Patents by Inventor Douglas G. Evans

Douglas G. Evans 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: 6955681
    Abstract: A transmyocardial revascularization system including a plurality of inserts formed of a material to elicit a healing response in tissue of the myocardium and deployment instruments and associated components for deploying the inserts into the wall of the myocardium. The inserts are arranged to be disposed within respective lumens or channels in the wall of the myocardium. The inserts can take various forms, e.g., be solid members, tubular members, or porous members, and may be resorbable, partially resorbable or non-resorbable. In some embodiments the inserts are arranged to be left in place within the channels in the wall of the myocardium to result in plural lumens which enable blood to flow therethrough and into contiguous capillaries. The deployment instruments are arranged to pierce the tissue of the myocardium from either the endocardium or the epicardium to insert the inserts into the myocardium, depending on the particular deployment instrument used.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: October 18, 2005
    Assignee: Kensey Nash Corporation
    Inventors: Douglas G. Evans, John E. Nash
  • Patent number: 6923820
    Abstract: A system and method of use for effecting the bypass or other anastomosis, connection, or port in a portion of a native blood vessel, duct, lumen or other tubular organ within the body of a living being. The system includes a connector assembly and a deployment instrument for carrying the device to the desired position within the vessel, duct, lumen or tubular organ. The system includes a piercer-dilator instrument to form an opening in the wall of the vessel, duct, lumen or tubular organ into which a connector assembly may be deployed by the deployment instrument. The connector assembly may be at least partially formed of a resorbable material and includes movable members for securing it to the tissue of the vessel, duct, lumen or tubular organ contiguous with the opening. Other components may be included in the device for expediting the procedure, with or without the use of sutures.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: August 2, 2005
    Assignee: Kensey Nash Corporation
    Inventors: John E. Nash, Douglas G. Evans, David M. Hoganson
  • Patent number: 6872192
    Abstract: An attachment tool to facilitate the attachment of a catheter or similar elongated instrument to a guide-wire or other elongated guide member, without requiring access to either end of said wire or member. Said tool providing repeatable and reliable alignment of components to be attached, while being operated with a single hand. The tool further facilitates the attachment of a plurality of catheters or instruments to a single wire or member.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: March 29, 2005
    Assignee: Kensey Nash Corporation
    Inventors: John E. Nash, Gregory Walters, Douglas G. Evans, David Szabo, Michael Paris
  • Patent number: 6830577
    Abstract: A system and method for treating diseased target tissue of a living being. The system comprises a working head, e.g., a rotary impacting impeller, a stent delivery catheter, a flush catheter, or liquid jets, a debris extraction sub-system, and may have barrier means in certain embodiments. The working head is arranged to treat diseased tissue, e.g., at least partially occluded with atherosclerotic plaque, or surrounding tissue being compromised by a disease such as cancer, in vessels or lumens, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, to create a differential flow adjacent the working head. The introduction of the infusate liquid may also be used to deliver drugs and other therapies systemically or locally, between the working head and the distal protection barrier.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: December 14, 2004
    Assignee: Kensey Nash Corporation
    Inventors: John E. Nash, Douglas G. Evans, David M. Hoganson
  • Publication number: 20040242971
    Abstract: An illuminated surgical retractor for defining and illuminating a subcutaneous surgical field in the space near a vessel (such as the radial artery or the basilic vein) during a procedure for harvesting the vessel, wherein the illuminated surgical retractor includes a handle member pivotally connected at an acute angle to a first elongate section that has a non-liner shape, and includes a second elongate section releasably connected to the first elongate section, wherein a portion of the second elongate section defines an illumination input end portion, which is optically coupled to a light source to substantially illuminate the second elongate section, and further including an insertion area positioned on the proximal end portion of the first elongate section to allow the second elongate section to be inserted into the first elongate section.
    Type: Application
    Filed: July 13, 2004
    Publication date: December 2, 2004
    Inventors: Donna D. Holland, John D. Pond, Douglas G. Evans
  • Publication number: 20040236185
    Abstract: An illuminated surgical retractor for defining and illuminating a subcutaneous surgical field in the space near a vessel (such as the saphenous vein or radial artery) during a procedure for harvesting the vessel, wherein the illuminated surgical retractor includes a handle member pivotally connected at an acute angle to a first elongate section that has an at least partially tapered width, and includes a second elongate section releasably connected to the first elongate section, wherein a portion of the second elongate section defines an illumination input end portion, which is optically coupled to a light source to substantially illuminate the second elongate section, and further including an insertion area positioned on the proximal end portion of the first elongate section to allow the second elongate section to be inserted into the first elongate section.
