Patents by Inventor K.T. Venkateswara Rao

K.T. Venkateswara Rao 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: 20190231515
    Abstract: A system for treating an aneurysm includes a first double-walled filling structure having an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a generally tubular lumen to permit blood flow therethrough. The inner wall comprises a blood contacting layer and a reinforcing layer. The reinforcing layer prevents circumferential creep or elastic expansion of the lumen.
    Type: Application
    Filed: April 11, 2019
    Publication date: August 1, 2019
    Inventors: K.T. Venkateswara Rao, Raj P. Ganpath, Amy Lee, Anupama Karwa
  • Publication number: 20180028192
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Application
    Filed: August 14, 2017
    Publication date: February 1, 2018
    Inventors: Steven L. Herbowy, Michael A Evans, Anant Kumar, K.T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Patent number: 9730700
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: August 15, 2017
    Assignee: Nellix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K. T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Publication number: 20150216535
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Application
    Filed: April 23, 2015
    Publication date: August 6, 2015
    Inventors: STEVEN L. HERBOWY, MICHAEL A. EVANS, ANANT KUMAR, K.T. VENKATESWARA RAO, MATTHEW R. HELLEWELL, GIL LAROYA
  • Publication number: 20150148892
    Abstract: A system for treating an aneurysm comprises at least a first double-walled filling structure having an outer wall and an inner wall and the filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to the inside surface of the aneurysm and the inner surface forms a generally tubular lumen to provide blood flow. The first filling structure comprises a sealing feature which forms a fluid seal between the filling structure and the aneurysm or an adjacent endograft when the filling structure is filled with the hardenable fluid filling medium, thereby minimizing or preventing blood flow downstream of the seal.
    Type: Application
    Filed: February 2, 2015
    Publication date: May 28, 2015
    Inventors: RAJ P. GANPATH, AMY LEE, CRAIG ROSENBERG, SHERWIN LLAMIDO, STEVEN L. HERBOWY, MICHAEL A. EVANS, THOMAS HOWELL, CHARLES S. TAYLOR, K.T. VENKATESWARA RAO
  • Patent number: 8945199
    Abstract: A system for treating an aneurysm comprises at least a first double-walled filling structure having an outer wall and an inner wall and the filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to the inside surface of the aneurysm and the inner surface forms a generally tubular lumen to provide blood flow. The first filling structure comprises a sealing feature which forms a fluid seal between the filling structure and the aneurysm or an adjacent endograft when the filling structure is filled with the hardenable fluid filling medium, thereby minimizing or preventing blood flow downstream of the seal.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: February 3, 2015
    Assignee: Nellix, Inc.
    Inventors: Raj P. Ganpath, Amy Lee, Craig Rosenberg, Sherwin Llamido, Steven L. Herbowy, Michael A. Evans, Thomas A. Howell, Charles S. Taylor, K. T. Venkateswara Rao
  • Patent number: 8926682
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: January 6, 2015
    Assignee: Nellix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K. T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Patent number: 8801768
    Abstract: Aneurysms are treated by filling at least one double-walled filling structure with a filling medium within the aneurysm, such as filling structures having a membrane that allows water molecules to permeate across the membrane in response to a water potential differential across the membrane. The transport of fluid across the membrane allows the bag to expand or shrink to accommodate changes in the size or shape of the aneurysm, thereby maintaining a seal between the filling structure against the vessel wall and maintaining apposition of the filling structure against the inside surface of the aneurysm. Transport of water molecules into or out of the filling structure is controlled by adjusting for the osmolarity of the filling fluid medium. The filling structures may be delivered over balloon deployment mechanisms in order to shape occlude the aneurysm and open a tubular lumen for flow of blood through the filling structure.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: August 12, 2014
    Assignee: Endologix, Inc.
    Inventors: Anupama Karwa, Raj P. Ganpath, Clark K. Colton, K. T. Venkateswara Rao
  • Publication number: 20120203264
    Abstract: Aneurysms are treated by filling at least one double-walled filling structure with a filling medium within the aneurysm, such as filling structures having a membrane that allows water molecules to permeate across the membrane in response to a water potential differential across the membrane. The transport of fluid across the membrane allows the bag to expand or shrink to accommodate changes in the size or shape of the aneurysm, thereby maintaining a seal between the filling structure against the vessel wall and maintaining apposition of the filling structure against the inside surface of the aneurysm. Transport of water molecules into or out of the filling structure is controlled by adjusting for the osmolarity of the filling fluid medium. The filling structures may be delivered over balloon deployment mechanisms in order to shape occlude the aneurysm and open a tubular lumen for flow of blood through the filling structure.
