Medtronic, Inc.

Medtronic Vascular, Inc.

Laxen, Michael

John I Knoll

Robert Olsen

Gregory Hake

Brian J Steffens

Stephen Roller

Patrick Cloutier

Chris Plott

Al McLevish

Ming Li

Michael Laxen

Michael R Van Driel

Neil Nye

James Beavers

Todd Romine

Brian Steffens

Systems and methods for monitoring oxygenator performance in extracorporeal circuit systems or the like. More particularly, the disclosure relates to systems and methods including a controller programmed to determine oxygenator apparatus flow impedance as a function of an inlet pressure measurement, an outlet pressure measurement and a blood flow rate measurement. The systems and methods may include a communication device that receives signals from the controller to communicate information regarding oxygenator apparatus performance.

Systems and methods for oxygenator performance evaluation

An oxygenator apparatus for use in an extracorporeal circuit. The apparatus includes a housing and a membrane assembly disposed within the housing. The membrane assembly includes a first plurality of gas exchange elements disposed in a first zone and a second plurality of gas exchange elements disposed in a second zone. The second zone is arranged concentrically around the first zone. The first and second plurality of gas exchange elements are fluidly open along a body and fluidly separated along a distal end. The first zone is configured to be fluidly coupled to an oxygen source and the second zone is configured to be fluidly coupled to a negative pressure source. A blood flow path includes a generally radial flow through the first zone to add oxygen to the blood and the second zone to separate gaseous micro emboli from the blood through the plurality of gas exchange elements.

Oxygenator

A capillary tube bundle sub-assembly for use in an extracorporeal heat exchanger includes a continuous capillary tubing wound about a core to define a plurality of capillary layers each including a plurality of capillary segments. The capillary segments each define opposing terminal ends adjacent opposing ends of the core. The capillary segments of each layer are circumferentially aligned relative to an axis of the core, with each successive layer being radially outward of an immediately preceding layer. The capillary segments are non-parallel with the axis, spiraling partially about the axis in extension between the opposing terminal ends. Each capillary segment forms less than one complete revolution (i.e., winds less than 360&#xb0;). The segments within each layer are substantially parallel with one another; however, an orientation of the segments differs from layer-to-layer such as by pitch or angle.

Wound heat exchanger

An apparatus for de-aering, oxygenating and controlling a temperature of blood in an extracorporeal blood circuit. The apparatus includes a housing, a manifold body, a heat exchanger, and an oxygenator. A blood inlet tangentially directs blood into a first chamber of the housing. The manifold body is disposed in a second chamber, and includes a core and a plurality of vanes that define channels. The heat exchanger is arranged around the manifold body, and the oxygenator around the heat exchanger. The channels are open to the heat exchanger. An established blood flow path includes rotational flow within the first chamber to separate air from the blood, generally longitudinal flow from the first chamber and along the channels, and generally radial flow through the heat exchanger and the oxygenator. With this construction, gross air removal occurs prior to the blood passing through the heat exchanger and oxygenator.

De-airing oxygenator for treating blood in an extracorporeal blood circuit

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Minneapolis, MN, United States of America

John I Knoll