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US 11,471,575 B2Granted
Heat exchanger and oxygenator
AssigneeTerumo Kabushiki Kaisha
InventorsAkira Gyoten, Wataru Matsumoto
Life of this patent
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Abstract
A heat exchanger for a blood circulation circuit includes a hollow fiber membrane layer having a plurality of laminated hollow fiber membranes 31. Each of the hollow fiber membranes 31 has a barrier layer 5 having a hydrogen peroxide barrier property, and the barrier layer 5 has an oxygen permeability coefficient of 6 cc·cm/m2·24 h/atm or less at 25° C.
Claims20
A heat exchanger for a blood circulation circuit, comprising:
- a hollow fiber membrane layer having a plurality of hollow fiber membranes;
- and
- a housing receiving the hollow fiber membrane layer to define a first flow path including hollow portions of the hollow fiber membranes and to define a second flow path in a gap between the hollow fiber membranes, wherein one of the flow paths conveys blood and the other flow path conveys a heat medium;
- wherein each of the hollow fiber membranes is comprised of a plurality of laminated layers including a barrier layer having a hydrogen peroxide barrier property;
- and
- wherein the barrier layer has an oxygen permeability coefficient of 6 cc·cm/m2·24 h/atm or less at 25° C.
3 more elements
A heat exchanger for a blood circulation circuit, comprising:
- a hollow fiber membrane layer having a plurality of hollow fiber membranes;
- and
- a housing receiving the hollow fiber membrane layer to define a first flow path including hollow portions of the hollow fiber membranes and to define a second flow path in a gap between the hollow fiber membranes, wherein one of the flow paths conveys blood and the other flow path conveys a heat medium;
- wherein the hollow fiber membranes are comprised of a plurality of laminated layers in a thickness direction of the hollow fiber membranes;
- and
- wherein one of the layers is a barrier layer having a hydrogen peroxide barrier property with an oxygen permeability coefficient of 6 cc·cm/m2·24 h/atm or less at 25° C.
3 more elements
An oxygenator for a blood circulation circuit, comprising:
- a hollow fiber membrane layer having a plurality of hollow fiber membranes;
- and
- a housing receiving the hollow fiber membrane layer to define a first flow path including hollow portions of the hollow fiber membranes and to define a second flow path in a gap between the hollow fiber membranes, wherein one of the flow paths conveys blood and the other flow path conveys a heat medium;
- wherein each of the hollow fiber membranes is comprised of a plurality of laminated layers including a barrier layer having a hydrogen peroxide barrier property;
- and
- wherein the barrier layer has an oxygen permeability coefficient of 6 cc·cm/m2·24 h/atm or less at 25° C.
3 more elements
Dependencies are inferred from the claim text.