Patents by Inventor David Greg Anderson

David Greg Anderson 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: 8057518
    Abstract: A spanning connector for connecting an offset bone anchor to a previously inserted spinal fixation element and method of use is provided. The spanning connector includes a first connecting mechanism for connecting the spanning connector to the bone anchor, and a second connecting mechanism for connector the spanning connector to the previously inserted spinal fixation element. The spanning connector also includes a connector body for coupling the first connecting mechanism and the second connecting mechanism. Embodiments of a spanning connector may also reduce a separation distance between the bone anchor and the spinal fixation element. Embodiments of a spanning connector are configured, sized and dimensioned for use in a minimally invasive surgical technique, such as a rod-first spinal surgical technique.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: November 15, 2011
    Assignee: DePuy Spine, Inc.
    Inventors: William J. Frasier, Michael Mahoney, Nicholas Pavento, Christopher L. Ramsay, David Greg Anderson
  • Patent number: 8025682
    Abstract: A rod anchoring system including a bone anchor and a connector is provided. The connector of the rod anchoring system is configured to be inserted in one orientation and then transitioned to a second orientation to connect the rod to the anchor. The bone anchor includes a detachable extension shaft that acts as a guide for inserting the connector. In use, once the bone anchor has been implanted at a target site on a vertebra, the connector is placed onto the extension shaft and slid along its length in a first orientation to insert the connector. Once the connector is at the implant site, it is transitioned from the first orientation to the second orientation to connect the rod to the anchor.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: September 27, 2011
    Assignee: DePuy Spine, Inc.
    Inventors: Michael Mahoney, Christopher L. Ramsay, David Greg Anderson, Steven Ludwig, Michael Wang
  • Publication number: 20100137915
    Abstract: Minimally invasive methods and devices are provided for positioning a spinal fixation element in relation to adjacent spinal anchors. In an exemplary embodiment, the device is a percutaneous access device that can be coupled to a spinal anchor, and the method includes the step of positioning a spinal fixation element through at least one sidewall opening of at least two percutaneous access devices such that the spinal fixation element extends in a lengthwise orientation that is substantially transverse to the longitudinal axis of each percutaneous access device. The spinal fixation element can then be advanced in the lengthwise orientation to seat the spinal fixation element in or adjacent to the receiver heads of at least two adjacent spinal anchors. A fastening element or other closure mechanism can then be applied to each spinal anchor to engage the spinal fixation element within the receiver heads of the adjacent anchors.
    Type: Application
    Filed: February 4, 2010
    Publication date: June 3, 2010
    Applicant: DEPUY SPINE, INC.
    Inventors: David Greg Anderson, George Joseph Ross
  • Patent number: 7708766
    Abstract: A simple, safe implantable bone screw, and a method for distracting two bone segments, is provided. In general, the bone screw includes a shank having a threaded proximal portion and a distal portion with a major diameter that is less than a minor diameter of the threaded proximal portion. A transitional region of decreasing diameter can be disposed between the threaded proximal portion and the distal portion, and a driver receiving element is preferably disposed on a proximal end of the bone screw. In use, the proximal and distal portions of the bone screw are adapted to engage two segments of bone, and to create a distraction force between the two segments of bone.
    Type: Grant
    Filed: August 11, 2003
    Date of Patent: May 4, 2010
    Assignee: DePuy Spine, Inc.
    Inventors: David Greg Anderson, Conor McCrea, Christopher Ramsay
  • Patent number: 7666188
    Abstract: Minimally invasive methods and devices are provided for positioning a spinal fixation element in relation to adjacent spinal anchors. In an exemplary embodiment, the device is a percutaneous access device that can be coupled to a spinal anchor, and the method includes the step of positioning a spinal fixation element through at least one sidewall opening of at least two percutaneous access devices such that the spinal fixation element extends in a lengthwise orientation that is substantially transverse to the longitudinal axis of each percutaneous access device. The spinal fixation element can then be advanced in the lengthwise orientation to seat the spinal fixation element in or adjacent to the receiver heads of at least two adjacent spinal anchors. A fastening element or other closure mechanism can then be applied to each spinal anchor to engage the spinal fixation element within the receiver heads of the adjacent anchors.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: February 23, 2010
    Assignee: DePuy Spine, Inc.
    Inventors: David Greg Anderson, George Joseph Ross
  • Publication number: 20090221922
    Abstract: The “Smart Tool” includes a “Smart Tool Probe” and two processing modules. The Smart Tool Probe is a hand held, wired or wireless, device that a surgeon utilizes for interrogating and identifying a tissue site, such as the entrance to a pedicle. The processing units, an Electro-Optical Control (EOC) Module and a CDS Module, provide control and display capabilities enabling real-time tissue site (such as vertebra bone) interrogation. The Smart Tool Probe utilizes a system of optical fibers that carry the interrogating optical signal sent by the light source(s) and the reflected optical signal back to the optical receivers. The light source(s) and light receivers are located in the EOC Module. The data received from the EOC Module are processed and converted into an image which is displayed on the screen in real-time. The software installed on the machine allows the surgeon to adjust/enhance the image properties to suit the selected requirements.
    Type: Application
    Filed: March 3, 2009
    Publication date: September 3, 2009
    Inventors: Ryszard Lec, Mark R. Goodwin, David Greg Anderson, Daniel Schwartz, Denis Drummond
  • Publication number: 20090138056
    Abstract: Minimally invasive methods and devices for introducing a spinal fixation element into a surgical site in a patient's spinal column are provided. In general, the method involves advancing a spinal fixation element in a first, lengthwise orientation along a pathway extending from a minimally invasive percutaneous incision to a spinal anchor site. As the spinal fixation element approaches the spinal anchor site, the fixation element can be manipulated to extend in a second orientation, which is preferably substantially transverse to the first orientation, to position the fixation element in relation to one or more spinal anchors.
