Patent ID: 8715217

Claim:
A blood line for extracorporeal blood or plasma treatment comprising: a first line portion intended to be connected to an outlet of a filter, the first line portion having a first line passage section, a second line portion intended to be connected to a patient's vascular access, an infusion site acting between the first line portion and the second line portion, and intended to inject into the blood line a solution reestablishing blood or plasma ion balance, comprising: a first main channel in fluid communication with the first line portion and having a first passage section, a second main channel in fluid communication with the second line portion and having a second passage section, wherein a longitudinal axis of the first main channel of the infusion site is perpendicular to a longitudinal axis of the second main channel of the infusion site, means for the formation of a turbulence area located downstream from and in fluid communication with the first main channel, located upstream from and in fluid communication with the second main channel, the means for formation of a turbulence comprising a first fluid passage defining a reduction in a passage section and whose smallest passage section is smaller than the first passage section and smaller than the second passage section, wherein the first fluid passage of the turbulence area formation means defines a constant narrowing of internal circular section, thus resulting in a conical internal surface of revolution whose symmetry axis is a longitudinal axis of the first passage means, a secondary channel comprising an inlet for letting in a solution, reestablishing ion balance and an outlet in fluid communication with at least one of three elements chosen among the first main channel, the means for the formation of a turbulence area and the second main channel, wherein the turbulence area formation means include a second fluid passage downstream from the first fluid passage defining an increase in fluid passage section in a sense of fluid passage, the largest fluid passage section of the second fluid passage is smaller than said first passage section and smaller than said second passage section, and a ratio between a diameter of the smallest passage section of the first fluid passage and a diameter of the first line passage section is less than about 30%.