Ronald R Berger

US Patent:

6390996, May 21, 2002

Filed:

Nov 9, 1998

Appl. No.:

09/188211

Inventors:

Henry R. Halperin - Baltimore MD
Ronald D. Berger - Baltimore MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

A61M 3100

US Classification:

601 41, 73510

Abstract:

Chest compressions are measured and prompted to facilitate the effective administration of CPR. A displacement detector produces a displacement indicative signal indicative of the displacement of the CPR recipients chest toward the recipients spine. A signaling mechanism provides chest compression indication signals directing a chest compression force being applied to the chest and a frequency of such compressions. An automated controller and an automated constricting device may be provided for applying CPR to the recipient in an automated fashion. The automated controller receives the chest compression indication signals from the signaling mechanism, and, in accordance with the chest compression indication signals, controls the force and frequency of constrictions. The system may be provided with a tilt compensator comprising a tilt sensor mechanism outputting a tilt compensation signal indicative of the extent of tilt of the device, and may be further provided with an adjuster for adjusting the distance value in accordance with the tilt compensation signal. An ECG signal processor may be provided which removes the CPR-induced artifact from a measured ECG signal obtained during the administration of CPR.

US Patent:

6633780, Oct 14, 2003

Filed:

Jun 5, 2000

Appl. No.:

09/586787

Inventors:

Ronald D. Berger - Baltimore MD

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

A61N 105

US Classification:

607129, 607 5, 607148, 607119

Abstract:

An implantable cardioverter defibrillator (ICD) system includes an internal electrode placed in the right ventricle of the heart, and a flexible array (that includes a plurality of electrodes) placed over a significant portion of the heart. Defibrillation shocks are applied between the internal electrode in the ventricle and the electrodes in the flexible array. Because the electrodes in the flexible array surround a significant portion of the heart, the array functions as a quasi-Faraday cage and is thus capable of confining a significant portion of the defibrillation shock field to the heart itself. As a result, defibrillation shocks are less likely to activate extracardiac muscle(s) and/or nerve tissue(s) within the surrounding chest. Application of the shocks is thus less painful to the patient.

US Patent:

6701176, Mar 2, 2004

Filed:

Oct 29, 1999

Appl. No.:

09/428990

Inventors:

Henry R. Halperin - Baltimore MD
Ronald D. Berger - Baltimore MD
Ergin Atalar - Columbia MD
Elliot R. McVeigh - Potomac MD
Albert Lardo - Baldwin MD
Hugh Calkins - Balt MD
Joao Lima - Timonium MD

Assignee:

Johns Hopkins University School of Medicine - Baltimore MD

International Classification:

A61B 5055

US Classification:

600411, 600422, 324307

Abstract:

A system and method for using magnetic resonance imaging to increase the accuracy of electrophysiologic procedures is disclosed. The system in its preferred embodiment provides an invasive combined electrophysiology and imaging antenna catheter which includes an RF antenna for receiving magnetic resonance signals and diagnostic electrodes for receiving electrical potentials. The combined electrophysiology and imaging antenna catheter is used in combination with a magnetic resonance imaging scanner to guide and provide visualization during electrophysiologic diagnostic or therapeutic procedures. The invention is particularly applicable to catheter ablation, e. g. , ablation of atrial fibrillation. In embodiments which are useful for catheter ablation, the combined electrophysiology and imaging antenna catheter may further include an ablation tip, and such embodiment may be used as an intracardiac device to both deliver energy to selected areas of tissue and visualize the resulting ablation lesions, thereby greatly simplifying production of continuous linear lesions. The invention further includes embodiments useful for guiding electrophysiologic diagnostic and therapeutic procedures other than ablation.

US Patent:

6827695, Dec 7, 2004

Filed:

Oct 25, 2002

Appl. No.:

10/280220

Inventors:

James Adam Palazzolo - Sunnyvale CA
Ronald D. Berger - Baltimore MD
Henry R. Halperin - Baltimore MD
Darren R. Sherman - Sunnyvale CA

Assignee:

Revivant Corporation - Sunnyvale CA

International Classification:

A61K 3100

US Classification:

601 41, 128901, 600509

Abstract:

A method of processing a raw acceleration signal, measured by an accelerometer-based compression monitor, to produce an accurate and precise estimated actual depth of chest compressions. The raw acceleration signal is filtered during integration and then a moving average of past starting points estimates the actual current starting point. An estimated actual peak of the compression is then determined in a similar fashion. The estimated actual starting point is subtracted from the estimated actual peak to calculate the estimated actual depth of chest compressions. In addition, one or more reference sensors (such as an ECG noise sensor) may be used to help establish the starting points of compressions. The reference sensors may be used, either alone or in combination with other signal processing techniques, to enhance the accuracy and precision of the estimated actual depth of compressions.

