Helen Nguyen

US Patent:

20120259404, Oct 11, 2012

Filed:

Dec 5, 2011

Appl. No.:

13/311430

Inventors:

Tai D. Tieu - Fountain Valley CA, US
Gregory M. Cruise - Rancho Santa Margarita CA, US
Heather Griffith - Orange CA, US
Helen Nguyen - Carson CA, US
Minh Nguyen - Stanton CA, US
Ponaka Pung - Signal Hill CA, US
Shirley Vong - West Covina CA, US

International Classification:

A61F 2/06

US Classification:

623 115

Abstract:

In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.

US Patent:

20100268204, Oct 21, 2010

Filed:

Apr 15, 2010

Appl. No.:

12/761113

Inventors:

Tai D. Tieu - Fountain Valley CA, US
Hideo Morita - Irvine CA, US
Helen Nguyen - Tustin CA, US

International Classification:

A61B 18/04
A61B 17/00

US Classification:

606 27, 606108

Abstract:

A system and method of delivering and detaching an implant within a body of a patient is described. A tether connects an implant with a delivery device. The delivery device includes a heater coil through which the tether passes. The inner diameter of the heater coil is about the same size or slightly larger than the outer diameter of the tether, allowing the tether to more efficiently break the tether during delivery.

US Patent:

20100268201, Oct 21, 2010

Filed:

Apr 15, 2010

Appl. No.:

12/761187

Inventors:

Tai D. Tieu - Fountain Valley CA, US
Hideo Morita - Irvine CA, US
Helen Nguyen - Tustin CA, US

International Classification:

A61B 17/00

US Classification:

606 1

Abstract:

In one embodiment, the present invention relates to a mechanically releasable delivery system. More specifically, this embodiment includes an implantable device secured by tether at a distal end of the delivery system. The tether is fixed to the implantable device and looped around a selectively slidable mandrel. When the mandrel is retracted to expose its distal end, the looped tether slides off the mandrel, freeing the implantable device. Alternately, the tether can be fixed to the delivery system, wrapped around a portion of the implantable device and looped on to the slidable mandrel. Preferably, movement of the mandrel is controlled by an actuation control on the handle of the delivery system, allowing the user to selectively release the implantable device during a medical procedure.

US Patent:

20210220158, Jul 22, 2021

Filed:

Apr 2, 2021

Appl. No.:

17/221641

Inventors:

- Aliso Viejo CA, US
Tai D. Tieu - Aliso Viejo CA, US
Ross Soltanian - Aliso Viejo CA, US
Helen Nguyen - Aliso Viejo CA, US
Oanh Nguyen - Aliso Viejo CA, US
Britney Ngo - Aliso Viejo CA, US

Assignee:

MicroVention, Inc. - Aliso Viejo CA

International Classification:

A61F 2/966
A61F 2/82

Abstract:

Implant engagement mechanisms are disclosed for maintaining engagement with a stent until it has been fully deployed and expanded from a catheter or sheath. The apparatus, method and system involving these engagement mechanisms allow a physician to withdraw or retract a sheath prior to full deployment, thereby allowing for redeployment of the stent at a more desirable position.

US Patent:

20210161539, Jun 3, 2021

Filed:

Feb 16, 2021

Appl. No.:

17/177020

Inventors:

- Aliso Viejo CA, US
Hideo Morita - Aliso Viejo CA, US
Helen Nguyen - Aliso Viejo CA, US

Assignee:

MicroVention, Inc. - Aliso Viejo CA

International Classification:

A61B 17/12
A61F 2/01
A61B 90/00
A61F 2/95

Abstract:

A system and method of delivering and detaching an implant within a body of a patient is described. A tether connects an implant with a delivery device. The delivery device includes a heater coil through which the tether passes. The inner diameter of the heater coil is about the same size or slightly larger than the outer diameter of the tether, allowing the tether to more efficiently break the tether during delivery.

US Patent:

20210030570, Feb 4, 2021

Filed:

Sep 15, 2020

Appl. No.:

17/021907

Inventors:

- Aliso Viejo CA, US
Helen Nguyen - Carson CA, US
Tai D. Tieu - Fountain Valley CA, US

Assignee:

MicroVention, Inc. - Aliso Viejo CA

International Classification:

A61F 2/88
A61F 2/90

Abstract:

A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.

US Patent:

20200315828, Oct 8, 2020

Filed:

Jun 24, 2020

Appl. No.:

16/910400

Inventors:

- Aliso Viejo CA, US
Helen Nguyen - Garden Grove CA, US

Assignee:

MicroVention, Inc. - Aliso Viejo CA

International Classification:

A61F 2/966
A61F 2/01
A61F 2/90

Abstract:

Disclosed is a method, apparatus, and kit for assisting the expansion of a self-expanding stent, especially within highly curved or tortuous blood vessels. An elongated pusher having an expandable distal mesh portion can be positioned within a self-expanding stent, expanding during delivery to provide extra expansion force to the stent to ensure the stent properly expands.

US Patent:

20190142617, May 16, 2019

Filed:

Jan 10, 2019

Appl. No.:

16/244910

Inventors:

- Aliso Viejo CA, US
Tai D. Tieu - Fountain Valley CA, US
Ross Soltanian - Glendale CA, US
Helen Nguyen - Garden Grove CA, US
Oanh Nguyen - Tustin CA, US
Britney Ngo - Garden Grove CA, US

Assignee:

MicroVention, Inc. - Aliso Viejo CA

International Classification:

A61F 2/966
A61F 2/82

Abstract:

Implant engagement mechanisms are disclosed for maintaining engagement with a stent until it has been fully deployed and expanded from a catheter or sheath. The apparatus, method and system involving these engagement mechanisms allow a physician to withdraw or retract a sheath prior to full deployment, thereby allowing for redeployment of the stent at a more desirable position.