    Type: Application
    Filed: July 6, 2004
    Publication date: November 25, 2004
    Inventors: Donna D. Holland, Douglas G. Evans
  • Patent number: 6817978
    Abstract: An illuminated surgical retractor for defining and illuminating a subcutaneous surgical field in the space near a vessel (such as the radial artery or the basilic vein) during a procedure for harvesting the vessel, wherein the illuminated surgical retractor includes a handle member pivotally connected at an acute angle to a first elongate section that has a non-liner shape, and includes a second elongate section releasably connected to the first elongate section, wherein a portion of the second elongate section defines an illumination input end portion, which is optically coupled to a light source to substantially illuminate the second elongate section, and further including an insertion area positioned on the proximal end portion of the first elongate section to allow the second elongate section to be inserted into the first elongate section.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: November 16, 2004
    Assignee: Teleflex-CT Devices Incorporated
    Inventors: Donna D. Holland, John D. Pond, Jr., Douglas G. Evans
  • Publication number: 20040210239
    Abstract: A system and method for treating diseased target tissue of a living being. The system comprises a working head, e.g., a rotary impacting impeller, a stent delivery catheter, a flush catheter, or liquid jets, a debris extraction sub-system, and may have barrier means in certain embodiments. The working head is arranged to treat diseased tissue, e.g., at least partially occluded with atherosclerotic plaque, or surrounding tissue being compromised by a disease such as cancer, in vessels or lumens, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid adjacent the working head and withdraws that liquid and debris adjacent the working head. The introduction of the infusate liquid may also be used to deliver drugs and other therapies systemically or locally, between the working head and the distal protection barrier.
    Type: Application
    Filed: May 18, 2004
    Publication date: October 21, 2004
    Inventors: John E. Nash, Douglas G. Evans, David M. Hoganson
  • Patent number: 6805666
    Abstract: An illuminated surgical retractor for defining and illuminating a subcutaneous surgical field in the space near a vessel (such as the saphenous vein or radial artery) during a procedure for harvesting the vessel, wherein the illuminated surgical retractor includes a handle member pivotally connected at an acute angle to a first elongate section that has an at least partially tapered width, and includes a second elongate section releasably connected to the first elongate section, wherein a portion of the second elongate section defines an illumination input end portion, which is optically coupled to a light source to substantially illuminate the second elongate section, and further including an insertion area positioned on the proximal end portion of the first elongate section to allow the second elongate section to be inserted into the first elongate section.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: October 19, 2004
    Inventors: Donna D. Holland, Douglas G. Evans
  • Publication number: 20040158227
    Abstract: The systems basically comprise a delivery system for accessing the targeted tissue within the living being and introduction of at least one agent at select locations in the into the myocardium and other select tissues. The delivery systems are arranged to access the tissues of the heart. One or more of the systems can be utilized during transluminal, transthoracic and direct surgical access procedures. Where appropriate, for example in the case of intraventricular access, portions of the system are steerable to properly orient the device. The instruments may pierce the heart tissue and create channels extending from the endocardium, the epicardium, or the cardiac vessels. When tissue penetration is utilized, the device may include a feature to control the depth of penetration. To minimize bleeding through the channels the device can dilate small initial punctures that later contract down after device removal.
    Type: Application
    Filed: January 23, 2004
    Publication date: August 12, 2004
    Applicant: Kensey Nash Corporation, Marsh Creek Corporate Center
    Inventors: John E. Nash, Douglas G. Evans, David M. Hoganson
  • Publication number: 20040144395
    Abstract: A system for supporting the urethra using an introducer needle, the ends of which are flattened and which have openings therethrough, a handle having a latch mechanism which engages the opening in the flattened portion of the first end of the introducer needle, an implant, and a connector joining the end of the implant to the flattened portion of one of the ends of the introducer needle. These components are used to draw the implant into position, either through vaginal or abdominal incisions, to form a U-shaped loop beneath the urethra. The ends of the implant are adjusted to provide proper support for the urethra. The implant can have slits that open under applied tensile force.
    Type: Application
    Filed: August 1, 2003
    Publication date: July 29, 2004
    Inventors: Douglas G. Evans, Ken Butcher, Michele Gandy Davis
  • Publication number: 20040138758
    Abstract: An implantable material for deployment in select locations or select tissue for tissue regeneration is disclosed. The implant comprises collagen, ceramics, and or other bio-resorbable materials or additives, where the implant may also be used for therapy delivery. Additionally, the implant may be “matched” to provide the implant with similar physical and/or chemical properties as the host tissue.
    Type: Application
    Filed: November 5, 2003
    Publication date: July 15, 2004
    Inventors: Douglas G. Evans, Scott M. Goldman, Russell T. Kronengold
  • Publication number: 20040133185
    Abstract: An attachment tool to facilitate the attachment of one or more catheters or similar elongated instruments to a guide-wire or other elongated guide member, without requiring access to either end of said wire or member. The tool provides repeatable and reliable alignment of components to be attached, while being operated with a single hand. The catheter systems can be used for revascularization or treatment of arteries and lumens within the body, and the associated delivery of therapies therein and can include side attachable and over-the-wire components and/or low profile combination catheters to allow for flush and extraction of debris in small or tortuous anatomic pathways.