US Patent:

6865413, Mar 8, 2005

Filed:

Jan 23, 2002

Appl. No.:

10/057540

Inventors:

Henry R. Halperin - Baltimore MD, US
Ronald D. Berger - Baltimore MD, US

Assignee:

Revivant Corporation - Sunnyvale CA

International Classification:

A61B005/04

US Classification:

600509

Abstract:

Chest compressions are measured and prompted to facilitate the effective administration of CPR. A displacement detector determines a displacement indicative signal indicative of the displacement of the CPR recipient's chest toward the recipient's spine. A signaling mechanism provides chest compression indication signals directing a chest compression force being applied to the chest and a frequency of such compressions. An automated controller and an automated constricting device may be provided for applying CPR to the recipient in an automated fashion. The automated controller receives the chest compression indication signals from the signaling mechanism, and, in accordance with the chest compression indication signals, controls the force and frequency of constrictions. The system may be provided with a tilt compensator comprising a tilt sensor mechanism outputting a tilt compensation signal indicative of the extent of tilt of the device, and may be further provided with an adjuster for adjusting the distance value in accordance with the tilt compensation signal. An ECG signal processor may be provided which removes the CPR-induced artifact from a measured ECG signal obtained during the administration of CPR.

US Patent:

7069070, Jun 27, 2006

Filed:

May 12, 2003

Appl. No.:

10/436876

Inventors:

Gerrard M. Carlson - Champlin MN, US
Ronald D. Berger - Baltimore MD, US

Assignee:

Cardiac Pacemakers, Inc. - Saint Paul MN

International Classification:

A61B 5/0452

US Classification:

600519, 600513, 600509

Abstract:

A computationally efficient method for assessing a subject's autonomic balance by measurement of heart rate variability is disclosed which is particularly suitable for implementation by an implantable medical device. Statistical surrogates are used to represent frequency components of an RR time series. A ratio of the low frequency component to the high frequency component may then be estimated to assess the subject's autonomic balance.

US Patent:

7074199, Jul 11, 2006

Filed:

Sep 12, 2001

Appl. No.:

09/952866

Inventors:

Henry R. Halperin - Baltimore MD, US
Ronald D. Berger - Baltimore MD, US

Assignee:

Revivant Corporation - Sunnyvale CA

International Classification:

A61H 31/00

US Classification:

601 41

Abstract:

Chest compressions are measured and prompted to facilitate the effective administration of CPR. A displacement detector produces a displacement indicative signal indicative of the displacement of the CPR recipient's chest toward the recipient's spine. A signaling mechanism provides chest compression indication signals directing a chest compression force being applied to the chest and a frequency of such compressions. An automated controller and an automated constricting device may be provided for applying CPR to the recipient in an automated fashion. The automated controller receives the chest compression indication signals from the signaling mechanism, and, in accordance with the chest compression indication signals, controls the force and frequency of constrictions. The system may be provided with a tilt compensator comprising a tilt sensor mechanism outputting a tilt compensation signal indicative of the extent of tilt of the device, and may be further provided with an adjuster for adjusting the distance value in accordance with the tilt compensation signal. An ECG signal processor may be provided which removes the CPR-induced artifact from a measured ECG signal obtained during the administration of CPR.

US Patent:

7108665, Sep 19, 2006

Filed:

Mar 22, 2002

Appl. No.:

10/104674

Inventors:

Henry R. Halperin - Baltimore MD, US
Ronald D. Berger - Baltimore MD, US

Assignee:

Zoll Circulation, Inc. - Sunnyvale CA

International Classification:

A61H 31/00

US Classification:

601 41

Abstract:

Chest compressions are measured and prompted to facilitate the effective administration of CPR. A displacement detector produces a displacement indicative signal indicative of the displacement of the CPR recipient's chest toward the recipient's spine. A signaling mechanism provides chest compression indication signals directing a chest compression force being applied to the chest and a frequency of such compressions. An automated controller and an automated constricting device may be provided for applying CPR to the recipient in an automated fashion. The automated controller receives the chest compression indication signals from the signaling mechanism, and, in accordance with the chest compression indication signals, controls the force and frequency of constrictions. The system may be provided with a tilt compensator comprising a tilt sensor mechanism outputting a tilt compensation signal indicative of the extent of tilt of the device, and may be further provided with an adjuster for adjusting the distance value in accordance with the tilt compensation signal. An ECG signal processor may be provided which removes the CPR-induced artifact from a measured ECG signal_obtained during the administration of CPR.