Paul J Wang

US Patent:

7041095, May 9, 2006

Filed:

Oct 28, 2003

Appl. No.:

10/695110

Inventors:

Paul J. Wang - Saratoga CA, US
Hassan Rastegar - Newton MA, US

Assignee:

New England Medical Center - Boston MA

International Classification:

A61B 18/04

US Classification:

606 32, 606 41, 606 51, 607 99

Abstract:

A medical device, and related method, use epicardial ablators and detectors for intraoperative epicardial approaches to ablation therapy of cardiac conduction pathways. An epicardial gripper is sized to grasp the cardiac circumference or smaller structures on the epicardial surface of the heart. Ablators are disposed on the arms of the gripper for epicardial ablation of cardiac conduction tissue. In another embodiment of the invention, an electrode system includes a flexible, adjustable probe forming a loop for epicardial ablation. Ablators are provided on one or multiple surfaces of the probe for epicardial ablation of cardiac conduction tissue. In yet another embodiment of the invention, an endocardial ablator detection system provides an indicator adjacent an ablator on an endocardial catheter, and a detector on an epicardial probe. The epicardial probe detects signals transmitted by the indicator on the endocardial catheter to localize the position of the endocardial ablator relative to the epicardial surface. The surgeon uses this information for guidance in adjusting the position of the endocardial ablator according to therapeutic objectives of cardiac ablation.

US Patent:

8100900, Jan 24, 2012

Filed:

May 12, 2008

Appl. No.:

12/119442

Inventors:

Friedrich B. Prinz - Woodside CA, US
Paul J. Wang - Saratoga CA, US
Bryant Y Lin - Menlo Park CA, US
Ross Venook - Burlingame CA, US

Assignee:

Board of Trustees of the Leland Stanford Junior University - Palo Alto CA

International Classification:

A61B 18/14
A61B 18/02

US Classification:

606 41, 606 20

Abstract:

The system of the preferred embodiments includes a first rotational element, a second rotational element, and a therapeutic source coupled to the rotational elements. The system permits simultaneous attachment to and movement around a surface of tissue, preferably during an ablation procedure (either during lesion creation or between lesion creation events), or during any other suitable procedure. The therapeutic source functions to translate along the path of tissue and deliver therapy as the first and second rotational elements rotate and roll along the path of tissue. The therapeutic source preferably delivers contiguous doses of therapy along the path of tissue. The system is preferably designed for delivering therapy to tissue and, more specifically, for delivering therapy to cardiac tissue. The system, however, may be alternatively used in any suitable environment and for any suitable reason.

US Patent:

8204581, Jun 19, 2012

Filed:

Dec 22, 2008

Appl. No.:

12/340772

Inventors:

Baharan Kamousi - Sunnyvale CA, US
Bryant Lin - Menlo Park CA, US
Paul J Wang - Saratoga CA, US

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Palo Alto CA

International Classification:

A61B 5/02
A61N 1/00

US Classification:

600518, 600515, 607 5

Abstract:

Techniques for discrimination of heart rhythms in cardiac rhythm management devices include determining a current covariance matrix of multiple electrograms measuring each current heart beat, determining a distance measure between the current covariance matrix and a predetermined covariance matrix of the multiple electrograms measuring at least one different heart beat; and determining whether the heart beat represents ventricular tachycardia based on the distance measure.

US Patent:

8494623, Jul 23, 2013

Filed:

Jun 9, 2009

Appl. No.:

12/481422

Inventors:

Dorothea Koh - Novena, SG
Bryant Lin - Menlo Park CA, US
Paul J. Wang - Saratoga CA, US
Amin Al-Ahmad - Cupertino CA, US

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Palo Alto CA

International Classification:

A61B 5/0452

US Classification:

600515

Abstract:

A method is provided that includes providing a monitoring apparatus including one or more modules within a target cavity or lumen of a body. The one or more modules are provided within the target cavity or lumen in a first state in which the monitoring apparatus is configured to remain within the target cavity or lumen. The method further includes monitoring physiological conditions of the body using one or more sensors within the one or more modules, and providing the one or more modules in a second state in which the monitoring apparatus is configured to exit the target cavity or lumen.

