KENNETH RALPH FOSTER
Engineering in Haverford, PA

License number
Pennsylvania ET021252
Category
Engineers
Type
Engineer in Training
Address
Address
Haverford, PA 19041
LicenseFiles verified this license of Apr 25, 2017 at the Pennsylvania Licensing System.

Professional information

Kenneth Foster Photo 1

Systems And Methods For Examining The Electrical Characteristic Of Cardiac Tissue

US Patent:
6370435, Apr 9, 2002
Filed:
Feb 14, 2001
Appl. No.:
09/783778
Inventors:
Dorin Panescu - Sunnyvale CA
David K. Swanson - Mountain View CA
Mark S. Mirotznik - Silver Spring MD
David S. Schwartzman - Philadelphia PA
Kenneth R. Foster - Haverford PA
Assignee:
EP Technologies, Inc. - San Jose CA
International Classification:
A61B 504
US Classification:
607122, 607101, 606 41, 600374, 600547
Abstract:
Systems and methods examine heart tissue morphology using three or more spaced apart electrodes, at least two of which are located within the heart in contact with endocardial tissue. The systems and methods transmit electrical current through a region of heart tissue lying between selected pairs of the electrodes, at least one of the electrodes in each pair being located within the heart. The systems and methods derive the electrical characteristic of tissue lying between the electrode pairs based, at least in part, upon sensing tissue impedances. The systems and methods make possible the use of multiple endocardial electrodes for taking multiple measurements of the electrical characteristics of heart tissue. Multiplexing can be used to facilitate data processing. The systems and methods also make possible the identification of regions of low relative electrical characteristics, indicative of infarcted tissue, without invasive surgical techniques.

Kenneth Foster Photo 2

Systems And Methods For Examining The Electrical Characteristic Of Cardiac Tissue

US Patent:
6597955, Jul 22, 2003
Filed:
Jan 4, 2002
Appl. No.:
10/039211
Inventors:
Dorin Panescu - Sunnyvale CA
David K. Swanson - Mountain View CA
Mark S. Mirotznik - Silver Spring MD
David S. Schwartzman - Philadelphia PA
Kenneth R. Foster - Haverford PA
Assignee:
EP Technologies, Inc. - San Jose CA
International Classification:
A61N 100
US Classification:
607122, 607116, 607101, 606 41
Abstract:
Systems and methods examine heart tissue morphology using three or more spaced apart electrodes, at least two of which are located within the heart in contact with endocardial tissue. The systems and methods transmit electrical current through a region of heart tissue lying between selected pairs of the electrodes, at least one of the electrodes in each pair being located within the heart. The systems and methods derive the electrical characteristic of tissue lying between the electrode pairs based, at least in part, upon sensing tissue impedances. The systems and methods make possible the use of multiple endocardial electrodes for taking multiple measurements of the electrical characteristics of heart tissue. Multiplexing can be used to facilitate data processing. The systems and methods also make possible the identification of regions of low relative electrical characteristics, indicative of infarcted tissue, without invasive surgical techniques.

Kenneth Foster Photo 3

Method Of Using Endocardial Impedance For Determining Electrode-Tissue Contact, Appropriate Sites For Arrhythmia Ablation And Tissue Heating During Ablation

US Patent:
5447529, Sep 5, 1995
Filed:
Jan 28, 1994
Appl. No.:
8/188514
Inventors:
Francis E. Marchlinski - Bala Cynwyd PA
David S. Schwartzman - Philadelphia PA
Mark S. Mirotznik - Silver Spring MD
Kenneth R. Foster - Haverford PA
Charles D. Gottleb - Wynnewood PA
Isaac Chang - Philadelphia PA
Assignee:
Philadelphia Heart Institute - Philadelphia PA
The Trustees of the University of Pennsylvania - Philadelphia PA
Catholic University of America - Washington DC
International Classification:
A61B 1739, A61N 105
US Classification:
607 99
Abstract:
A method of locating infarcted myocardial tissue in a beating heart includes the step of inserting an impedance measuring tip of a catheter into the chamber of the beating heart, particularly the left or right ventricle, and measuring the impedance of the endocardium at various locations within the chamber of the beating heart. The values measured are compared to impedance values with a predetermined range of values to identify an infarcted area of myocardium and distinguish such area from normal myocardium. The measurements are also compared to a range of values for an infarction border zone. In accordance with the invention, the infarction border zone may be located. The infarction border zone is a significant source of arrhythmia, and particularly of ventricular tachycardia. Further, in accordance with the methods of the present invention, the risk of arrhythmia in a beating heart may be substantially reduced or eliminated by ablating endocardium within the infarction border zone utilizing the same catheter tip. Impedance measurements may also be utilized to assess the adequacy of the electrode-tissue contact, particularly in a fluid filled body organ or cavity.

