Patents by Inventor Hongzhi Bai

Hongzhi Bai 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: 20080103478
    Abstract: Embodiments include an infusion-occlusion system having a delivery catheter, a guide catheter adapted to receive the delivery catheter, and a guidewire with an occlusion device adapted to be received within the guide catheter. The guide catheter of the catheter kit may be provided with an occlusion device at the distal end of the guide catheter. The delivery catheter may have an accessory lumen, coaxial or co-linear lumen, a supporting mandrel, or an occlusion device at its distal end. Moreover, according to some embodiments, occlusion devices may be a single material or a composite balloon having an inner liner and an outer layer of different materials, a high compliance low pressure balloon, or a filter device that restricts particles from passing through but does not restrict fluid, such as blood. An inflation device with a large volume and low volume syringe can be used to inflate the balloon.
    Type: Application
    Filed: October 24, 2007
    Publication date: May 1, 2008
    Inventors: Jessica Chiu, Gregory Chan, Gabriel Asongwe, Robert Esselstein, Douglas Gesswein, Srinivasan Sridharan, Nianjiong Bei, William Webler, Stephen Schaible, Mina Chow, Yan Shen, Hongzhi Bai, Mark Bly, Thomas Hatten
  • Publication number: 20080041516
    Abstract: Embodiments include an infusion-occlusion system having a delivery catheter, a guide catheter adapted to receive the delivery catheter, and a guidewire with an occlusion device adapted to be received within the guide catheter. The guide catheter of the catheter kit may be provided with an occlusion device at the distal end of the guide catheter. The delivery catheter may have an accessory lumen, coaxial or co-linear lumen, a supporting mandrel, or an occlusion device at its distal end. Moreover, according to some embodiments, occlusion devices may be a single material or a composite balloon having an inner liner and an outer layer of different materials, a high compliance low pressure balloon, or a filter device that restricts particles from passing through but does not restrict fluid, such as blood. An inflation device with a large volume and low volume syringe can be used to inflate the balloon.
    Type: Application
    Filed: October 24, 2007
    Publication date: February 21, 2008
    Inventors: Jessica Chiu, Gregory Chan, Gabriel Asongwe, Robert Esselstein, Douglas Gesswein, Srinivasan Sridharan, Nianjiong Bei, William Webler, Stephen Schaible, Mina Chow, Yan Shen, Hongzhi Bai, Mark Bly, Thomas Hatten
  • Publication number: 20070208297
    Abstract: In one embodiment, there is disclosed a device adapted to be used for percutaneous minimally invasive heart surgery including a catheter having a proximal end and a distal end adapted to be fed through a blood vessel, a pump associated with the distal end of the catheter, and a tool associated with the distal end of the catheter. The tool is adapted to be used for percutaneous minimally invasive heart surgery. Examples of the tools include a tool for excising natural tissue, a tool for excising a natural valve, and anthretomy device, a prosthetic valve delivery system, a balloon catheter, a knife, a stapler, and a screwdriver. The pump is used for maintaining blood flow around the site of the heart surgery while the surgery is taking place without the use of cardiopulmonary bypass.
    Type: Application
    Filed: May 9, 2007
    Publication date: September 6, 2007
    Inventors: Robert Ainsworth, Hongzhi Bai, Greg Hyde
  • Publication number: 20070208298
    Abstract: In one embodiment, there is disclosed a device adapted to be used for percutaneous minimally invasive heart surgery including a catheter having a proximal end and a distal end adapted to be fed through a blood vessel, a pump associated with the distal end of the catheter, and a tool associated with the distal end of the catheter. The tool is adapted to be used for percutaneous minimally invasive heart surgery. Examples of the tools include a tool for excising natural tissue, a tool for excising a natural valve, and anthretomy device, a prosthetic valve delivery system, a balloon catheter, a knife, a stapler, and a screwdriver. The pump is used for maintaining blood flow around the site of the heart surgery while the surgery is taking place without the use of cardiopulmonary bypass.