    Type: Application
    Filed: February 27, 2004
    Publication date: July 8, 2004
    Inventors: John E. Nash, Gregory Walters, Douglas G. Evans, David Szabo, Michael Paris
  • Publication number: 20040127987
    Abstract: An implantable material for deployment in select locations or select tissue for tissue regeneration is disclosed. The implant comprises collagen, ceramics, and or other bio-resorbable materials or additives, where the implant may also be used for therapy delivery. Additionally, the implant may be “matched” to provide the implant with similar physical and/or chemical properties as the host tissue.
    Type: Application
    Filed: November 14, 2003
    Publication date: July 1, 2004
    Inventors: Douglas G. Evans, Scott M. Goldman, Russell T. Kronengold
  • Publication number: 20040064193
    Abstract: An implant for deployment in select locations or select tissue for regeneration of tissue is disclosed. The implant comprising collagen and or other bio-resorbable materials, where the implant may also be used for therapy delivery. Additionally, the implant may be “matched” to provide the implant with similar physical and/or chemical properties as the host tissue.
    Type: Application
    Filed: July 31, 2003
    Publication date: April 1, 2004
    Inventors: Douglas G. Evans, Scott M. Goldman, Russell T. Kronengold
  • Patent number: 6709427
    Abstract: The systems basically comprise a delivery system for accessing the targeted tissue within the living being and introduction of at least one agent at select locations in the into the myocardium and other select tissues. The delivery systems are arranged to access the tissues of the heart. One or more of the systems can be utilized during transluminal, transthoracic and direct surgical access procedures. Where appropriate, for example in the case of intraventricular access, portions of the system are steerable to properly orient the device. The instruments may pierce the heart tissue and create channels extending from the endocardium, the epicardium, or the cardiac vessels. When tissue penetration is utilized, the device may include a feature to control the depth of penetration. To minimize bleeding through the channels the device can dilate small initial punctures that later contract down after device removal.
    Type: Grant
    Filed: August 5, 1999
    Date of Patent: March 23, 2004
    Assignee: Kensey Nash Corporation
    Inventors: John E. Nash, Douglas G. Evans, David M. Hoganson
  • Publication number: 20040034434
    Abstract: An implantable material for deployment in select locations or select tissue for tissue regeneration is disclosed. The implant comprises collagen, ceramics, and or other bio-resorbable materials or additives, where the implant may also be used for therapy delivery. Additionally, the implant may be “matched” to provide the implant with similar physical and/or chemical properties as the host tissue.
    Type: Application
    Filed: August 14, 2003
    Publication date: February 19, 2004
    Inventors: Douglas G. Evans, Scott M. Goldman, Russell T. Kronengold
  • Publication number: 20040010048
    Abstract: Devices and processes (e.g., improved Plasticized Melt Flow processes (PMF) or improved Phase Separation Polymer Concentration (PSPC), etc.) used to make resorbable and non-resorbable structures for treating and/or healing of tissue defects are disclosed. Among the advantages of using these improved processes are the preservation of molecular weight and the broadening of the processing conditions for temperature sensitive polymers and therapies This reduction in processing temperature, pressure and time can help to preserve the molecular weight and/or integrity of the final product or any additive incorporated therein. The present invention relates to an improved porous implant wherein the pores of the implant present a second modeling material on their surfaces. This second material provides a textured or roughened face to the internal surfaces of pores.
    Type: Application
    Filed: August 15, 2002
    Publication date: January 15, 2004
    Inventors: Douglas G. Evans, Jeffrey C. Kelly, Todd M. DeWitt
  • Publication number: 20040006146
    Abstract: Devices and processes (e.g., improved Plasticized Melt Flow processes (PMF) or improved Phase Separation Polymer Concentration (PSPC), etc.) used to make resorbable and non-resorbable structures for treating and/or healing of tissue defects are disclosed. Among the advantages of using these improved processes are the preservation of molecular weight and the broadening of the processing conditions for temperature sensitive polymers and therapies (e.g. polylactide, polyglycolide, polycaprolactone or Cisplatin, etc.). This reduction in processing temperature, pressure and time can help to preserve the molecular weight and/or integrity of the final product or any additive incorporated therein. Additionally, pore size and shape tailoring can increase the osteoconductive nature of the device.
    Type: Application
    Filed: July 6, 2002
    Publication date: January 8, 2004
    Inventors: Douglas G. Evans, Jeffrey C. Kelly, Todd M. DeWitt
  • Publication number: 20030236573
    Abstract: An implant for deployment in select locations or select tissue for regeneration of tissue is disclosed. The implant comprising collagen and or other bio-resorbable materials, where the implant may also be used for therapy delivery. Additionally, the implant may be “matched” to provide the implant with similar physical and/or chemical properties as the host tissue.
    Type: Application
    Filed: June 13, 2002
    Publication date: December 25, 2003
    Inventors: Douglas G. Evans, Scott M. Goldman, Russell T Kronengold