Thomas C Lloyd

US Patent:

7610101, Oct 27, 2009

Filed:

Nov 30, 2006

Appl. No.:

11/565219

Inventors:

Steven R. Wedan - Savage MN, US
Thomas W. Lloyd - Spring Lake Park MN, US
Kevin J. Ely - Blaine MN, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/00

US Classification:

607116

Abstract:

A lead assembly for an implantable medical device. The lead assembly comprises a lead body having a first portion and a second portion. The first portion is adapted for coupling to a pulse generator and the second portion is adapted for implantation in or near a heart. First and second co-radial conductive coils are positioned within the lead body and electrically isolated from each other. The first and second conductive coils include a first and second number of coil turns and the first number is substantially equivalent to the second number. A ring electrode is located at the second portion and a tip electrode is located distal to the ring electrode and coupled to the second conductive coil. The first conductive coil extends past the ring electrode and transitions to a non-coiled region, which extends back to and couples to the ring electrode.

US Patent:

7986999, Jul 26, 2011

Filed:

Sep 14, 2009

Appl. No.:

12/559189

Inventors:

Steven R. Wedan - Savage MN, US
Thomas W. Lloyd - Spring Lake Park MN, US
Kevin J. Ely - Youngsville NC, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/00

US Classification:

607116

Abstract:

A lead assembly for an implantable medical device. The lead assembly comprises a lead body having a first portion and a second portion. The first portion is adapted for coupling to a pulse generator and the second portion is adapted for implantation in or near a heart. First and second co-radial conductive coils are positioned within the lead body and electrically isolated from each other. The first and second conductive coils include a first and second number of coil turns and the first number is substantially equivalent to the second number. A ring electrode is located at the second portion and a tip electrode is located distal to the ring electrode and coupled to the second conductive coil.

US Patent:

8170688, May 1, 2012

Filed:

Jun 7, 2011

Appl. No.:

13/155182

Inventors:

Steven R. Wedan - Savage MN, US
Thomas W. Lloyd - Spring Lake Park MN, US
Kevin J. Ely - Youngsville NC, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/00

US Classification:

607116

Abstract:

A lead assembly for an implantable medical device includes a lead body having a first portion adapted for coupling to a pulse generator and a second portion adapted for implantation. First and second co-radial conductive coils are electrically isolated from each other and include a first and second number of coil turns. The first and second number of coil turns include a number of matched turns and a number of unmatched turns, and the number of unmatched turns is less than approximately 2. 0% of the total number of unmatched and matched turns. First and second electrodes located at the second portion are respectively coupled to the first and second conductive coils. At least one capacitor element is connected in parallel with one or both of the first and second conductive coils and/or between the first and second conductive coils.

US Patent:

8401671, Mar 19, 2013

Filed:

Mar 21, 2012

Appl. No.:

13/425534

Inventors:

Steven R. Wedan - Savage MN, US
Thomas W. Lloyd - Spring Lake Park MN, US
Kevin J. Ely - Youngsville NC, US

Assignee:

Cardiac Pacemakers, Inc. - St. Paul MN

International Classification:

A61N 1/00

US Classification:

607116

Abstract:

A lead assembly for an implantable medical device includes a lead body having a first portion and a second portion. The first portion adapted for coupling to a pulse generator and the second portion is adapted for implantation. First and second conductive coils are positioned within the lead body and electrically isolated from each other. The first and second conductive coils each including a plurality of turns. Two or more adjacently wound consecutive turns of the first conductive coil alternate with two or more adjacently wound consecutive turns of the second conductive coil.

