Darrell A Wagner

US Patent:

7302294, Nov 27, 2007

Filed:

Apr 2, 2004

Appl. No.:

10/817749

Inventors:

Apurv Kamath - Solana Beach CA, US
Paul Haefner - Circle Pines MN, US
Darrell Orvin Wagner - Isanti MN, US
Marina Brockway - Shoreview MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/365

US Classification:

607 6

Abstract:

Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection and energy delivery circuitry, and used to evaluate and treat cardiac rhythms using both the cardiac electrophysiologic and blood sensor signals. The blood sensor is configured for subcutaneous non-intrathoracic placement and provided in or on the housing, on a lead coupled to the housing, and/or separate to the housing and coupled to the processor via hardwire or wireless link. The blood sensor may be configured for optical sensing, using a blood oxygen saturation sensor or pulse oximeter. A cardiac rhythm may be evaluated using the electrocardiogram signal and the blood sensor signal, and tachyarrhythmias may be treated after confirmation using the blood sense signal.

US Patent:

7555335, Jun 30, 2009

Filed:

Apr 8, 2004

Appl. No.:

10/821206

Inventors:

Apurv Kamath - Solana Beach CA, US
Darrell Orvin Wagner - Isanti MN, US
Paul Haefner - Circle Pines MN, US
Marina Brockway - Shoreview MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61B 5/0428

US Classification:

600509

Abstract:

Cardiac methods and devices that separate signals using at least two composite signals acquired at least at two input impedances. A target source impedance may be selected, and a cardiac signal may be separated from composite signals using the selected target source impedance. Medical systems include a cardiac device having a housing that provides amplification circuitry configured to have a first amplifier input impedance and a second amplifier input impedance, such as using two separate circuits or switching between two input impedances. One or more electrode assemblies are coupled to the amplification circuitry. A signal processor is provided in the housing configured to separate a source signal using a first composite signal detected at the first input impedance and a second composite signal detected at the second input impedance. The phase response of the first input amplifier circuit is about equal to that of the second input amplifier circuit.

US Patent:

8024039, Sep 20, 2011

Filed:

Oct 17, 2007

Appl. No.:

11/975040

Inventors:

Apurv Kamath - Solana Beach CA, US
Paul Haefner - Circle Pines MN, US
Darrell Orvin Wagner - Isanti MN, US
Marina Brockway - Shoreview MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/39

US Classification:

607 6

Abstract:

Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection and energy delivery circuitry, and used to evaluate and treat cardiac rhythms using both the cardiac electrophysiologic and blood sensor signals. The blood sensor is configured for subcutaneous non-intrathoracic placement and provided in or on the housing, on a lead coupled to the housing, and/or separate to the housing and coupled to the processor via hardwire or wireless link. The blood sensor may be configured for optical sensing, using a blood oxygen saturation sensor or pulse oximeter. A cardiac rhythm may be evaluated using the electrocardiogram signal and the blood sensor signal, and tachyarrhythmias may be treated after confirmation using the blood sense signal.

US Patent:

20120071942, Mar 22, 2012

Filed:

Sep 20, 2011

Appl. No.:

13/237221

Inventors:

Apurv Kamath - Solana Beach CA, US
Paul Haefner - Circle Pines MN, US
Darrell Orvin Wagner - Isanti MN, US
Marina Brockway - Shoreview MN, US

International Classification:

A61N 1/365

US Classification:

607 14

Abstract:

Cardiac systems and methods using ECG and blood information for arrhythmia detection and discrimination. Detection circuitry is configured to produce an ECG. An implantable blood sensor configured to produce a blood sensor signal is coupled to a processor. The processor is coupled to the detection and energy delivery circuitry, and used to evaluate and treat cardiac rhythms using both the cardiac electrophysiologic and blood sensor signals. The blood sensor is configured for subcutaneous non-intrathoracic placement and provided in or on the housing, on a lead coupled to the housing, and/or separate to the housing and coupled to the processor via hardwire or wireless link. The blood sensor may be configured for optical sensing, using a blood oxygen saturation sensor or pulse oximeter. A cardiac rhythm may be evaluated using the electrocardiogram signal and the blood sensor signal, and tachyarrhythmias may be treated after confirmation using the blood sense signal.