Oxygenator of hollow fiber membrane type
First Claim
1. An oxygenator of hollow fiber membrane type comprising a cylindrical core;
- a cylindrical hollow fiber membrane bundle consisting of a plurality of gas-exchange hollow fiber membranes wound on an outer surface of said cylindrical core;
a housing accommodating said cylindrical hollow fiber membrane bundle;
a gas inlet portion and a gas outlet portion both communicating with the interior of said hollow fiber membranes; and
a blood inlet portion and a blood outlet portion communicating with the outside of said hollow fiber membranes and the interior of said housing, wherein said hollow fiber membranes of said cylindrical hollow fiber membrane bundle are multi-layered on the outer surface of said cylindrical core;
each hollow fiber membrane layer has cross portions of the hollow fiber membranes in the neighborhood of a center of said cylindrical core in the longitudinal direction thereof and positions of said cross portions of each of said respective hollow fiber membrane layers are differentiated from one another to prevent contact between said cross portions of said hollow fiber membrane layers laminated on each other or to prevent contact between said cross portion of another hollow fiber membrane layer and cross portions of two hollow fiber membrane layers laminated on each other.
1 Assignment
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Accused Products
Abstract
An oxygenator of hollow fiber membrane type of the present invention includes a cylindrical core; a cylindrical hollow fiber membrane bundle consisting of a plurality of gas-exchange hollow fiber membranes wound on an outer surface of the cylindrical core; a housing accommodating the cylindrical hollow fiber membrane bundle; a gas inlet portion and a gas outlet portion both communicating with the interior of the hollow fiber membrane; and a blood inlet portion and a blood outlet portion communicating with the outside of the hollow fiber membrane and the interior of the housing. The hollow fiber membranes of the cylindrical hollow fiber membrane bundle wound on cylindrical core are multi-layered on the outer surface thereof. Each hollow fiber membrane layer has cross portions of the hollow fiber membranes in the neighborhood of the center of the cylindrical core in a longitudinal direction thereof. Positions of the cross portions of each of the respective hollow fiber membrane layers are differentiated from one another to prevent contact between the cross portions of the hollow fiber membrane layers laminated on each other.
26 Citations
13 Claims
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1. An oxygenator of hollow fiber membrane type comprising a cylindrical core;
- a cylindrical hollow fiber membrane bundle consisting of a plurality of gas-exchange hollow fiber membranes wound on an outer surface of said cylindrical core;
a housing accommodating said cylindrical hollow fiber membrane bundle;
a gas inlet portion and a gas outlet portion both communicating with the interior of said hollow fiber membranes; and
a blood inlet portion and a blood outlet portion communicating with the outside of said hollow fiber membranes and the interior of said housing,wherein said hollow fiber membranes of said cylindrical hollow fiber membrane bundle are multi-layered on the outer surface of said cylindrical core;
each hollow fiber membrane layer has cross portions of the hollow fiber membranes in the neighborhood of a center of said cylindrical core in the longitudinal direction thereof and positions of said cross portions of each of said respective hollow fiber membrane layers are differentiated from one another to prevent contact between said cross portions of said hollow fiber membrane layers laminated on each other or to prevent contact between said cross portion of another hollow fiber membrane layer and cross portions of two hollow fiber membrane layers laminated on each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- a cylindrical hollow fiber membrane bundle consisting of a plurality of gas-exchange hollow fiber membranes wound on an outer surface of said cylindrical core;
Specification