Vivian T Tran

US Patent:

8639310, Jan 28, 2014

Filed:

Feb 27, 2013

Appl. No.:

13/778900

Inventors:

Peter C. Chen - Irvine CA, US
Alan de la Rama - Cerritos CA, US
Cary K. Hata - Irvine CA, US
Vivian Tran - Laguna Niguel CA, US

Assignee:

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

International Classification:

A61B 5/04
A61B 18/04
A61B 18/14

US Classification:

600374, 600381, 606 27, 606 41

Abstract:

The disclosure relates to a variety of systems and methods for sensing electrical events about a selected annulus region of the heart and for treating tissue in the selected annulus region. Wherein the system includes a first catheter that has an expandable member, an ablation element, and a lumen configured to allow a second catheter therethrough. The second catheter includes a distal section in a ring shape and a plurality of electrodes coupled around the ring. Optionally a second lumen can be included through the first catheter that allows for contrast media to be delivered to the distal end of the system.

US Patent:

20050004441, Jan 6, 2005

Filed:

Jul 22, 2004

Appl. No.:

10/897887

Inventors:

Peter Chen - Irvine CA, US
Alan de la Rama - Cerritos CA, US
Cary Hata - Tustin CA, US
Vivian Tran - Santa Ana CA, US

International Classification:

A61B018/04
A61B018/04

US Classification:

600374000, 606027000

Abstract:

A catheter for sensing electrical events about a selected annulus region of the heart and for treating tissue in the selected annulus region has a handle assembly, and a shaft having a proximal end coupled to the handle assembly. The catheter also has a mapping element provided adjacent its distal end, and an ablation element positioned spaced apart along the shaft from the mapping element. The mapping element is first positioned distally to the desired treatment location in the selected annulus region and the distal location is mapped. The expandable member enclosing the ablation element is inflated and contrast medium injected to determine the orientation of the ablation element with respect to the annulus region. After the target ablation site is determined and the PV potentials verified, the ablation element is activated for therapeutic energy delivery.

US Patent:

20050256518, Nov 17, 2005

Filed:

May 15, 2004

Appl. No.:

10/845798

Inventors:

Alan Rama - Cerritos CA, US
Tho Nguyen - Huntington Beach CA, US
Vivian Tran - Santa Ana CA, US
Cary Hata - Tustin CA, US
Peter Chen - Irvine CA, US

International Classification:

A61B018/04
A61B005/04

US Classification:

606027000, 600374000

Abstract:

A catheter for ablating body tissue of the interior regions of the heart includes a handle assembly, a shaft, and a distal tip section coupled to the distal end of the shaft. The distal tip section has a non-compliant and non-porous cap that has a tubular wall that defines a bore, and an ablation element that is housed inside the bore and spaced apart from the wall of the cap.

US Patent:

20070038056, Feb 15, 2007

Filed:

Oct 19, 2006

Appl. No.:

11/583263

Inventors:

Carlo Pappone - Lecco, IT
Peter Chen - Irvine CA, US
Alan de la Rama - Cerritos CA, US
Cary Hata - Irvine CA, US
Vivian Tran - Santa Ana CA, US
David Chi - Irvine CA, US

International Classification:

A61B 18/04
A61B 5/04

US Classification:

600374000, 600381000, 606027000, 606041000

Abstract:

A catheter for sensing electrical events about a selected annulus region of the heart and for treating tissue in the selected annulus region has a handle assembly, a shaft having a proximal end coupled to the handle assembly, a first expandable member provided at the distal end of the shaft, and a second expandable member positioned adjacent to, but spaced apart from, the first expandable member. The second expandable member has an ablation element that emits energy to a radially surrounding area to ablate tissue.

