| CPC A61M 25/0026 (2013.01) [A61M 25/0009 (2013.01); A61M 25/0045 (2013.01); A61M 25/0053 (2013.01)] | 6 Claims |
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1. A medical multi-lumen tube comprising:
a plurality of inner layer tubes including:
a first inner layer tube; and
a second inner layer tube positioned outside the first inner layer tube, the second inner layer tube having a smaller outer diameter than the first inner layer tube; and
an outer layer covering the plurality of inner layer tubes,
wherein:
the outer layer comprises a first region and a second region that are connected to each other in an axial direction of the outer layer at a first joint part,
the first region comprises a first resin, and the second region comprises a second resin having different properties than the first resin;
in the outer layer, the first resin extends into the second region on both sides of the second inner layer tube in a circumferential direction so as to form a wave pattern in the first joint part between the first and second regions at least on a side of the outer layer in the circumferential direction where the second inner layer tube is located;
an amount of the first resin extending into the second region is larger on a side of the outer layer that is in contact with the first inner layer tube than on an outer side of the outer layer in a thickness direction of the outer layer; and
the first and second resins do not form the wave pattern in the first joint part between the first and second regions on a side of the outer layer in the circumferential direction where the second inner layer tube is not located.
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