Patents by Inventor Paul O. Davison
Paul O. Davison 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).
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Publication number: 20170035404Abstract: A surgical retractor for retracting tissue in a surgical field in a patient includes a retractor blade formed from a material so that the retractor blade is non-magnetic, electrically non-conductive, radiolucent, sterilizable and reusable. The material may be a glass filled polymer. A handle may be coupled to a proximal portion of the retractor blade. Additionally an illumination element such as an optical waveguide or light emitting diodes may be coupled to the retractor blade for illuminating the surgical field.Type: ApplicationFiled: April 22, 2016Publication date: February 9, 2017Inventors: Christopher FOSTER, Paul O. Davison, Alex Vayser, Douglas Rimer, Stephen Desantis
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Patent number: 8979842Abstract: Monopolar electrosurgery devices adapted for resecting tonsil and adenoid tissue. The devices minimize thermal injury by employing a plasma generated by pulsed electrical signals to precisely and effectively cut or coagulate the tissues. Suction may also be applied to the tissues to enhance the cutting, coagulation, and tissue manipulation functions. The devices include an interchangeable tip that may be switched for another tip, depending on which tip may be more suitable for tonsillectomy or adenoidectomy.Type: GrantFiled: June 4, 2012Date of Patent: March 17, 2015Assignee: Medtronic Advanced Energy LLCInventors: Ralph I. McNall, III, Kay W. Chang, Paul O. Davison
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Patent number: 8870864Abstract: An electrosurgical apparatus includes two assemblies, one of which is the primary assembly intended for a first surgical procedure, such as cutting tissue, and a secondary assembly intended for a second type of electrosurgical procedure, such as tissue coagulation. The secondary assembly fits over the electrode tip of the primary assembly and makes electrical contact with the electrode tip of the primary assembly. This allows for single instrument surgery whereby the secondary (coagulation) assembly provides bleeding control after the primary assembly has cut tissue. This combination significantly reduces operating time. The secondary assembly has a snap fit over the primary assembly so that it may be readily attached and detached several times during any surgical procedure, as the surgeon alternates between cutting tissue and coagulating the resulting incisions using the apparatus.Type: GrantFiled: October 28, 2011Date of Patent: October 28, 2014Assignee: Medtronic Advanced Energy LLCInventors: Paul O. Davison, Ralph I. McNall, III, John R. Tighe, Alexander B. Vankov
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Patent number: 8663216Abstract: 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 active electrode(s) and one or more return electrode(s) to non-thermally generate a plasma adjacent to the active electrode(s), and to volumetrically remove or ablate at least a portion of the target tissue.Type: GrantFiled: October 1, 2007Date of Patent: March 4, 2014Inventors: Paul O. Davison, Jean Woloszko, Tom Jenkins
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Patent number: 8632537Abstract: Monopolar electrosurgery devices adapted for resecting tonsil and adenoid tissue. The devices minimize thermal injury by employing a plasma generated by pulsed electrical signals to precisely and effectively cut or coagulate the tissues. Suction may also be applied to the tissues to enhance the cutting, coagulation, and tissue manipulation functions. The devices include an interchangeable tip that may be switched for another tip, depending on which tip may be more suitable for tonsillectomy or adenoidectomy.Type: GrantFiled: February 16, 2012Date of Patent: January 21, 2014Assignee: Medtronic Advanced Energy LLCInventors: Ralph I. McNall, III, Kay W. Chang, Paul O. Davison
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Publication number: 20130110108Abstract: An electrosurgical apparatus includes two assemblies, one of which is the primary assembly intended for a first surgical procedure, such as cutting tissue, and a secondary assembly intended for a second type of electrosurgical procedure, such as tissue coagulation. The secondary assembly fits over the electrode tip of the primary assembly and makes electrical contact with the electrode tip of the primary assembly. This allows for single instrument surgery whereby the secondary (coagulation) assembly provides bleeding control after the primary assembly has cut tissue. This combination significantly reduces operating time. The secondary assembly has a snap fit over the primary assembly so that it may be readily attached and detached several times during any surgical procedure, as the surgeon alternates between cutting tissue and coagulating the resulting incisions using the apparatus.Type: ApplicationFiled: October 28, 2011Publication date: May 2, 2013Applicant: PEAK Surgical, Inc.Inventors: Paul O. DAVISON, Ralph I. McNall, III, John R. Tighe, Alexander B. Vankov
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Patent number: 8414572Abstract: Electrosurgery method and apparatus. In the method, tissue is cut or coagulated, with an electrically low conductive liquid providing cooling. In another method, skin is cut by electrosurgery in a dry field using a low duty cycle signal energizing the cutting electrode, minimizing tissue charring. A combination coagulation and cutting electrode performs both functions. The cutting is performed by a blade edge generating a local plasma adapted for cutting. Superimposed on the blade edge is an electrode of greater surface area electrically insulated from the cutting electrode, for coagulation. In another version, a single component cutting/coagulation blade (electrode) has a cutting and a flat partially insulated portion defining through holes in the insulation for coagulation. Also provided is an electrical circuit whereby each electrode is isolated by a filter from cross talk and feedback of the RF signal from the other electrode, minimizing arcing.Type: GrantFiled: March 30, 2012Date of Patent: April 9, 2013Assignee: Medtronic Advanced Energy LLCInventors: Paul O. Davison, Daniel V. Palanker, Alexander B. Vankov
