Duy Chau Nguyen

US Patent:

8182467, May 22, 2012

Filed:

Sep 29, 2009

Appl. No.:

12/569786

Inventors:

Duy Nguyen - Corona CA, US
Sheldon Nelson - Plymouth MN, US
Elizabeth Nee - Minneapolis MN, US
Guy P. Vanney - Blaine MN, US

Assignee:

St. Jude Medical, Atrial Fibrillation Division, Inc. - St. Paul MN

International Classification:

A61B 5/04
A61B 18/18
A61M 25/00
A61M 31/00
A61M 37/00

US Classification:

604528, 600374, 600585, 604523, 604 9504, 606 41

Abstract:

The invention provides a deflectable catheter capable of forming many variable radius spiral forms from a single, flexible, distal end section. In one aspect, the catheter employs a variable radius control wire to extend or deform a pre-formed loop structure into a three dimensional spiral-like form or geometry. The ability of a single catheter to create a multitude of shapes and sizes allows users to access to a number of anatomical areas without changing the catheter during a procedure or treatment. In another aspect, the invention encompasses methods of producing deflectable variable radius catheters, where two or more regions of the catheter having common control wires are fused or formed onto one another.

US Patent:

20070270679, Nov 22, 2007

Filed:

Dec 29, 2006

Appl. No.:

11/647311

Inventors:

Duy Nguyen - Corona CA, US
Sheldon Nelson - Plymouth MN, US
Elizabeth Nee - Minneapolis MN, US
Guy Vanney - Blaine MN, US

International Classification:

A61M 25/00

US Classification:

600373000, 600585000, 604523000

Abstract:

The invention provides a deflectable catheter capable of forming many variable radius spiral forms from a single, flexible, distal end section. In one aspect, the catheter employs a variable radius control wire to extend or deform a pre-formed loop structure into a three dimensional spiral-like form or geometry. The ability of a single catheter to create the multitude of shapes and sizes possible allows users to access a greater number of anatomical areas without changing the catheter during a procedure or treatment. In another aspect, the invention encompasses methods of producing deflectable variable radius catheters, where two or more regions of the catheter having common control wires are fused or formed onto one another.

US Patent:

20080065205, Mar 13, 2008

Filed:

Sep 11, 2006

Appl. No.:

11/519519

Inventors:

Duy Nguyen - Corona CA, US
Kim Nguyen - Irvine CA, US

International Classification:

A61F 2/24

US Classification:

623 236

Abstract:

The invention is a device, and method for deploying same, configured for placement in a body lumen such as a coronary sinus, as may be desired to repair a mitral valve. The device includes a first anchor, a second anchor, and a bridge. The anchors are configured to delivered to a desired deployment site within the body lumen in a collapsed or contracted condition, and then be deployed by expanding the anchors into contact with the walls of the body lumen. One or more of the anchors may be configured to be radially collapsible after initial deployment in order to permit the anchor(s) to be repositioned in or removed from the body lumen. An anchor may be collapsible in response to a distal force applied to a portion of a proximal end thereof. A catheter for use with the implant is configured to deliver the implant to the site with the anchors in their respective collapsed configurations, and to release the anchors to permit them to expand into contact with the walls of the body lumen. The catheter is configured to apply a proximal force to one or both anchors, which may be applied via a cinch wire. The catheter may also be configured to apply a distal force against a portion of the proximal end of one or more of the anchors.

US Patent:

20080255447, Oct 16, 2008

Filed:

Apr 16, 2007

Appl. No.:

11/735722

Inventors:

Henry Bourang - Irvine CA, US
William R. Wertenberg - Newport Beach CA, US
Ronald J. Hosmer - Mission Viejo CA, US
Christopher Buller - Vancouver, CA
Duy Nguyen - Corona CA, US

International Classification:

A61M 25/01

US Classification:

600434

Abstract:

A diagnostic catheter having both a guidewire lumen and at least one contrast lumen is disclosed. In one embodiment, the contrast lumens allow the user to deliver contrast to a target area within the patient without removing the guidewire. Preferably, a plurality of contrast exit ports are included along the length of the catheter body to evenly and consistently distribute contrast into the blood stream, thereby providing improved visualization during radioscopy.

