Kenny Lee Dang

US Patent:

8623003, Jan 7, 2014

Filed:

Jul 13, 2012

Appl. No.:

13/549367

Inventors:

Liming Lau - Mountain View CA, US
Arthur M. Lin - Fremont CA, US
Samnuel Ho - Foster City CA, US
Ryan C. Abbott - San Jose CA, US
Kenny L. Dang - Laguna Niguel CA, US
Jesse McQuiston - San Carlos CA, US
Arnold M. Escano - Santa Clara CA, US
Jerry Jarrard - San Jose CA, US

Assignee:

Maquet Cardiovascular LLC - San Jose CA

International Classification:

A61B 18/04

US Classification:

606 29

Abstract:

A surgical apparatus for welding and severing tissue includes first and second elongated jaws, at least one of the jaws movable with respect to the other, and a first heating element and a second heating element, wherein the first heating element is adapted to weld tissue and the second heating element is adapted to sever tissue.

US Patent:

20120316550, Dec 13, 2012

Filed:

Jun 12, 2012

Appl. No.:

13/494985

Inventors:

Liming Lau - Mountain View CA, US
Arnold M. Escano - Santa Clara CA, US
Jerry Jarrard - San Jose CA, US
Samuel Ho - Foster City CA, US
Ryan C. Abbott - San Jose CA, US
Arthur M. Lin - Fremont CA, US
Jesse McQuiston - San Carlos CA, US
Kenny L. Dang - Laguna Niguel CA, US

International Classification:

A61B 18/08

US Classification:

606 29

Abstract:

A surgical apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series.

US Patent:

20220257223, Aug 18, 2022

Filed:

Aug 27, 2019

Appl. No.:

16/552963

Inventors:

- Wayne NJ, US
Peter L. CALLAS - Castro Valley CA, US
Michael C. STEWART - San Jose CA, US
Geoffrey H. WILLIS - Los Altos CA, US
Ryan C. ABBOTT - San Jose CA, US
Kimberly D. BARKMAN - Redwood City CA, US
Albert K. CHIN - Palo Alto CA, US
Kenny L. DANG - Laguna Niguel CA, US
Joseph N. LAMBERTI - Castro Valley CA, US
Arthur M. LIN - Fremont CA, US
Ravinder D. PAMNANI - Los Altos CA, US

Assignee:

MAQUET CARDIOVASCULAR LLC - Wayne NJ

International Classification:

A61B 17/00

Abstract:

Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end. The tool for manipulating vessels may have a low-profile for increased visibility of operation, and may be coupled to the cannula with a damping mechanism to reduce the possibility of avulsion of the vessels. Various vessel cutting and sealing devices are provided that may accommodate various sizes of vessels and improve cutting and sealing efficacy.

US Patent:

20210219835, Jul 22, 2021

Filed:

Apr 6, 2021

Appl. No.:

17/223995

Inventors:

- Wayne NJ, US
Peter L. CALLAS - Castro Valley CA, US
Michael C. STEWART - Sunnyvale CA, US
Geoffrey H. WILLIS - Los Altos CA, US
Ryan C. ABBOTT - San Jose CA, US
Charles J. ADAM - San Jose CA, US
Kimberly D. BARKMAN - Redwood City CA, US
Albert K. CHIN - Palo Alto CA, US
Kenny L. DANG - Laguna Niguel CA, US
Joseph N. LAMBERTI - Castro Valley CA, US
Arthur M. LIN - Fremont CA, US
Ravinder D. PAMNANI - Los Altos CA, US

Assignee:

MAQUET CARDIOVASCULAR LLC - Wayne NJ

International Classification:

A61B 1/313
A61B 1/00
A61B 1/018
A61B 17/00

Abstract:

Components for an endoscopic vessel harvesting system suitable for harvesting target vessels such as the saphenous vein or radial artery for cardiac artery bypass graft surgery. The main components of such systems include a vessel dissector and a vessel harvester, both of which work in conjunction with a separately provided endoscope. The vessel dissector is an elongated cannula having a blunt tip for separating layers of facial around vessels. The tip may be movable, and is typically transparent to permit viewing forward of the tip using the endoscope. Internal features of the tip may reduce glare back to the endoscope. Several devices improve visibility through the tip by reducing interference from tissue or fluid on the tip. The vessel harvester also has an elongated cannula for receiving the endoscope. Several tools within the harvester permit manipulation, severing, and sealing of vessels forward of the distal end. The tool for manipulating vessels may have a low-profile for increased visibility of operation, and may be coupled to the cannula with a damping mechanism to reduce the possibility of avulsion of the vessels. Various vessel cutting and sealing devices are provided that may accommodate various sizes of vessels and improve cutting and sealing efficacy.

