a patient's body, particularly including tissue in the spine. The present invention applies high frequency (RF) electrical energy to one or more electrode terminals in the presence of electrically conductive fluid to remove, contract or otherwise modify the structure of tissue structures. In one aspect of the invention, a method is provided for treating herniated discs within a patient's spine by applying sufficient electrical energy to the disc tissue to reduce a volume of the disc, thereby relieving pressure on a spinal nerve. In one embodiment, the high frequency voltage is sufficient to ablate a portion of the nucleus pulposis, either the extruded portion outside of the annulus or a portion or all of the pulposis within the annulus.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: December 31, 2002
    Inventors: Ronald A. Underwood, Terry S. Davison, Hira V. Thapliyal, Philip E. Eggers
  • Publication number: 20020193789
    Abstract: Systems and methods are provided for removing adipose or fatty tissue underlying a patient's epidermis is disclosed (e.g., liposuction, abdominoplasty, and the like). The method includes positioning one or more active electrode(s) and one or more return electrode(s) in close proximity to a target region of fatty tissue. A high frequency voltage difference is applied between the active and return electrodes, and the fatty tissue or fragments of the fatty tissue are aspirated from the target region. The high frequency voltage either softens the fatty tissue or completely removes at least a portion of the tissue. In both embodiments, the remaining fatty tissue is more readily detached from the adjacent tissue in the absence of energy, and less mechanical force is required for removal. The bipolar configuration of the present invention controls the flow of current to the immediate region around the distal end of the probe, which minimizes tissue necrosis and the conduction of current through the patient.
    Type: Application
    Filed: April 10, 2002
    Publication date: December 19, 2002
    Applicant: ArthroCare Corporation
    Inventors: Ronald A. Underwood, Stephen M. Brunell, Michael A. Baker, Hira V. Thapliyal, Philip E. Eggers