Patents by Inventor Tracy Maahs

Tracy Maahs 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).

  • Publication number: 20060015140
    Abstract: The invention provides a nested tubing cannula which comprises outer and inner elongate tubular members, both having a proximal end, a distal end, and a lumen therebetween. The inner tubular member is sealed at its distal end and is nested substantially coaxially within the lumen of the outer tubular member, so that the gap between the inner and the outer tubular member defines a second lumen whereas the first lumen is the lumen of the inner tubular member. A tubular sleeve is disposed coaxially between the inner and outer tubular members. A balloon is mounted on a distal region of the outer tubular member and is in communication with the first lumen. The cannula further comprises a port proximal or distal the balloon occluder and is in communication with the second lumen. Methods for making the devices herein are disclosed.
    Type: Application
    Filed: August 18, 2005
    Publication date: January 19, 2006
    Inventors: Ross Tsugita, Tracy Maahs, Yue-Teh Jang
  • Publication number: 20050277981
    Abstract: Apparatus and methods for optimizing anchoring force are described herein. In securing tissue folds, over-compression of the tissue directly underlying the anchors is avoided by utilizing tissue anchors having expandable arms configured to minimize contact area between the anchor and tissue. When the anchor is in its expanded configuration, a load is applied to the anchor until it is optimally configured to accommodate a range of deflections while the anchor itself exerts a substantially constant force against the tissue. Various devices, e.g., stops, spring members, fuses, strain gauges, etc., can be used to indicate when the anchor has been deflected to a predetermined level within the optimal range. Moreover, other factors to affect the anchor characteristics include, e.g., varying the number of arms or struts of the anchor, positioning of the arms, configuration of the arms, the length of the collars, etc.
    Type: Application
    Filed: June 9, 2004
    Publication date: December 15, 2005
    Applicant: USGI Medical Inc.
    Inventors: Tracy Maahs, Richard Ewers, Vahid Saadat, Alex Khairkhahan, Kenneth Michlitsch
  • Publication number: 20050277983
    Abstract: Systems for optimizing anchoring force are described herein. In securing tissue folds, over-compression of the tissue directly underlying the anchors is avoided by utilizing tissue anchors having expandable arms configured to minimize contact area between the anchor and tissue. When the anchor is in its expanded configuration, a load is applied to the anchor until it is optimally configured to accommodate a range of deflections while the anchor itself exerts a substantially constant force against the tissue. Various devices, e.g., stops, spring members, fuses, strain gauges, etc., can be used to indicate when the anchor has been deflected to a predetermined level within the optimal range. Moreover, other factors to affect the anchor characteristics include, e.g., varying the number of arms or struts of the anchor, positioning of the arms, configuration of the arms, the length of the collars, etc.
    Type: Application
    Filed: June 9, 2004
    Publication date: December 15, 2005
    Applicant: USGI Medical INC.
    Inventors: Vahid Saadat, Richard Ewers, Tracy Maahs, Alex Khairkhahan, Kenneth Michlitsch
  • Publication number: 20050251207
    Abstract: Apparatus and methods for positioning and securing anchors are disclosed herein. The anchors are adapted to be delivered and implanted into or upon tissue, particularly tissue within the gastrointestinal system of a patient. The anchor is adapted to slide uni-directionally over suture such that a tissue plication may be cinched between anchors. A locking mechanism either within the anchor itself of positioned proximally of the anchor may allow for the uni-directional translation while enabling the anchor to be locked onto the suture if the anchor is pulled, pushed, or otherwise urged in the opposite direction along the suture. This uni-directional anchor locking mechanism facilitates the cinching of the tissue plication between the anchors and it may be utilized in one or several anchors in cinching a tissue fold.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 10, 2005
    Inventors: Jesus Flores, Richard Ewers, Tracy Maahs, Alex Khairkhahan, Ruey-Feng Peh, Vahid Saadat
  • Publication number: 20050251157
    Abstract: Apparatus and methods for positioning and securing anchors are disclosed herein. The anchors are adapted to be delivered and implanted into or upon tissue, particularly tissue within the gastrointestinal system of a patient. The anchor is adapted to slide uni-directionally over suture such that a tissue plication may be cinched between anchors. A locking mechanism either within the anchor itself of positioned proximally of the anchor may allow for the uni-directional translation while enabling the anchor to be locked onto the suture if the anchor is pulled, pushed, or otherwise urged in the opposite direction along the suture. This unidirectional anchor locking mechanism facilitates the cinching of the tissue plication between the anchors and it may be utilized in one or several anchors in cinching a tissue fold.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 10, 2005
