US 12,274,821 B2
Oxygenator
John Knoll, Minneapolis, MN (US); Neil Nye, Minneapolis, MN (US); Brian Steffens, Minneapolis, MN (US); and Michael Van Driel, Minneapolis, MN (US)
Assigned to Medtronic, Inc., Minneapolis, MN (US)
Filed by Medtronic, Inc., Minneapolis, MN (US)
Filed on Oct. 8, 2021, as Appl. No. 17/497,371.
Application 17/497,371 is a continuation of application No. 16/170,390, filed on Oct. 25, 2018, granted, now 11,141,517.
Prior Publication US 2022/0023520 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 1/16 (2006.01); A61M 1/36 (2006.01); B01D 63/04 (2006.01); B01D 71/26 (2006.01)
CPC A61M 1/1698 (2013.01) [A61M 1/1629 (2014.02); A61M 1/3623 (2022.05); A61M 1/3627 (2013.01); A61M 1/3638 (2014.02); B01D 63/04 (2013.01); B01D 71/261 (2022.08); A61M 2202/0225 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A blood oxygenator comprising:
a housing defining a volume within the housing, a plurality of zones dividing the volume,
a blood inlet, a blood outlet, and a blood flow path through the plurality of zones from the blood inlet to the blood outlet;
a membrane assembly disposed within the housing, the membrane assembly including a first plurality of gas exchange elements disposed in a first zone of the housing and a second plurality of gas exchange elements disposed in a second zone of the housing, one of the zones arranged around another zone, the first zone and the second zone being fluidly open to one another along a body of the plurality of gas exchange elements and fluidly separated from one another along a distal end of the housing, each of the plurality of gas exchange elements including an interior gas side and an exterior blood side;
in which the first zone may be fluidly connected to one of oxygen and negative pressure within the interior gas side of the first plurality of gas exchange elements of the first zone and the second zone may be fluidly connected to another of oxygen and negative pressure applied to the interior side of the second plurality of gas exchange elements in the second zone, and in which the blood flow path is sequential through the first zone and second zones to add oxygen to the blood and remove carbon dioxide from the blood at one of the first and second plurality of gas exchange elements, and to separate gaseous micro emboli from the blood at another of the first and second plurality of gas exchange elements.