Kenneth Foster Photo 4

Method Of Using Endocardial Impedance For Assessing Tissue Heating During Ablation

US Patent:
5562721, Oct 8, 1996
Filed:
May 10, 1995
Appl. No.:
8/438326
Inventors:
Francis E. Marchlinski - Bala Cynwyd PA
David S Schwartzman - Philadelphia PA
Mark S. Mirotznik - Silver Spring MD
Kenneth R. Foster - Haverford PA
Charles D. Gottlieb - Wynnewood PA
Isaac Chang - Philadelphia PA
Assignee:
University of Pennsylvania - Philadelphia PA
Philadelphia Heart Institute - Philadelphia PA
Catholic University of America - Washington DC
International Classification:
A61B 1739, A61N 105
US Classification:
607 99
Abstract:
A method of locating infarcted myocardial tissue in a beating heart includes the step of inserting an impedance measuring tip of a catheter into the chamber of the beating heart, particularly the left or right ventricle, and measuring the impedance of the endocardium at various locations within the chamber of the beating heart. The values measured are compared to impedance values with a predetermined range of values to identify an infarcted area of myocardium and distinguish such area from normal myocardium. The measurements are also compared to a range of values for an infarction border zone. In accordance with the invention, the infarction border zone may be located. The infarction border zone is a significant source of arrhythmia, and particularly of ventricular tachycardia. Further, in accordance with the methods of the present invention, the risk of arrhythmia in a beating heart may be substantially reduced or eliminated by ablating endocardium within the infarction border zone utilizing the same catheter tip. Impedance measurements may also be utilized to assess the adequacy of the electrode-tissue contact, particularly in a fluid filled body organ or cavity.

Kenneth Foster Photo 5

Systems And Methods For Examining The Electrical Characteristic Of Cardiac Tissue

US Patent:
6256540, Jul 3, 2001
Filed:
Jul 7, 1997
Appl. No.:
8/888456
Inventors:
Dorin Panescu - Sunnyvale CA
David K. Swanson - Mountain View CA
Mark S. Mirotznik - Silver Spring MD
David S. Schwartzman - Philadelphia PA
Kenneth R. Foster - Haverford PA
Assignee:
EP Technologies - San Jose CA
International Classification:
A61B 504
US Classification:
607122
Abstract:
Systems and methods examine heart tissue morphology using three or more spaced apart electrodes, at least two of which are located within the heart in contact with endocardial tissue. The systems and methods transmit electrical current through a region of heart tissue lying between selected pairs of the electrodes, at least one of the electrodes in each pair being located within the heart. The systems and methods derive the electrical characteristic of tissue lying between the electrode pairs based, at least in part, upon sensing tissue impedances. The systems and methods make possible the use of multiple endocardial electrodes for taking multiple measurements of the electrical characteristics of heart tissue. Multiplexing can be used to facilitate data processing. The systems and methods also make possible the identification of regions of low relative electrical characteristics, indicative of infarcted tissue, without invasive surgical techniques.

Kenneth Foster Photo 6

Method Of Using Endocardial Impedance For Determining Electrode-Tissue Contact

US Patent:
5673704, Oct 7, 1997
Filed:
May 28, 1996
Appl. No.:
8/654197
Inventors:
Francis E. Marchlinski - Bala Cynwyd PA
David S. Schwartzman - Philadelphia PA
Mark S. Mirotznik - Silver Spring MD
Kenneth R. Foster - Haverford PA
Charles D. Gottlieb - Wynnewood PA
Isaac Chang - Philadelphia PA
International Classification:
A61B 1739, A61N 105
US Classification:
128739
Abstract:
A method of locating infarcted myocardial tissue in a beating heart includes the step of inserting an impedance measuring tip of a catheter into the chamber of the beating heart, particularly the left or right ventricle, and measuring the impedance of the endocardium at various locations within the chamber of the beating heart. The values measured are compared to impedance values with a predetermined range of values to identify an infarcted area of myocardium and distinguish such area from normal myocardium. The measurements are also compared to a range of values for an infarction border zone. In accordance with the invention, the infarction border zone may be located. The infarction border zone is a significant source of arrhythmia, and particularly of ventricular tachycardia. Further, in accordance with the methods of the present invention, the risk of arrhythmia in a beating heart may be substantially reduced or eliminated by ablating endocardium within the infarction border zone utilizing the same catheter tip. Impedance measurements may also be utilized to assess the adequacy of the electrode-tissue contact, particularly in a fluid filled body organ or cavity.

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