    Inventors: Vahid Saadat, Tracy Maahs, Richard Ewers, Marvin Elmers, Jesus Flores, Alex Khairkhahan, Ruey-Feng Peh, Cang Lam
  • Publication number: 20050251206
    Abstract: Apparatus and methods for positioning and securing anchors are disclosed herein. The anchors are adapted to be delivered and implanted into or upon tissue, particularly tissue within the gastrointestinal system of a patient. The anchor is adapted to slide uni-directionally over suture such that a tissue plication may be cinched between anchors. A locking mechanism either within the anchor itself of positioned proximally of the anchor may allow for the uni-directional translation while enabling the anchor to be locked onto the suture if the anchor is pulled, pushed, or otherwise urged in the opposite direction along the suture. This uni-directional anchor locking mechanism facilitates the cinching of the tissue plication between the anchors and it may be utilized in one or several anchors in cinching a tissue fold.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 10, 2005
    Inventors: Tracy Maahs, Richard Ewers, Jesus Flores, Alex Khairkhahan, Ruey-Feng Peh, Vahid Saadat, Cang Lam
  • Publication number: 20050250980
    Abstract: The present invention provides methods for performing gastroplasty by reducing the effective volume or cross-sectional area of the stomach via approximation of gastric tissue. Such reduction preferably is achieved endoluminally, either with or without laparoscopic ports. In one variation, a sleeve, pouch, Magenstrasse and Mill, Vertical Banded Gastroplasty (“VBG”), etc., is formed within the stomach by approximating opposing anterior and posterior segments or ridges of the stomach wall at locations inferior to the gastroesophageal junction. In another variation, opposing walls of the stomach are approximated at a plurality of substantially random locations to reduce an effective volume of the stomach. In yet another variation, both a sleeve and random approximations are formed, the random approximations preferably disposed in a portion of the stomach excluded by the sleeve. In still another variation, opposing walls of the stomach are approximated over significant lengths at random or specified locations.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 10, 2005
    Inventors: Lee Swanstrom, Richard Ewers, Tracy Maahs, Eugene Chen, Vahid Saadat
  • Publication number: 20050251205
    Abstract: Apparatus and methods for positioning and securing anchors are disclosed herein. The anchors are adapted to be delivered and implanted into or upon tissue, particularly tissue within the gastrointestinal system of a patient. The anchor is adapted to slide uni-directionally over suture such that a tissue plication may be cinched between anchors. A locking mechanism either within the anchor itself of positioned proximally of the anchor may allow for the uni-directional translation while enabling the anchor to be locked onto the suture if the anchor is pulled, pushed, or otherwise urged in the opposite direction along the suture. This uni-directional anchor locking mechanism facilitates the cinching of the tissue plication between the anchors and it may be utilized in one or several anchors in cinching a tissue fold.
    Type: Application
    Filed: May 7, 2004
    Publication date: November 10, 2005
    Applicant: USGI Medical Inc.
    Inventors: Richard Ewers, Tracy Maahs, Jesus Flores, Alex Khairkhahan, Ruey-Feng Peh, Vahid Saadat
  • Publication number: 20050251202
    Abstract: Interlocking tissue anchor apparatus and methods are described herein. In creating tissue folds within the body of a patient, a tissue manipulation assembly may generally have an elongate tubular member, an engagement member slidably disposed through the tubular member and a distal end adapted to engage tissue via a helical member, tissue stabilizing members positioned at the tubular member distal end which are adapted to stabilize tissue therebetween, and a delivery tube pivotable about the tissue stabilizer. Anchor assemblies can be delivered via the tissue manipulation assembly into or through the tissue. The anchors can incorporate various temporary interlocking features or spacing elements between one another to ensure that an anchor is not prematurely ejected from the needle assembly. This allows the anchor assembly to be advanced distally as well as withdrawn proximally within a deployment sheath while avoiding inadvertently ejecting an anchor.
    Type: Application
    Filed: September 30, 2004
    Publication date: November 10, 2005
    Applicant: USGI Medical Inc.