    Type: Application
    Filed: February 4, 2009
    Publication date: May 28, 2009
    Applicant: DEPUY SPINE, INC.
    Inventors: David Greg Anderson, Christopher Sicvol, George Joseph Ross, Sean P. Selover
  • Patent number: 7527638
    Abstract: Minimally invasive methods and devices for introducing a spinal fixation element into a surgical site in a patient's spinal column are provided. In general, the method involves advancing a spinal fixation element in a first, lengthwise orientation along a pathway extending from a minimally invasive percutaneous incision to a spinal anchor site. As the spinal fixation element approaches the spinal anchor site, the fixation element can be manipulated to extend in a second orientation, which is preferably substantially transverse to the first orientation, to position the fixation element in relation to one or more spinal anchors.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: May 5, 2009
    Assignee: DePuy Spine, Inc.
    Inventors: David Greg Anderson, Christopher W. Sicvol, George Joseph Ross, Sean P. Selover, Ramon Alberto Ruberte
  • Publication number: 20090082811
    Abstract: Methods for delivering a spinal fixation element to a surgical site are provided herein. More specifically, the method includes delivering a plurality of percutaneous access devices to a corresponding number of spinal locations, inserting a spinal fixation element through tissue, and manipulating the element through opposed sidewall openings formed in each access device. In an exemplary embodiment, the method can be optimized for position of large-scale fixation elements (e.g., greater than about 95 mm in length). In addition, a manipulation instrument configured to position such spinal fixation elements is also provided herein.
    Type: Application
    Filed: September 26, 2007
    Publication date: March 26, 2009
    Applicant: DePUY SPINE, INC.
    Inventors: Shawn D. Stad, David Greg Anderson, Tony Tannoury, Paul G. Beaudoin, Sara Dziedzic
  • Publication number: 20090062822
    Abstract: An adaptable clamping mechanism for coupling an elongate spinal fixation element to a bone anchor is provided. A seat element and a clamp element of the adaptable clamping mechanism adapt to seat and clamp an elongate spinal fixation element whose longitudinal axis is non-perpendicular relative to the as central axis of the bone anchor. One or both of the seat element and the clamp element may adjust to an out-of-plane orientation of the elongate spinal fixation element by pivoting or rotating in one or more directions. One or both of the seat element and the clamp element may have a deformable portion configured to deform to the orientation of a surface of the elongate spinal fixation element.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Inventors: William J. Frasier, Michael Mahoney, Nicholas Pavento, Christopher L. Ramsay, David Greg Anderson, Steven Ludwig
  • Publication number: 20090062861
    Abstract: A spanning connector for connecting an offset bone anchor to a previously inserted spinal fixation element and method of use is provided. The spanning connector includes a first connecting mechanism for connecting the spanning connector to the bone anchor, and a second connecting mechanism for connector the spanning connector to the previously inserted spinal fixation element. The spanning connector also includes a connector body for coupling the first connecting mechanism and the second connecting mechanism. Embodiments of a spanning connector may also reduce a separation distance between the bone anchor and the spinal fixation element. Embodiments of a spanning connector are configured, sized and dimensioned for use in a minimally invasive surgical technique, such as a rod-first spinal surgical technique.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Inventors: William J. Frasier, Michael Mahoney, Nicholas Pavento, Christopher L. Ramsay, David Greg Anderson
  • Publication number: 20090062858
    Abstract: Methods and instruments are provided for connecting a rod extending along a patient's spinal column to a misaligned vertebra. The method comprises implanting a bone anchor in the misaligned vertebra, attaching an approximating device to the implanted bone anchor and rod, approximating the vertebra toward the rod using the approximating device, and connecting the rod to the bone anchor on the approximated vertebra. In certain embodiments the approximating device may include a winch mechanism. In other embodiments the approximating device is a cannula used in conjunction with a guide system.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Inventors: Sara Dziedzic, William J. Frasier, Michael Mahoney, Nicholas Pavento, Christopher L. Ramsay, David Greg Anderson
  • Publication number: 20090062857
    Abstract: A minimally invasive fixation system and installation method is provided. The system includes a rod having an anchor fixation head, an anchor system for anchoring the rod using the anchor fixation head, and a guide system configured to attach to the anchor fixation head of the rod for the insertion of the additional anchor systems. In one embodiment, a method for placing a spinal fixation element relative to a vertebra is provided.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Inventors: Christopher L. Ramsay, Michael Mahoney, David Greg Anderson, Michael Wang, Steven Ludwig
  • Publication number: 20090062859
    Abstract: A rod anchoring system including a bone anchor and a connector is provided. The connector of the rod anchoring system is configured to be inserted in one orientation and then transitioned to a second orientation to connect the rod to the anchor. The bone anchor includes a detachable extension shaft that acts a guide for inserting the connector. In use, once the bone anchor has been implanted at a target site on a vertebra, the connector is placed onto the extension shaft and slid along its length in a first orientation to insert the connector. Once the connector is at the implant site, it is transitioned from the first orientation to the second orientation to connect the rod to the anchor.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Inventors: Michael Mahoney, Christopher L. Ramsay, David Greg Anderson, Steven Ludwig, Michael Wang