Erik Griswold

US Patent:

8478431, Jul 2, 2013

Filed:

Mar 14, 2011

Appl. No.:

13/047456

Inventors:

Erik Griswold - Mill Valley CA, US
James Calvin Allan - Santa Rosa CA, US
Don Tran - Novato CA, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N 1/00

US Classification:

607128

Abstract:

A fixation device for retaining a leadless medical implant to tissue includes an array of elongate tines having self-expanding distal portions. The fixation tines may be advanced between an implant body and an outer jacket to deploy the tines from a delivery configuration in which the tines are constrained by the outer jacket to an expanded configuration in which the distal end portions of the tines are released from the outer jacket. The implant and fixation device are contained within a sheath for delivery to the treatment site and a pusher within the sheath advances the fixation device relative to the implant body and deploys the tines. A distal end of the implant having an electrode may form a distal tip of the delivery system, and a potential implantation site may be tested prior to deployment of the fixation device to allow for easy repositioning of the implant.

US Patent:

8532790, Sep 10, 2013

Filed:

Apr 13, 2010

Appl. No.:

12/759173

Inventors:

Erik Griswold - Mill Valley CA, US

Assignee:

Medtronic, Inc. - Minneapolis MN

International Classification:

A61N 1/00

US Classification:

607126

Abstract:

A fixation device for retaining a leadless medical implant to tissue includes an annular collar and an array of self-expanding tines extending from the collar. When deployed, the annular collar encircles the implant and the tines are preset to splay outwardly from the implant to grab body tissue and anchor the implant at a treatment site. The implant and fixation device are contained within a sheath for delivery to the treatment site and a pushing force is applied to a pusher of the delivery system to distally advance the fixation device relative to the implant and deploy the tines. A distal end of the implant having an electrode may form a distal tip of the delivery system, and a potential implantation site may be tested prior to deployment of the fixation device to allow for easy repositioning of the implant if the potential implantation site is determined to be unacceptable.

US Patent:

20150273207, Oct 1, 2015

Filed:

Apr 1, 2014

Appl. No.:

14/231976

Inventors:

- Minneapolis MN, US
Brent L. Locsin - San Francisco CA, US
William A. Berthiaume - Santa Rosa CA, US
Maria E. Valdovinos - Santa Rosa CA, US
H. Allan Steingisser - Santa Rosa CA, US
Erik Griswold - Penngrove CA, US

International Classification:

A61N 1/05

Abstract:

A tether subassembly, which may be employed by a tool that deploys an implantable medical device, includes a test segment for verification of adequate fixation of the device at an implant site. When the device is located in proximity to a distal opening of the tube, a tether first length extends through an attachment structure of the device and within an elongate tube of the tool, a tether second length extends alongside the tether first length within the tube, and the test segment is located in proximity to the distal opening. The test segment is configured so that only a tug force, applied to the tether first length, and greater than or equal to a predetermined force, can pull the test segment through an aperture, either of the delivery tool or of the device. The predetermined force corresponds to a minimum adequate fixation force for the device.

US Patent:

20150273212, Oct 1, 2015

Filed:

Apr 1, 2014

Appl. No.:

14/242123

Inventors:

- Minneapolis MN, US
Don H. Tran - Novato CA, US
Brent L. Locsin - San Francisco CA, US
Maria E. Valdovinos - Santa Rosa CA, US
H. Allan Steingisser - Santa Rosa CA, US
Erik Griswold - Penngrove CA, US

International Classification:

A61N 1/05
A61M 25/01
A61B 6/12
A61B 17/34

Abstract:

A tool of an interventional medical systems system includes a core configured to be temporarily attached to the implantable medical device, as the tool deploys the device to expose a fixation member of the device for engagement with tissue at a target implant site; the core is then employed to verify adequate fixation of the deployed device via a tug test. An operator determines that the device is adequately fixed by the engaged fixation member, if a tug force that is applied to the core modifies the temporary attachment between the core and the device, to allow release of the device from the temporary attachment. A tether, which is fixedly attached to the core, may be employed to create the temporary attachment between the core and the device, or the temporary attachment may be created by a snap fit formed between the core and the attachment structure of the device.