US Patent:

20210220041, Jul 22, 2021

Filed:

Apr 5, 2021

Appl. No.:

17/222958

Inventors:

- Wayne NJ, US
Joseph N. LAMBERTI - Castro Valley CA, US
Rohit GIROTRA - San Francisco CA, US
Ryan ABBOTT - San Jose CA, US
Kenny L. DANG - Laguna Niguel CA, US
Justin WILLIAMS - Oakland CA, US

Assignee:

MAQUET CARDIOVASCULAR LLC - Wayne NJ

International Classification:

A61B 18/14
A61B 18/08

Abstract:

An actuator for use in a surgical instrument, the actuator includes an upper portion configured to be actuated by one or more fingers, wherein the upper portion has an upper distal portion for operating the surgical instrument in a first mode of operation, and an upper proximal portion for operating the surgical instrument in a second mode of operation, and wherein the upper distal portion and the upper proximal portion have different respective tactile configurations for informing the user of the first and second modes of operation, respectively.

US Patent:

20210205075, Jul 8, 2021

Filed:

Mar 24, 2021

Appl. No.:

17/210636

Inventors:

- Luxembourg, LU
Gopikrishnan SOUNDARARAJAN - Irvine CA, US
Kenny DANG - Santa Ana CA, US
Hussain RANGWALA - Santa Ana CA, US
Mark TORRIANNI - San Juan Capistrano CA, US
Eric RICHARDSON - Santa Ana CA, US
Kshitija GARDE - Santa Ana CA, US

International Classification:

A61F 2/24

Abstract:

A transcatheter valve prosthesis includes an expandable tubular stent, a prosthetic valve within the stent, and an anti-paravalvular leakage component coupled to and encircling the tubular stent. The anti-paravalvular leakage component includes a radially-compressible annular scaffold, which is a sinusoidal patterned ring of self-expanding material, and an impermeable membrane extending over the annular scaffold. The anti-paravalvular leakage component has an expanded configuration in which at least segments of the annular scaffold curve radially away from the tubular stent. Alternatively, the anti-paravalvular leakage component includes a plurality of self-expanding segments and an annular sealing element coupled to inner surfaces of the segments. The anti-paravalvular leakage component has an expanded configuration in which the segments curve radially away from the tubular stent and the annular sealing element is positioned between an outer surface of the tubular stent and inner surfaces of the segments.

US Patent:

20210137580, May 13, 2021

Filed:

Nov 3, 2020

Appl. No.:

17/088301

Inventors:

- Wayne NJ, US
Arnold M. ESCANO - Santa Clara CA, US
Jerry JARRARD - Firestone CO, US
Samuel HO - Foster City CA, US
Ryan C. ABBOTT - San Jose CA, US
Arthur M. LIN - Fremont CA, US
Jesse MCQUISTON - San Carlos CA, US
Kenny L. DANG - Laguna Niguel CA, US

Assignee:

MAQUET CARDIOVASCULAR LLC - Wayne NJ

International Classification:

A61B 18/08
A61B 17/29
A61B 18/14

Abstract:

A surgical apparatus and methods for severing and welding tissue, in particular blood vessels. The apparatus includes an elongated shaft having a pair of relatively movable jaws at a distal end thereof. A first heating element on one of the jaws is adapted to heat up to a first temperature and form a welded region within the tissue, while a second heating element on one of the jaws is adapted to heat up to a second temperature and sever the tissue within the welded region. The first and second heating elements may be provided on the same or opposite jaws. A control handle provided on the proximal end of the elongated shaft includes controls for opening and closing the jaws, and may include an actuator for sending current through the first and second heating elements. The first and second heating elements may be electrically connected in series, and the first heating element may be bifurcated such that it conducts about one half of the current as the second heating element. A force-limiting mechanism provided either within the control handle, in the elongated shaft, or at the jaws limits the pressure applied to the tissue by the jaws to ensure that the tissue is severed and the ends effectively welded within a short amount of time.

US Patent:

20180021081, Jan 25, 2018

Filed:

Jun 8, 2017

Appl. No.:

15/618112

Inventors:

- Mahwah NJ, US
Joseph N. LAMBERTI - Castro Valley CA, US
Rohit GIROTRA - San Francisco CA, US
Ryan ABBOTT - San Jose CA, US
Kenny L. DANG - Laguna Niguel CA, US
Justin WILLIAMS - San Jose CA, US

Assignee:

MAQUET CARDIOVASCULAR LLC - Mahwah NJ

International Classification:

A61B 18/14
A61B 18/08
A61B 18/00

Abstract:

An actuator for use in a surgical instrument, the actuator includes an upper portion configured to be actuated by one or more fingers, wherein the upper portion has an upper distal portion for operating the surgical instrument in a first mode of operation, and an upper proximal portion for operating the surgical instrument in a second mode of operation, and wherein the upper distal portion and the upper proximal portion have different respective tactile configurations for informing the user of the first and second modes of operation, respectively.