US Patent:

8588934, Nov 19, 2013

Filed:

Mar 4, 2010

Appl. No.:

12/743954

Inventors:

Thomas W. Lloyd - Eagan MN, US
Steven R. Wedan - Savage MN, US
Gregg S. Stenzel - Victoria MN, US

Assignee:

Imricor Medical Systems, Inc. - Burnsville MN

International Classification:

A61N 1/04

US Classification:

607116, 607117, 607118, 607119, 607 63, 607122

Abstract:

An MRI compatible electrode circuit construct is provided. The construct includes at least two filter components constructed from an electrode wire. One filter component may be a resonant LC filter at or near an electrode/wire interface that resolves the issue of insufficient attenuation by effectively blocking the RF induced current on the wire from exiting the wire through the electrode. The second filter component may include one or more non-resonant filter(s) positioned along the length of the electrode wire that resolve(s) the issue of excessive heating of the resonant LC filter by significantly attenuating the current induced on the wire before it reaches the resonant LC filter. The non-resonant filter(s) may also attenuate the RF current reflected from the resonant LC filter thereby resolving the issue of the strong reflected power from the resonant filter and the associated dielectric heating.

US Patent:

8588938, Nov 19, 2013

Filed:

Feb 10, 2012

Appl. No.:

13/371035

Inventors:

Thomas W. Lloyd - Eagan MN, US
Steven R. Wedan - Savage MN, US
Gregg S. Stenzel - Victoria MN, US

Assignee:

Imricor Medical Systems, Inc. - Burnsville MN

International Classification:

A61N 1/05

US Classification:

607116, 607117

Abstract:

An MRI compatible electrode circuit construct is provided. The construct includes at least two filter components constructed from an electrode wire. One filter component may be a resonant LC filter at or near an electrode/wire interface that resolves the issue of insufficient attenuation by effectively blocking the RF induced current on the wire from exiting the wire through the electrode. The second filter component may include one or more non-resonant filter(s) positioned along the length of the electrode wire that resolve(s) the issue of excessive heating of the resonant LC filter by significantly attenuating the current induced on the wire before it reaches the resonant LC filter. The non-resonant filter(s) may also attenuate the RF current reflected from the resonant LC filter thereby resolving the issue of the strong reflected power from the resonant filter and the associated dielectric heating.

US Patent:

20080221638, Sep 11, 2008

Filed:

Mar 9, 2007

Appl. No.:

11/684419

Inventors:

Steve R. Wedan - Savage MN, US
Jean M. Bobgan - Maple Grove MN, US
Thomas W. Lloyd - Spring Lake Park MN, US

Assignee:

CARDIAC PACEMAKERS, INC. - St. Paul MN

International Classification:

A61N 1/08

US Classification:

607 34

Abstract:

An implantable medical device configured to be compatible with the environment inside an MRI machine. The implantable medical device includes a housing constructed of an electrically conductive material and pulse generation circuitry within the housing for generating electrical voltage pulses. The implantable medical device further includes a first conductor that is configured to transmit the electrical voltage pulses from the pulse generation circuitry to a patient's cardiac tissue and a second conductor that is configured to provide an electrically conductive path from the patient's cardiac tissue back to the pulse generation circuitry. The implantable medical device further includes a selectively interruptible electrically conductive path connecting the pulse generation circuitry with the housing.

US Patent:

20110306872, Dec 15, 2011

Filed:

Mar 4, 2010

Appl. No.:

13/202705

Inventors:

Steven R. Wedan - Savage MN, US
Thomas W. Lloyd - Eagan MN, US
Gregg S. Stenzel - Victoria MN, US

Assignee:

IMRICOR Medical Systems, Inc. - Burnsvile MN

International Classification:

A61B 5/055

US Classification:

600422

Abstract:

A composite tracking system for a medical device comprises a field location tracking system including at least one field location sensor structured to be coupled to a medical device, a magnetic resonance tracking system including at least one tracking coil structured to be coupled to a medical device, and a composite tracking processor operably coupled to the field location tracking system and the magnetic resonance tracking system. The composite tracking processor is operable to receive and process field location parameters from the field location tracking system and positional coordinates from the magnetic resonance tracking system to register a field location coordinate system to a magnetic resonance coordinate system.

Address:

3756 Denmark Trl E, Saint Paul, MN 55123

VIN:

1UJAJ01G071BD0389

Make:

Plymouth

Model:

Voyager 3dr SE 113 WB

Year:

2007