Randall L Nelson

US Patent:

7063691, Jun 20, 2006

Filed:

Mar 16, 2004

Appl. No.:

10/801299

Inventors:

Randall S. Nelson - Pine Springs MN, US
Charles L. Truwit - Wayzata MN, US

Assignee:

Regents of the University of Minnesota - Minneapolis MN

International Classification:

A61M 9/22

US Classification:

6045911, 604502, 60428801

Abstract:

There is disclosed method and apparatus for retaining a reservoir for a therapeutic agent between the scalp and cranium of a subject, including providing a deformable pouch or rigid cylinder for dispensing the therapeutic agent from the reservoir to a location in the body of the subject. In one embodiment, a pump is used to pump the agent from the reservoir to the location in the subject's body. In another example embodiment, there is provided method and apparatus for forming at least one cavity in the cranium of the subject, and placing at least a portion of the pump in the cavity. Power is applied to the pump in a variety of ways.

US Patent:

20060253106, Nov 9, 2006

Filed:

May 9, 2006

Appl. No.:

11/430530

Inventors:

Randall Nelson - Pine Springs MN, US
Charles Truwit - Wayzata MN, US

International Classification:

A61K 9/22

US Classification:

604891100

Abstract:

There is disclosed method and apparatus for retaining a reservoir for a therapeutic agent between the scalp and cranium of a subject, including providing a deformable pouch or rigid cylinder for dispensing the therapeutic agent from the reservoir to a location in the body of the subject. In one embodiment, a pump is used to pump the agent from the reservoir to the location in the subject's body. In another example embodiment, there is provided method and apparatus for forming at least one cavity in the cranium of the subject, and placing at least a portion of the pump in the cavity. Power is applied to the pump in a variety of ways.

US Patent:

57499101, May 12, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/486759

Inventors:

Dennis A. Brumwell - Bloomington MN
Joseph S. Perttu - Chanhassen MN
Mark W. Kroll - Minnetonka MN
Randall S. Nelson - Pine Springs MN

Assignee:

Angeion Corporation - Plymouth MN

International Classification:

A61N 1375

US Classification:

607 36

Abstract:

An implantable cardioverter defibrillator capable of subcutaneous positioning within a patient delivers at least one electrical cardioversion/defibrillation countershocks to the heart of the patient. The implantable cardioverter defibrillator includes a housing, circuitry positioned within the housing to control delivery of the countershocks, and an energy source coupled with the circuitry to provide electrical energy to a capacitor in the circuitry that stores the electrical energy for delivery of the countershocks. Because the circuitry is susceptible to undesirable electromagnetic coupling effects of origin external to the circuitry, particularly the capacitive coupling effects between the circuitry and the housing of the device when at least a portion of the housing is utilized as an electrode, the implantable cardioverter defibrillator also includes a conductive shield, disposed between the housing and the circuitry, to shield the circuitry against such undesired coupling effects.

US Patent:

60677767, May 30, 2000

Filed:

Apr 29, 1998

Appl. No.:

9/069504

Inventors:

Glenn C. Heuer - Forest Lake MN
Norris R. Brand - Forest Lake MN
Randall D. Nelson - East Bethel MN
Wolfgang Weber - Luneburg, DE

Assignee:

H. B. Fuller Licensing & Financing, Inc. - St. Paul MN

International Classification:

B65B 6308

US Classification:

53440

Abstract:

The present invention is directed to a method of packaging thermoplastic compositions. Preferably, the steps of the method may be employed in a continuous process. The method is especially suited for thermoplastic compositions such as pressure sensitive hot melt adhesives. The pressure sensitive thermoplastic composition may be packaged in an inclusion meltable film material wherein the film can be melted and blended with the hot melt adhesive during use, or alternatively, the composition may be contained in a drum. Alternatively the thermoplastic composition may be coated with a pelletizing aid.

US Patent:

59192135, Jul 6, 1999

Filed:

Sep 16, 1996

Appl. No.:

8/716686

Inventors:

Randall S. Nelson - Pine Springs MN
Malcolm Drysdale - Princess Risborough Buckinghamshire HP279BQ, GB

International Classification:

A61N 139

US Classification:

607 8

Abstract:

An intraoperative defibrillation test system for establishing defibrillation thresholds for an implantable cardioverter defibrillator (ICD) uses the actual ICD housing electrode, rather than a test housing electrode, as part of the test system. The intraoperative defibrillation test system includes the ICD, an external test station, and a test cable interconnecting the ICD with the test station. In one embodiment, the test cable is only connected to the ICD housing electrode and other test cables are used to connect to other implanted electrodes. In another embodiment, the test cable includes multiple conductors for connecting to all of the electrodes associated with the ICD, including the ICD housing electrode. In a further embodiment, the test cable includes a distal connector block that serves as a three-way T-between at least one port in a header of the ICD and an electrode lead.

US Patent:

55317669, Jul 2, 1996

Filed:

Jan 23, 1995

Appl. No.:

8/376806

Inventors:

Mark W. Kroll - Minnetonka MN
Randall S. Nelson - Pine Springs MN
Theodore P. Adams - Edina MN

Assignee:

Angeion Corporation - Plymouth MN

International Classification:

A61N 139

US Classification:

607 5

Abstract:

An electrode system for an implantable cardioverter defibrillator. The electrode system includes a conductive structure which is physically and electrically connected to the housing or can of the implantable cardioverter defibrillator and is used as an electrode in combination with an existing implantable cardioverter defibrillator electrode or electrodes. The electrode system provides a therapeutically significant increase in the effective surface area of the implantable cardioverter defibrillator's electrodes without requiring an additional header connection, feedthru, or cable.

US Patent:

56499744, Jul 22, 1997

Filed:

Aug 28, 1995

Appl. No.:

8/520533

Inventors:

Randall S. Nelson - Pine Springs MN
Mark W. Kroll - Minnetonka MN

Assignee:

Angeion Corporation - Plymouth MN

International Classification:

A61N 105

US Classification:

607122

Abstract:

A low profile defibrillation catheter is disclosed which is much thinner than existing devices. The thin structure is provided by using the current conductor coil as a first electrode coil and the same materials as the conductor for the second electrode. The second electrode coil is bonded to the second conductor coil and wound in the same direction. The thin design is motivated by an electrical field analysis which reveals that the length of the catheter is the important determinant of defibrillation efficacy, and that the large radius and surface area of prior art devices were less beneficial.

US Patent:

56626967, Sep 2, 1997

Filed:

Sep 28, 1995

Appl. No.:

8/535666

Inventors:

Mark W. Kroll - Minnetonka MN
Roger W. Dahl - Andover MN
Stephen K. Sundquist - Minnetonka MN
Randall S. Nelson - Pine Springs MN

International Classification:

A61N 1375
A61N 139

US Classification:

607116

Abstract:

The present invention is a one piece, disposable pulse generator emulator for emulating a subcutaneous implantable cardioverter defibrillator (ICD) having an active housing electrode. The emulator of the present invention is for use with an external test system to screen a patient for candidacy for an ICD by determining the patient's minimum defibrillation threshold voltage. The one piece, disposable emulator has a housing that has substantially the same conductive geometry as the desired implantable pulse generator.