    Type: Application
    Filed: January 23, 2012
    Publication date: August 9, 2012
    Applicant: Endologix, Inc.
    Inventors: Anupama Karwa, Raj P. Ganpath, Clark K. Colton, K.T. Venkateswara Rao
  • Patent number: 8182525
    Abstract: Aneurysms are treated by filling a double-walled filling structure with a curable medium. The structures may be delivered over balloon deployment mechanisms in order to shape and open tubular lumens therethrough. The filling structures are preferably used in pairs for providing flow into the iliac arteries when treating abdominal aortic aneurysm.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: May 22, 2012
    Assignee: Endologix, Inc.
    Inventors: Steven L. Herbowy, Matthew R. Hellewell, K. T. Venkateswara Rao, Michael A. Evans, Thomas Howell, Gwendolyn A. Watanabe, Bhupendra Shah, James McKinley
  • Patent number: 8128687
    Abstract: An intravascular stent having a prefabricated, patterned polymeric sleeve for controlled release of therapeutic drugs and for delivery of the therapeutic drugs in localized drug therapy in a blood vessel is disclosed. The polymeric sleeve is attached to at least a portion of an outside surface area of the stent structure. Alternatively, a plurality of individual microfilament strands are longitudinally attached to an outer surface of a stent structure in a spaced apart orientation and loaded with at least one therapeutic drug for the release thereof at a treatment site. The stent has a high degree of flexibility in the longitudinal direction, yet has adequate vessel wall coverage and radial strength sufficient to hold open an artery or other body lumen. Methods for making the same are also disclosed.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: March 6, 2012
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventor: K. T. Venkateswara Rao
  • Publication number: 20120016456
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Application
    Filed: September 23, 2011
    Publication date: January 19, 2012
    Applicant: Endologix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K.T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Publication number: 20110276078
    Abstract: A system for treating an aneurysm includes a first double-walled filling structure having an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a generally tubular lumen to permit blood flow therethrough. The inner wall comprises a blood contacting layer and a reinforcing layer. The reinforcing layer prevents circumferential creep or elastic expansion of the lumen.
    Type: Application
    Filed: December 13, 2010
    Publication date: November 10, 2011
    Applicant: Nellix, Inc.
    Inventors: K.T. Venkateswara Rao, Raj P. Ganpath, Amy Lee, Anupama Karwa
  • Patent number: 7674416
    Abstract: A hybrid stent is formed which exhibits both high flexibility and high radial strength. The expandable hybrid stent for implantation in a body lumen, such as a coronary artery, consists of radially expandable cylindrical rings generally aligned on a common longitudinal axis and interconnected by one or more links. In one embodiment, a dip-coated covered stent is formed by encapsulating cylindrical rings within a polymer material. In other embodiments, at least some of the rings and links are formed of a polymer material which provides longitudinal and flexural flexibility to the stent. These polymer rings and links are alternated with metallic rings and links in various configurations to attain sufficient column strength along with the requisite flexibility in holding open the target site within the body lumen. Alternatively, a laminated, linkless hybrid stent is formed by encapsulating cylindrical rings within a polymer tube.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: March 9, 2010
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: James Hong, Rahul Bhagat, Syed Hossainy, Santosh Prabhu, K. T. Venkateswara Rao, Ashok Shah, Srinivasan Sridharan
  • Publication number: 20100036360
    Abstract: A system for treating an aneurysm comprises an elongate flexible shaft and an expandable member. An expandable scaffold is disposed over the expandable member and may be expanded from a collapsed configuration to an expanded configuration. A double-walled filling structure is disposed over the scaffold and has an outer wall and an inner wall. The filling structure is adapted to be filled with a hardenable fluid filing medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow. In the expanded configuration the scaffold engages the inner wall of the filling structure. A tether is releasably coupled with the filling structure and the flexible shaft thereby constraining axial movement of the structures relative to each other.
    Type: Application
    Filed: April 24, 2009
    Publication date: February 11, 2010
    Applicant: Nellix, Inc.
