Hengchu C Cao

US Patent:

8219229, Jul 10, 2012

Filed:

Feb 28, 2007

Appl. No.:

11/680519

Inventors:

Hengchu Cao - Irvine CA, US
Wei Sun - Irvine CA, US

Assignee:

Edwards Lifesciences Corporation - Irvine CA

International Classification:

G06F 19/00

US Classification:

700 98, 700118

Abstract:

A computational technique to construct a 3-D valve leaflet geometry. The invention pertains to methodology to construct a 3-D heart valve leaflet geometry using finite element analysis (FEA) to simulate the manual assembly process or, in other words, provide a virtual assembly process as an input to a subsequent simulated valve testing step. The simulated valves may be subjected to simulated cyclic valve opening and closings and the stress levels induced therein monitored. Simulated valve designs with lower principal stresses can then be selected for prototyping. Proposed valves can be subjected to cyclic fatigue stress testing under simulated physiologic conditions to study valve durability.

US Patent:

20110276128, Nov 10, 2011

Filed:

May 10, 2011

Appl. No.:

13/104648

Inventors:

Hengchu Cao - Irvine CA, US
Brian Conklin - Orange CA, US
Paul Schmidt - Irvine CA, US
Grace Myong Kim - Garden Grove CA, US
James A. Davidson - San Juan Capistrano CA, US
Hoa Trinh Tran - Irvine CA, US
Kristy Luong Tam - Anaheim CA, US

International Classification:

A61F 2/24

US Classification:

623 211, 623 218, 623 241

Abstract:

Disclosed prosthetic valves can comprise a sewing ring configured to secure the valve to an implantation site. Some disclosed valves comprise a resiliently collapsible frame having a neutral configuration and a collapsed deployment configuration. Some disclosed frames can self-expand to the neutral configuration when released from the collapsed deployment configuration. Collapsing a disclosed valve can provide convenient access to the sewing ring, such as for securing the valve to the implantation site, as well as for the insertion of the valve through relatively small surgical incisions.

US Patent:

20110282440, Nov 17, 2011

Filed:

May 11, 2011

Appl. No.:

13/105469

Inventors:

Hengchu Cao - Irvine CA, US
Wei Sun - South Windsor CT, US

Assignee:

EDWARDS LIFESCIENCES CORPORATION - Irvine CA

International Classification:

A61F 2/24

US Classification:

623 218, 623 217

Abstract:

A low pressure gradient prosthetic heart valve for implant in a human. The valve includes a support frame with undulating inflow cusps and outflow commissure posts to which flexible leaflets attach and coapt in a flow area. The commissure posts angle outward in a neutral state to widen the outflow orifice area. Also, the leaflets are designed to fit within the support frame and expand outward in a valve open state without creating a shelf or belly that would restrict flow.

US Patent:

20140031864, Jan 30, 2014

Filed:

Jul 9, 2013

Appl. No.:

13/938071

Inventors:

Ming H. Wu - Tustin CA, US
Hengchu Cao - Irvine CA, US
Ralph Schneider - Irvine CA, US

International Classification:

A61B 17/04

US Classification:

606232

Abstract:

Disclosed herein are exemplary embodiments of suture securement devices that replace the need to tie knots in sutures. Some embodiments comprise an annular outer body and one or more suture engagement tabs extending inwardly from the outer body. The devices can comprise a superelastic and/or shape-memory material and have a generally in-plane initial configuration. The suture engagement portions are deformable out-of-plane to an active configuration with the outer body compressed and the tabs interlocked with each other. The device can be heat-set in the deformed configuration. The interlocked tabs exert a pinching force on sutures passing between them that restricts the sutures from sliding through the opening in one longitudinal direction.

US Patent:

61589845, Dec 12, 2000

Filed:

Dec 28, 1998

Appl. No.:

9/221094

Inventors:

Hengchu Cao - Roseville CA
David M. Lancisi - Folsom CA

Assignee:

Kriton Medical, Inc. - Sacramento CA

International Classification:

F04B 1700
A61M 3700

US Classification:

4174231

Abstract:

An implantable rotary blood pump including a rotor mounted for rotation within a pump housing. The rotor has a shaft portion and an impeller carried by the shaft portion. A rotor motor is provided, with a motor including a plurality of permanent magnets carried by the impeller and motor stators on opposite sides of the impeller. Structural members are provided between the impeller and stators to provide structural support and hermetical sealing. The structural members comprise biocompatible, corrosion resistant, electrically non-conducting ceramic material, which alleviate eddy current losses.

US Patent:

20220241072, Aug 4, 2022

Filed:

Apr 18, 2022

Appl. No.:

17/723266

Inventors:

- Irvine CA, US
Nima V. Nia - Mission Viejo CA, US
Amanda Tjipta Sugijoto - San Ramon CA, US
Hengchu Cao - Irvine CA, US
Sakyasingh Tripathy - San Diego CA, US
Douglas Thomas Dominick - Irvine CA, US

International Classification:

A61F 2/24
A61B 17/04

Abstract:

A method comprises anchoring a first suture to a first papillary muscle, anchoring the first suture to a ventricle wall, and cinching the first suture to cause the first papillary muscle to move closer to the ventricle wall.

US Patent:

20220226110, Jul 21, 2022

Filed:

Apr 1, 2022

Appl. No.:

17/657732

Inventors:

- Irvine CA, US
Eran Goldberg - Nesher, IL
David Maimon - Atlit, IL
Adi Carmi - Ganei Tikva, IL
Arie Tylis - Kiryat Motzkin, IL
Ralph Schneider - Trabuco Canyon CA, US
Mohammad Jafari - Foothill Ranch CA, US
Hengchu Cao - Irvine CA, US
Eitan Atias - Tel Aviv, IL

International Classification:

A61F 2/24

Abstract:

An expandable docking station includes an annular valve seat having an end, an annular outer wall comprising struts disposed around the valve seat, and links that connect the end of the annular valve seat to the annular outer wall. Each of the links extends from the struts of the annular outer wall directly toward a longitudinal axis that runs longitudinally through a center of the docking station, and to a corresponding one of a plurality of circumferentially spaced axially extending legs at least partially defining the annular valve seat. The outer wall is configured to conform to an interior shape of a blood vessel, when expanded inside the blood vessel, such that the outer wall can expand in multiple locations to conform to multiple bulges of the blood vessel and can contract in multiple locations to conform to multiple narrowed regions of the blood vessel.

US Patent:

20210378817, Dec 9, 2021

Filed:

Aug 24, 2021

Appl. No.:

17/410732

Inventors:

- Irvine CA, US
Hengchu Cao - Irvine CA, US
Sakyasingh Tripathy - San Diego CA, US
Douglas Thomas Dominick - Irvine CA, US
Bingquan Su - Irvine CA, US

International Classification:

A61F 2/24

Abstract:

A double heart valve anchoring system can include a first anchor having at least a portion configured to be secured within a first trans-septal opening in an interventricular septum, a tricuspid valve device coupled to the first anchor, and a mitral valve device coupled to the first anchor.