    Type: Application
    Filed: May 9, 2007
    Publication date: September 6, 2007
    Inventors: Robert Ainsworth, Hongzhi Bai, Greg Hyde
  • Patent number: 7250041
    Abstract: A delivery catheter that includes a flexible shaft having a proximal end and a distal end, the distal end having an outer diameter less than about 13 mm; a delivery lumen having a proximal end and a distal end, the delivery lumen within the flexible shaft, the delivery lumen having at least an outlet port or at least one side hole at the distal end of the delivery lumen, the delivery lumen having a cross-sectional area at least about 5 mm2; a pressure monitoring lumen having a proximal end and a distal end, the pressure monitoring lumen within the flexible shaft; a pressure port adjacent to and connected to the distal end of the pressure monitoring lumen; a balloon inflation lumen having a proximal end and a distal end, the balloon inflation lumen within the flexible shaft; a soft tip at the distal end of the flexible shaft; a balloon at the distal end of the flexible shaft, the balloon connected to the distal end of the balloon inflation lumen, the balloon includes at least one of the following materials, po
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: July 31, 2007
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Jessica Chiu, Gregory Waimong Chan, Hongzhi Bai, Nianjiong J. Bei, Mark J. Bly, Srinivasan Sridharan, Tom Hatten
  • Patent number: 7241257
    Abstract: In one embodiment, there is disclosed a device adapted to be used for percutaneous minimally invasive heart surgery including a catheter having a proximal end and a distal end adapted to be fed through a blood vessel, a pump associated with the distal end of the catheter, and a tool associated with the distal end of the catheter. The tool is adapted to be used for percutaneous minimally invasive heart surgery. Examples of the tools include a tool for excising natural tissue, a tool for excising a natural valve, and anthretomy device, a prosthetic valve delivery system, a balloon catheter, a knife, a stapler, and a screwdriver. The pump is used for maintaining blood flow around the site of the heart surgery while the surgery is taking place without the use of cardiopulmonary bypass.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: July 10, 2007
    Assignee: Abbott Cardiovascular Systems, Inc.
    Inventors: Robert D. Ainsworth, Hongzhi Bai, Greg Hyde
  • Publication number: 20070106258
    Abstract: A delivery catheter that includes a flexible shaft having a proximal end and a distal end, the distal end having an outer diameter less than about 13 mm; a delivery lumen having a proximal end and a distal end, the delivery lumen within the flexible shaft, the delivery lumen having at least an outlet port or at least one side hole at the distal end of the delivery lumen, the delivery lumen having a cross-sectional area at least about 5 mm2; a pressure monitoring lumen having a proximal end and a distal end, the pressure monitoring lumen within the flexible shaft; a pressure port adjacent to and connected to the distal end of the pressure monitoring lumen; a balloon inflation lumen having a proximal end and a distal end, the balloon inflation lumen within the flexible shaft; a soft tip at the distal end of the flexible shaft; a balloon at the distal end of the flexible shaft, the balloon connected to the distal end of the balloon inflation lumen, the balloon includes at least one of the following materials, po
    Type: Application
    Filed: December 11, 2006
    Publication date: May 10, 2007
    Inventors: Jessica Chiu, Gregory Chan, Hongzhi Bai, Nianjiong Bei, Mark Bly, Srinivasan Sridharan, Tom Hatten
  • Publication number: 20050015048
    Abstract: Embodiments include an infusion-occlusion system having a delivery catheter, a guide catheter adapted to receive the delivery catheter, and a guidewire with an occlusion device adapted to be received within the guide catheter. The guide catheter of the catheter kit may be provided with an occlusion device at the distal end of the guide catheter. The delivery catheter may have an accessory lumen, coaxial and/or co-linear lumen, a supporting mandrel, and/or an occlusion device at its distal end. Moreover, according to embodiments, occlusion devices may be a single material or a composite balloon having an inner liner and an outer layer of different materials, a high compliance low pressure balloon, and/or a filter device that restricts particles from passing through but does not restrict fluid, such as blood. An inflation device with a large volume and low volume syringe can be used to inflate the balloon.
    Type: Application
    Filed: March 11, 2004
    Publication date: January 20, 2005
    Inventors: Jessica Chiu, Gregory Chan, Gabriel Asongwe, Robert Esselstein, Douglas Gesswein, Srinivasan Sridharan, Nianjiong Bei, William Webler, Stephen Schaible, Mina Chow, Yan Shen, Hongzhi Bai, Mark Bly, Thomas Hatten
  • Publication number: 20040181206
    Abstract: A delivery catheter that includes a flexible shaft having a proximal end and a distal end, the distal end having an outer diameter less than about 13 mm; a delivery lumen having a proximal end and a distal end, the delivery lumen within the flexible shaft, the delivery lumen having at least an outlet port or at least one side hole at the distal end of the delivery lumen, the delivery lumen having a cross-sectional area at least about 5 mm2; a pressure monitoring lumen having a proximal end and a distal end, the pressure monitoring lumen within the flexible shaft; a pressure port adjacent to and connected to the distal end of the pressure monitoring lumen; a balloon inflation lumen having a proximal end and a distal end, the balloon inflation lumen within the flexible shaft; a soft tip at the distal end of the flexible shaft; a balloon at the distal end of the flexible shaft, the balloon connected to the distal end of the balloon inflation lumen, the balloon includes at least one of the following materials, po
    Type: Application
    Filed: March 12, 2003
    Publication date: September 16, 2004
    Inventors: Jessica G. Chiu, Gregory Waimong Chan, Hongzhi Bai, Nianjiong J. Bei, Mark J. Bly, Srinivasan Sridharan, Tom Hatten