US Patent:

20080177205, Jul 24, 2008

Filed:

Oct 22, 2007

Appl. No.:

11/975822

Inventors:

Alan de la Rama - Cerritos CA, US
Tho Hoang Nguyen - Huntington Beach CA, US
Vivian Tran - Santa Ana CA, US
Cary K. Hata - Tustin CA, US
Peter C. Chen - Irvine CA, US

International Classification:

A61N 7/02

US Classification:

601 3

Abstract:

A catheter for ablating body tissue of the interior regions of the heart includes a handle assembly, a shaft, and a distal tip section coupled to the distal end of the shaft. The distal tip section has a non-compliant and non-porous cap that has a tubular wall that defines a bore, and an ablation element that is housed inside the bore and spaced apart from the wall of the cap.

US Patent:

20110137298, Jun 9, 2011

Filed:

Feb 2, 2011

Appl. No.:

13/019563

Inventors:

Tho Hoang NGUYEN - Huntington Beach CA, US
Cary HATA - Irvine CA, US
Alan DE LA RAMA - Cerritos CA, US
Vivian TRAN - Laguna Niguel CA, US
Peter C. CHEN - Irvine CA, US

Assignee:

ST. JUDE MEDICAL, INC. - St. Paul MN

International Classification:

A61B 17/00

US Classification:

606 1

Abstract:

An ablation apparatus comprises an ultrasonic transducer which includes a piezoelectric element having a cylindrical shape; a plurality of external electrodes disposed on the outer surface of the piezoelectric element; and at least one internal electrode disposed on the inner surface of the piezoelectric element. The at least one internal electrode provides corresponding internal electrode portions that are disposed opposite the external electrodes with respect to the piezoelectric element, the external electrodes and the at least one internal electrode to be energized to apply an electric field across the piezoelectric element. The ultrasonic ablation zones of the external electrodes are distributed in a staggered configuration so as to span one or more open arc segments around the longitudinal axis, and the ultrasound ablation zones of all external electrodes projected longitudinally onto any lateral plane which is perpendicular to the longitudinal axis span a substantially closed loop around the longitudinal axis.

US Patent:

20110230797, Sep 22, 2011

Filed:

Apr 20, 2011

Appl. No.:

13/090832

Inventors:

Peter C. Chen - Irvine CA, US
Alan de la Rama - Cerritos CA, US
Cary K. Hata - Irvine CA, US
Vivian Tran - Laguna Niguel CA, US

International Classification:

A61B 18/18
A61B 18/14
A61N 7/02

US Classification:

601 3, 606 41, 606 33

Abstract:

The disclosure relates to a variety of systems and methods for sensing electrical events about a selected annulus region of the heart and for treating tissue in the selected annulus region. Wherein the system includes a first catheter that has an expandable member, an ablation element, and a lumen configured to allow a second catheter therethrough. The second catheter includes a distal section in a ring shape and a plurality of electrodes coupled around the ring. Optionally a second lumen can be included through the first catheter that allows for contrast media to be delivered to the distal end of the system.

US Patent:

20220304722, Sep 29, 2022

Filed:

Jun 15, 2022

Appl. No.:

17/840694

Inventors:

- Tokyo, JP
Kosuke NISHIO - Irvine CA, US
Vivian TRAN - Irvine CA, US
Dan BAO - Irvine CA, US
Lam CANG - Irvine CA, US

Assignee:

TERUMO KABUSHIKI KAISHA - Tokyo

International Classification:

A61B 17/3207

Abstract:

A medical device that cuts an object in a body lumen includes: a drive shaft; a shaft portion connected to the drive shaft; a cutting portion connected to the shaft portion; and first and second bearings that rotatably support the shaft portion. The first bearing has a ring shape, the second bearing has a ring shape and is spaced from a proximal side of the first bearing. The shaft portion includes a first sliding portion slidably supported by the first bearing, a second sliding portion slidably supported by the second bearing, and an intermediate portion between the first and second sliding portions. The intermediate portion has a protruding portion protruding radially outward, the protruding portion is disposed between the first bearing () and the second bearing in an axial direction, and the shaft portion has a passage that communicates from the first sliding portion to the second sliding portion).