    Inventors: Steven L. Herbowy, Michael A. Evans, Anant Kumar, K.T. Venkateswara Rao, Matthew R. Hellewell, Gil Laroya
  • Publication number: 20100004728
    Abstract: A prosthesis comprises a tubular body that is expandable from a contracted configuration to a radially expanded configuration. The tubular body has a total length and comprises a first section, a second section and a central section disposed therebetween. The total length of the tubular body in the expanded configuration is at least 95% of the total length of the tubular body in the contracted configuration. The three sections have a plurality of tubular rings, each with a plurality of struts having a length and coupled together to form a series of peaks and valleys. A connector couples adjacent tubular rings together. The length of the central section struts is different than the length of the other struts and the central section is coupled with both the first and second sections.
    Type: Application
    Filed: February 13, 2009
    Publication date: January 7, 2010
    Applicant: Nellix, Inc.
    Inventors: K.T. Venkateswara Rao, Anant Kumar, Ivan Tzvetanov
  • Publication number: 20090319029
    Abstract: A system for treating an aneurysm in a blood vessel comprises a docking scaffold having with upstream and downstream ends, and a central passageway therebetween. The upstream end engages the blood vessel upstream of the aneurysm. A portion of a first and second scaffolds are slidably received in the central passageway such that an outside surface of the first and second scaffolds engage an inside surface of the docking scaffold. A double-walled filling structure has outer and inner walls and the filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to an inside surface of the aneurysm and the inner wall forms a substantially tubular lumen to provide a path for blood flow therethrough. The double-walled filling structure is coupled with at least one of the first and second leg scaffolds in expanded configuration.
    Type: Application
    Filed: June 4, 2009
    Publication date: December 24, 2009
    Applicant: Nellix, Inc.
    Inventors: Michael A. Evans, Ivan Tzvetanov, Steven L. Herbowy, Raj P. Ganpath, Amy Lee, Anant Kumar, Gwendolyn A. Watanabe, K.T. Venkateswara Rao
  • Publication number: 20090318949
    Abstract: A system for treating an aneurysm comprises at least a first double-walled filling structure having an outer wall and an inner wall and the filling structure is adapted to be filled with a hardenable fluid filling medium so that the outer wall conforms to the inside surface of the aneurysm and the inner surface forms a generally tubular lumen to provide blood flow. The first filling structure comprises a sealing feature which forms a fluid seal between the filling structure and the aneurysm or an adjacent endograft when the filling structure is filled with the hardenable fluid filling medium, thereby minimizing or preventing blood flow downstream of the seal.
    Type: Application
    Filed: June 4, 2009
    Publication date: December 24, 2009
    Applicant: Nellix, Inc.
    Inventors: Raj P. Ganpath, Amy Lee, Craig Rosenberg, Sherwin Llamido, Steven L. Herbowy, Michael A. Evans, Thomas A. Howell, Charles S. Taylor, K.T. Venkateswara Rao
  • Patent number: 7435255
    Abstract: An intravascular stent having a prefabricated, patterned tubular sleeve portion for controlled release of therapeutic drugs and for delivery of the therapeutic drugs in localized drug therapy in a blood vessel is disclosed. The patterned sleeve may be releasably attached to at least a portion of an outer surface of the stent structure. Alternatively, a plurality of individual filament strands are longitudinally arranged around an outer surface of a stent structure in a spaced apart orientation and loaded with at least one therapeutic drug for the release thereof at a treatment site. The stent has a high degree of flexibility in the longitudinal direction, yet has adequate vessel wall coverage and radial strength sufficient to hold open an artery or other body lumen. Methods for making the same are also disclosed.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: October 14, 2008
    Assignee: Advnaced Cardiovascular Systems, Inc.
    Inventor: K. T. Venkateswara Rao
  • Patent number: 7144422
    Abstract: An intravascular stent having a prefabricated, patterned polymeric sleeve for controlled release of therapeutic drugs and for delivery of the therapeutic drugs in localized drug therapy in a blood vessel is disclosed. The polymeric sleeve is attached to at least a portion of an outside surface area of the stent structure. Alternatively, a plurality of individual microfilament strands are longitudinally attached to an outer surface of a stent structure in a spaced apart orientation and loaded with at least one therapeutic drug for the release thereof at a treatment site. The stent has a high degree of flexibility in the longitudinal direction, yet has adequate vessel wall coverage and radial strength sufficient to hold open an artery or other body lumen. Methods for making the same are also disclosed.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: December 5, 2006
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventor: K. T. Venkateswara Rao