US Patent:

20100094392, Apr 15, 2010

Filed:

Oct 10, 2008

Appl. No.:

12/249867

Inventors:

Duy Nguyen - Corona CA, US
Kim Nguyen - Irvine CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

A61F 2/06
A61B 19/00

US Classification:

623 111, 128898

Abstract:

Embodiments of an expandable sheath can be used in conjunction with a catheter assembly to introduce a prosthetic device, such as a tissue heart valve, into a patient. Such embodiments can minimize trauma to the vessel by allowing for temporary expansion of a portion of the introducer sheath to accommodate the delivery apparatus, followed by a return to the original diameter once the prosthetic device passes through. Some embodiments can comprise a sheath with inner and outer tubular layers, and an intermediate tubular layer comprising a shape memory alloy. Other embodiments comprise one or more layers having one or more longitudinal notches or cuts to facilitate expansion of the sheath. Embodiments of the present expandable sheath can avoid the need for multiple insertions for the dilation of the vessel, thus offering advantages over prior art introducer sheaths.

US Patent:

20120083877, Apr 5, 2012

Filed:

Dec 6, 2011

Appl. No.:

13/312739

Inventors:

Duy Nguyen - Corona CA, US
Kim Nguyen - Irvine CA, US
Thanh V. Nguyen - Irvine CA, US

International Classification:

A61F 2/24
B29C 53/08

US Classification:

623 211, 156211

Abstract:

Embodiments of an expandable sheath can be used in conjunction with a catheter assembly to introduce a prosthetic device, such as a heart valve, into a patient. Such embodiments can minimize trauma to the vessel by allowing for temporary expansion of a portion of the introducer sheath to accommodate the delivery apparatus, followed by a return to the original diameter once the prosthetic device passes through. Some embodiments can include a sheath with inner and outer layers, where a folded portion of the inner layer extends through a slit in the outer layer and a portion of the outer layer overlaps the folded portion of the inner layer. Some embodiments include an elastic outer cover positioned outside the outer layer. Embodiments of the present expandable sheath can avoid the need for multiple insertions for the dilation of the vessel, thus offering advantages over prior art introducer sheaths.

US Patent:

20120184901, Jul 19, 2012

Filed:

Mar 26, 2012

Appl. No.:

13/430428

Inventors:

Duy Nguyen - Corona CA, US
Sheldon Nelson - Plymouth MN, US
Elizabeth Nee - Minneapolis MN, US
Guy P. Vanney - Blaine MN, US

International Classification:

A61M 25/092

US Classification:

604 9504

Abstract:

The invention provides a deflectable catheter capable of forming many variable radius spiral forms from a single, flexible, distal end section. In one aspect, the catheter employs a variable radius control wire to extend or deform a pre-formed loop structure into a three dimensional spiral-like form or geometry. The ability of a single catheter to create a multitude of shapes and sizes allows users to access to a number of anatomical areas without changing the catheter during a procedure or treatment. In another aspect, the invention encompasses methods of producing deflectable variable radius catheters, where two or more regions of the catheter having common control wires are fused or formed onto one another.

US Patent:

20200397501, Dec 24, 2020

Filed:

Sep 4, 2020

Appl. No.:

17/013052

Inventors:

- Rancho Santa Margarita CA, US
Michael Whitlock - Irvine CA, US
Patrick Elliott - Rancho Santa Margarita CA, US
Duy Nguyen - Rancho Santa Margarita CA, US
Aaron Jimenez - Rancho Santa Margarita CA, US
Andrea Chan - Rancho Santa Margarita CA, US
Vanna Lee - Trabuco Canyon CA, US

International Classification:

A61B 18/14
A61B 18/12

Abstract:

A bipolar electrosurgical fusion/sealer and dissector is provided that is arranged to simultaneously fuse and cut tissue captured between jaws of the instrument. The jaws include particularly positioned, shaped and/or oriented electrodes along with a compressible landing pad to perform the simultaneous fusion and cutting of tissue. An electrosurgical generator is arranged to supply RF energy through the instrument and monitors a phase angle of the supplied RF energy and adjusts or terminates the supplied RF energy based on the monitored phase angle to optimally fuse and dissect the tissue.