Abstract: A conduit forming unit includes: a cylindrical tubular body having flanges, on both end portions of the cylindrical tubular body; a first connection tubular body and a second connection tubular body respectively connected to a first end portion and a second end portion of the cylindrical tubular body; and tube joints for connecting the cylindrical tubular body and the first connection tubular body and the second connection tubular body to each other. The tube joint includes: a pawl equipped nut where a plurality of pawl portions which are engageable with the flange of the cylindrical tubular body are formed in the pawl equipped nut, the pawl portions engage with the flange so as to connect the first connection tubular body and the cylindrical tubular body to each other; and a retaining ring being annularly mountable on the pawl equipped nut and retaining engagement of the pawl portions with the flange.

Abstract: A conduit forming unit includes: a cylindrical tubular body having flanges, on both end portions of the cylindrical tubular body; a first connection tubular body and a second connection tubular body respectively connected to a first end portion and a second end portion of the cylindrical tubular body; and tube joints for connecting the cylindrical tubular body and the first connection tubular body and the second connection tubular body to each other. The tube joint includes: a pawl equipped nut where a plurality of pawl portions which are engageable with the flange of the cylindrical tubular body are formed in the pawl equipped nut, the pawl portions engage with the flange so as to connect the first connection tubular body and the cylindrical tubular body to each other; and a retaining ring being annularly mountable on the pawl equipped nut and retaining engagement of the pawl portions with the flange.

Abstract: A ventricular assist blood pump includes: a rotary part, a base part, and a housing. A value obtained by dividing an outer profile volume of the rotary part by a rotary volume of the rotary part is from 0.1 to 0.4. Assuming a volume which is a portion of a volume of a pump chamber and is disposed on a side where the rotary part exists obtained by partitioning by a predetermined plane P as a pump chamber main volume, a value obtained by dividing a rotary volume of the rotary part by the pump chamber main volume is from 0.4 to 0.7. A numerical value obtained by dividing the outer profile volume of the rotary part by the pump chamber main volume is from 0.05 to 0.2.