    Inventors: Richard Ewers, Tracy Maahs, Cang Lam, Vahid Saadat, Chris Rothe
  • Publication number: 20050251208
    Abstract: Linear anchors for anchoring to tissue are disclosed herein. The anchors are adapted to be delivered and implanted into or upon tissue, particularly tissue within the gastrointestinal system of a patient. The anchor, which may be a ribbon, flattened wire, etc., is adapted to be delivered in an elongate straightened configuration through or against the tissue and then compressed along a longitudinal direction such that a tissue plication may be cinched between anchors. The elongate anchor defines a plurality of holes along its length in any number of patterns. A length of suture is routed through these holes such that tensioning the suture urges the elongate anchor to compress into its expanded anchoring configuration. A locking mechanism facilitates the cinching of the anchor against the tissue surface.
    Type: Application
    Filed: June 15, 2004
    Publication date: November 10, 2005
    Applicant: USGI Medical Inc.
    Inventors: Marvin Elmer, Tracy Maahs, Vahid Saadat, Kenneth Michlitsch
  • Publication number: 20050234296
    Abstract: The present invention provides methods and apparatus for obtaining endoluminal access. An elongate body is configured for insertion within a body lumen, conduit, organ, orifice or passageway, the elongate body having a working axis and a distal region, and an articulating element disposed near the distal region, the articulating element configured to articulate off-axis from the working axis of the elongate body. Methods of using apparatus of the present invention are also provided.
    Type: Application
    Filed: April 14, 2004
    Publication date: October 20, 2005
    Applicant: USGI Medical Inc.
    Inventors: Vahid Saadat, Desmond Birkett, Chris Rothe, Tracy Maahs
  • Publication number: 20050203488
    Abstract: Apparatus and methods are provided for mapping out endoluminal gastrointestinal surgery, including endoluminal gastric reduction. Mapping is achieved by locally marking the interior of the gastrointestinal lumen at specified locations. In a first embodiment, the surgical map comprises localized RF scarring or mucosal ablation. In an alternative embodiment, the map comprises pegs. In another alternative embodiment, the map comprises dye and/or spheres injected into at least the submucosa. As a still further alternative, the map may comprise the shaft of an endoluminal surgical tool having specified dimensions and/or color-coding, etc. In another alternative embodiment, the map may be formed from surgical mesh. In one preferred embodiment, placement of the map is accurately achieved by approximating the interior of the stomach with an endoluminal support via suction ports and/or via an inflatable member disposed along the support. Methods of using apparatus of the present invention are provided.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 15, 2005
    Applicant: USGI MEDICAL INC.
    Inventors: Kenneth Michlitsch, Vahid Saadat, Rodney Brenneman, Tracy Maahs
  • Publication number: 20050192629
    Abstract: Apparatus and methods are provided for creating and regulating a gastric stoma by intraluminally reducing or partitioning a local cross-sectional area of the stomach, thereby inducing weight loss in obese patients. Various embodiments of stomas in accordance with the present invention are provided, as well as various regulation mechanisms for controlling or adjusting the size of the stoma.
    Type: Application
    Filed: February 14, 2005
    Publication date: September 1, 2005
    Applicant: USGI Medical Inc.
    Inventors: Vahid Saadat, Richard Ewers, Rodney Brenneman, Tracy Maahs, Lee Swanstrom
  • Publication number: 20040176699
    Abstract: A flexible thermography catheter which includes an elongated body having a proximal end, a distal end, and a distal section, an expandable body comprising at least one independently movable support arm located at the distal section of the elongated body, at least one support arm retainer positioned on the distal section of the elongated body, and at least one sensor positioned on at least one of the distal section, the expandable body, and the at least one support arm. The at least one support arm retainer is configured to independently secure at least one section of the at least one support arm to the distal section of the elongated body in independently movable relation to each of the at least one support arm and the elongated body.
    Type: Application
    Filed: March 3, 2003
    Publication date: September 9, 2004
    Applicant: Volcano Therapeutics, Inc.
    Inventors: Blair Walker, Tracy Maahs, Jesus Flores
  • Publication number: 20040073132
    Abstract: A thermography system that can be used in the vasculature of a patient, or elsewhere, with a catheter and an instrument configured to graphically display thermography data from the catheter. Sensors on the catheter may measure blood temperature, wall temperature of a body vessel or both as well as differences between blood temperature and wall temperature. Temperature differences from different locations of a patient's body vessel can be measured contemporaneously, compared and displayed on the graphical display which may be a graphic user interface in some embodiments.
    Type: Application
    Filed: May 7, 2003
    Publication date: April 15, 2004
    Inventors: Tracy Maahs, Jesus Flores, Thomas H. Campbell, Duane Dickens