US Patent:

20020093527, Jul 18, 2002

Filed:

Apr 5, 2001

Appl. No.:

09/826602

Inventors:

Kieran Sherlock - Palo Alto CA, US
Geoffrey Cooper - Palo Alto CA, US
Luis Valente - Palo Alto CA, US
Jose Amador - San Jose CA, US
Paul Wang - San Jose CA, US
Robert Shaw - Los Altos CA, US
Kevin Cornwall - Poway CA, US

International Classification:

G09G005/00

US Classification:

345/736000

Abstract:

A user interface for a network security policy monitoring system and method that performs network and security assessments based on system-wide policy, whereby real network traffic is analyzed to identify abnormalities, vulnerabilities, and incorrect configurations by listening on a network, logging events, and taking action.

US Patent:

20070276342, Nov 29, 2007

Filed:

Mar 28, 2007

Appl. No.:

11/729118

Inventors:

Bryant Lin - Palo Alto CA, US
Paul Wang - Saratoga CA, US
Joseph Knight - Palm Harbor FL, US
Stewart McCallum - Villanova PA, US
Bertha Chen - Menlo Park PA, US
Tatum Tarin - Redwood CA, US

International Classification:

A61M 27/00

US Classification:

604264000

Abstract:

A device completely disposable within a bodily lumen of a patient and for controlling flow through the bodily lumen having a device body having a proximal end, a distal end and a device lumen within the device body extending from the proximal end to the distal end and a fixation element extending from the outer wall of device body adapted and configured to engage with the wall of the bodily lumen. The device body is adapted and configured to move from a position where the device lumen blocks flow through the bodily lumen to a position where the device lumen allows flow through the bodily lumen. In other configurations, there are one or more valves within the device lumen adapted and configured to move between a position to block flow through the bodily lumen and a position to allow flow through the bodily lumen. There is also a method for implanting a device within a body lumen by placing a device having a device body and fixation elements extending from the device body on a catheter and then dilating the body lumen such that the device body and the fixation elements may advance through the dilated body lumen without the fixation elements engaging the wall of the body lumen. Next, advancing the device to an implant site within the body lumen and then engaging the walls of the body lumen with the fixation elements.

US Patent:

20130131665, May 23, 2013

Filed:

Nov 30, 2010

Appl. No.:

13/512493

Inventors:

Paul J. Wang - Saratoga CA, US
Amin Al-Ahmad - Cupertino CA, US
William Francis Johnston - Sunnyvale CA, US
Kai Ihnken - Arlington VA, US
Kaartiga Sivanesan - Winter Springs FL, US
Morgan Clyburn - Menlo Park CA, US
Kathleen Lee Kang - Sunnyvale CA, US
Lauren Shui Sum Chan - San Francisco CA, US
Robert C. Robbins - Stanford CA, US
Friedrich B. Prinz - Woodside CA, US

International Classification:

A61B 18/14

US Classification:

606 41

Abstract:

A transmural ablation device is provided to achieve endocardial and epicardial ablation at the same site but directed from the inner and outer surfaces of the heart to create a transmural lesion. By ablating from both sides of the heart tissue, it is possible to increase the depth of the lesion created and to increase the likelihood of a transmural lesion. Embodiments pertain to techniques to align the endocardial and epicardial ablation elements and techniques to position and move the endocardial and epicardial ablation elements along a predefined linear, curvilinear, or circular path. The ability to bring the epicardial and endocardial elements more closely or firmly with the underlying tissue is important in creating optimal lesions. Magnetic force attracts the epicardial and endocardial elements.

US Patent:

61135844, Sep 5, 2000

Filed:

Jun 17, 1999

Appl. No.:

9/335388

Inventors:

Tracey A. Morley - Sunnyvale CA
Paul J. Wang - Chestnut Hill MA

Assignee:

Cardima, Inc. - Fremont CA

International Classification:

A61M 2500

US Classification:

604500

Abstract:

A method and system for lysing a patient's heart tissue causing or involved with arrhythmia which includes an intravascular catheter with a relatively inelastic occlusion balloon on the distal end of the catheter which is inflated to block an artery or vein of the patient's heart so than when lysing fluid such as an ethanol solution is discharged from the distal port in the catheter the inflated balloon prevents the proximal refluxing of lysing medium into undesirable areas of the patient's heart. The inelastic balloon is configured to be inflated to a diameter of about 0. 7 to about 1. 3, preferably about 0. 8 to about 1. 2, times the diameter of the blood vessel in which the balloon is to be inflated so as to effectively occlude the passageway without damaging the wall of the blood vessel. The working length of the balloon is less than about 1. 5 cm, preferably less than 0. 75 cm.