Patent ID: 8876752

Claim:
A dialysis catheter comprising: a catheter body including a blood feed lumen and a blood removal lumen partitioned by a dividing wall, the blood feed lumen including a blood feed hole formed at a tip end of the blood feed lumen and the blood removal lumen including a blood removal hole formed at a tip end of the blood removal lumen, the tip end of the blood removal lumen being positioned proximal to the tip end of the blood feed lumen towards a base end of the catheter body, the catheter body comprising: a first portion including the blood feed lumen formed to a prescribed length from a tip-end side of the catheter body within an area between the blood removal hole and the blood feed hole, the first portion comprising a thickened part; a second portion proximal of the blood removal hole including the blood feed lumen and the blood removal lumen, the second portion including a cross-sectional shape from the blood removal hole to the base end which is substantially circular, and a cross-sectional area of the first portion including the thickened part is less than a cross-sectional area of the second portion; and a third portion connecting the first portion and the second portion, the third portion comprising an extension part having a substantially semicircular cross-sectional shape and including a flat surface part provided as an extension of the dividing wall and forming part of a peripheral wall of the blood feed lumen, and a curved surface part forming part of a peripheral wall of the blood feed lumen outside the dividing wall, and a connecting part for connecting the extension part and the first portion, wherein a top part of the thickened part on the first portion and a top part of the blood removal hole which has a substantially semicircular cross section in the second portion overlap each other when the catheter body is seen from the tip-end side.