Medtronic, Inc.

John Michael Gray

James Martin Haase

Nicholas R Whitehead

Dale A Young

Cynthia R Nelson Konen

Thomas W Hovind

Ronald L Mezera

Steven T Deininger

Jeffrey P Bodner

Michael J Baade

Charles Randall Rogers

Ahmed M Elmouelhi

Katherine J Bach

David D Differding

Brian Mark Pattock

Steven D Byland

Brian C Egan

Christopher J Gaertner

Techniques are disclosed for reducing the accumulation of gases in an implantable infusion device. In one example, an implantable infusion device (IID) includes a housing, an expandable and contractible reservoir, and a standoff member. The expandable and contractible reservoir is configured to store a therapeutic agent and is arranged within the housing. A first end of the reservoir is configured to collapse toward a second end of the reservoir as the reservoir contracts. The standoff member is interposed between the first end and the second end of the reservoir and is configured to hold at least a portion of the first end offset from the second end when the reservoir is in a contracted state.

Implantable infusion device including anti-sealing reservoir

An implantable medical device is configured with a pressure sensor arranged within the device to reliably and accurately measure the pressure within a propellant gas chamber at least partially surrounding a therapeutic fluid reservoir of the device. In one example, a housing of the IMD includes a protrusion that is configured to provide clearance for fluid communication between a propellant gas chamber pressure sensor and the propellant gas chamber.

Implantable fluid delivery device including gas chamber pressure sensor

A radiopaque marker for inclusion within an implantable medical device (IMD) may comprise one or more radiopaque articles selected from a predetermined set of radiopaque articles. The one or more radiopaque articles may be carried by an object formed of or including, a desiccant. The predetermined set of radiopaque articles may undergo a single qualification process that approves the use of any combination of one or more of the articles as a radiopaque marker within an IMD. This allows a potentially-limitless number of markers to be made available based on a single qualification process. The radiopaque marker may serve to provide information such as the make, model, and feature set of the device.

Radiopaque markers for implantable medical devices

A method comprises measuring a volume of fluid delivered per pump stroke for each of a plurality of substantially identical medical pumps. The substantially identical medical pumps each have a fixed stroke length. The method further comprises: storing indications of the measured volumes on one or more data storage mediums; and for each of the plurality of substantially identical medical pumps, generating a separate therapy control program based on the indication of the measured volume associated with that one of the plurality of substantially identical medical pumps.

Medical pump with fixed stroke length

A medical pump subassembly comprises a magnetic cup forming a recess. The magnetic cup includes a protrusion within the recess. The cup forms a central aperture through the protrusion. The medical pump subassembly further comprises an electromagnetic coil within the recess and circumscribing the protrusion, a weld ring surrounding the recess, a barrier plate covering the recess, and a seal between the weld ring and the barrier plate to fluidically separate an interior of the cup from an external surface of the barrier plate.

Modular medical pump assembly

An accumulator is employed in an implantable infusion device to provide compliance in the flow path of the device. The accumulator may act to increase the pumping accuracy and repeatability while simultaneously reducing the energy requirements of the device. In one example, the accumulator is arranged at the outlet of a fluid delivery pump of the infusion device. The accumulator includes a cover and a diaphragm biased away from the cover and configured to deflect toward the cover under pressure generated by the therapeutic agent in a flow path of the infusion device. The cover of the accumulator is configured to withstand the pressure generated by the therapeutic agent in the flow path without deforming.

Accumulator for implantable infusion device

An electrochemical cell is provided that includes a current collector plate and a pellet. The current collector plate includes a circumferential outer peripheral wall and an inner wall coupled thereto, where the circumferential outer peripheral wall defines a cavity and has a height, and the inner wall extends across and physically separates the cavity into at least two regions and has a height that is less than the height of the circumferential outer peripheral wall. The pellet comprises active powder material and is disposed in the cavity and circumferentially surrounded by and in contact with the circumferential outer peripheral wall of the current collector plate. The pellet includes a first portion and second portion, where the first portion is disposed in a first region of the at least two regions and the second portion is disposed in a second region of the at least two regions.

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Brooklyn Park, MN, United States of America

John Michael Gray