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Publication number: 20120330311Abstract: Monopolar electrosurgery devices adapted for resecting tonsil and adenoid tissue. The devices minimize thermal injury by employing a plasma generated by pulsed electrical signals to precisely and effectively cut or coagulate the tissues. Suction may also be applied to the tissues to enhance the cutting, coagulation, and tissue manipulation functions. The devices include an interchangeable tip that may be switched for another tip, depending on which tip may be more suitable for tonsillectomy or adenoidectomy.Type: ApplicationFiled: June 4, 2012Publication date: December 27, 2012Inventors: Ralph I. McNall, III, Kay W. Chang, Paul O. Davison
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Publication number: 20120191084Abstract: Electrosurgery method and apparatus. In the method, tissue is cut or coagulated, with an electrically low conductive liquid providing cooling. In another method, skin is cut by electrosurgery in a dry field using a low duty cycle signal energizing the cutting electrode, minimizing tissue charring. A combination coagulation and cutting electrode performs both functions. The cutting is performed by a blade edge generating a local plasma adapted for cutting. Superimposed on the blade edge is an electrode of greater surface area electrically insulated from the cutting electrode, for coagulation. In another version, a single component cutting/coagulation blade (electrode) has a cutting and a flat partially insulated portion defining through holes in the insulation for coagulation. Also provided is an electrical circuit whereby each electrode is isolated by a filter from cross talk and feedback of the RF signal from the other electrode, minimizing arcing.Type: ApplicationFiled: March 30, 2012Publication date: July 26, 2012Inventors: Paul O. DAVISON, Daniel V. PALANKER, Alexander B. VANKOV
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Publication number: 20120143186Abstract: Monopolar electrosurgery devices adapted for resecting tonsil and adenoid tissue. The devices minimize thermal injury by employing a plasma generated by pulsed electrical signals to precisely and effectively cut or coagulate the tissues. Suction may also be applied to the tissues to enhance the cutting, coagulation, and tissue manipulation functions. The devices include an interchangeable tip that may be switched for another tip, depending on which tip may be more suitable for tonsillectomy or adenoidectomy.Type: ApplicationFiled: February 16, 2012Publication date: June 7, 2012Inventors: Ralph I. MCNALL, III, Kay W. Chang, Paul O. Davison
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Patent number: 8177783Abstract: Electrosurgery method and apparatus. In the method, tissue is cut or coagulated, with an electrically low conductive liquid providing cooling. In another method, skin is cut by electrosurgery in a dry field using a low duty cycle signal energizing the cutting electrode, minimizing tissue charring. A combination coagulation and cutting electrode performs both functions. The cutting is performed by a blade edge generating a local plasma adapted for cutting. Superimposed on the blade edge is an electrode of greater surface area electrically insulated from the cutting electrode, for coagulation. In another version, a single component cutting/coagulation blade (electrode) has a cutting and a flat partially insulated portion defining through holes in the insulation for coagulation. Also provided is an electrical circuit whereby each electrode is isolated by a filter from cross talk and feedback of the RF signal from the other electrode, minimizing arcing.Type: GrantFiled: November 1, 2007Date of Patent: May 15, 2012Assignee: Peak Surgical, Inc.Inventors: Paul O. Davison, Daniel V. Palanker, Alexander B. Vankov
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Patent number: 8137345Abstract: Monopolar electrosurgery devices adapted for resecting tonsil and adenoid tissue. The devices minimize thermal injury by employing a plasma generated by pulsed electrical signals to precisely and effectively cut or coagulate the tissues. Suction may also be applied to the tissues to enhance the cutting, coagulation, and tissue manipulation functions. The devices include an interchangeable tip that may be switched for another tip, depending on which tip may be more suitable for tonsillectomy or adenoidectomy.Type: GrantFiled: January 5, 2009Date of Patent: March 20, 2012Assignee: Peak Surgical, Inc.Inventors: Ralph I. McNall, III, Kay W. Chang, Paul O. Davison
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Publication number: 20100174283Abstract: Monopolar electrosurgery devices adapted for resecting tonsil and adenoid tissue. The devices minimize thermal injury by employing a plasma generated by pulsed electrical signals to precisely and effectively cut or coagulate the tissues. Suction may also be applied to the tissues to enhance the cutting, coagulation, and tissue manipulation functions. The devices include an interchangeable tip that may be switched for another tip, depending on which tip may be more suitable for tonsillectomy or adenoidectomy.Type: ApplicationFiled: January 5, 2009Publication date: July 8, 2010Inventors: Ralph I. McNall, III, Kay W. Chang, Paul O. Davison
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Patent number: 7704249Abstract: An electrosurgical system and method for ablating, resecting, or cutting body structures, with minimal or no damage to tissue adjacent to the treatment site. The system includes an electrosurgical probe having a shaft with a shaft distal end bifurcated to provide first and second arms. First and second electrode supports are disposed on the first and second arms, respectively. At least one active electrode, in the form of a loop or partial loop, is arranged between the first and second electrode supports. A return electrode, also in the form of a loop or partial loop, is arranged between the first and second electrode supports distal to the active electrode. The active and return electrodes are configured to promote substantially high electric field intensities and associated high current densities between the active portion and the target site when a high frequency voltage is applied to the electrodes.Type: GrantFiled: May 9, 2005Date of Patent: April 27, 2010Assignee: ArthroCare CorporationInventors: Jean Woloszko, Paul O. Davison
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Publication number: 20080140066Abstract: Electrosurgery method and apparatus. In the method, tissue is cut or coagulated, with an electrically low conductive liquid providing cooling. In another method, skin is cut by electrosurgery in a dry field using a low duty cycle signal energizing the cutting electrode, minimizing tissue charring. A combination coagulation and cutting electrode performs both functions. The cutting is performed by a blade edge generating a local plasma adapted for cutting. Superimposed on the blade edge is an electrode of greater surface area electrically insulated from the cutting electrode, for coagulation. In another version, a single component cutting/coagulation blade (electrode) has a cutting and a flat partially insulated portion defining through holes in the insulation for coagulation. Also provided is an electrical circuit whereby each electrode is isolated by a filter from cross talk and feedback of the RF signal from the other electrode, minimizing arcing.Type: ApplicationFiled: November 1, 2007Publication date: June 12, 2008Inventors: Paul O. Davison, Daniel V. Palanker, Alexander B. Vankov
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Patent number: 7276063Abstract: 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 active electrode(s) and one or more return electrode(s) to non-thermally 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: GrantFiled: September 12, 2003Date of Patent: October 2, 2007Assignee: ArthroCare CorporationInventors: Paul O. Davison, Jean Woloszko, Tom Jenkins
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Patent number: 6991631Abstract: Electrosurgical methods, systems, and apparatus for the controlled ablation of tissue from a target site, such as a synovial joint, of a patient. An electrosurgical probe of the invention includes a shaft, and a working end having an electrode array comprising an outer circular arrangement of active electrode terminals and an inner circular arrangement of active electrode terminals. The electrode array is adapted for the controlled ablation of hard tissue, such as meniscus tissue. The working end of the probe is curved to facilitate access to both medial meniscus and lateral meniscus from a portal of 1 cm. or less.Type: GrantFiled: February 13, 2003Date of Patent: January 31, 2006Assignee: Arthrocare CorporationInventors: Jean Woloszko, Paul O. Davison, Theodore C. Ormsby
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Patent number: 6855143Abstract: The present invention comprises electrosurgical apparatus and methods for maintaining patency in body passages subject to occlusion by invasive tissue growth. The apparatus includes an electrode support disposed at a shaft distal end having at least one active electrode arranged thereon, and at least one return electrode proximal to the at least one active electrode. In one embodiment, a plurality of active electrodes each comprising a curved wire loop portion are sealed within a distal portion of the electrode support. The apparatus and methods of the present invention may be used to open and maintain patency in virtually any hollow body passage which may be subject to occlusion by invasive cellular growth or invasive solid tumor growth. Suitable hollow body passages include ducts, orifices, lumens, and the like, with exemplary body passages including the coronary arteries.Type: GrantFiled: December 12, 2000Date of Patent: February 15, 2005Assignee: Arthrocare CorporationInventors: Paul O. Davison, Jean Woloszko
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Publication number: 20040054366Abstract: 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 active electrode(s) and one or more return electrode(s) to non-thermally 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: ApplicationFiled: September 12, 2003Publication date: March 18, 2004Applicant: ArthroCare CorporationInventors: Paul O. Davison, Jean Woloszko, Tom Jenkins
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Publication number: 20030225403Abstract: Electrosurgical methods, systems, and apparatus for the controlled ablation of tissue from a target site, such as a synovial joint, of a patient. An electrosurgical probe of the invention includes a shaft, and a working end having an electrode array comprising an outer circular arrangement of active electrode terminals and an inner circular arrangement of active electrode terminals. The electrode array is adapted for the controlled ablation of hard tissue, such as meniscus tissue. The working end of the probe is curved to facilitate access to both medial meniscus and lateral meniscus from a portal of 1 cm. or less.Type: ApplicationFiled: February 13, 2003Publication date: December 4, 2003Applicant: ArthroCare CorporationInventors: Jean Woloszko, Paul O. Davison, Theodore C. Ormsby