Four-way valve, in particular for dialysis treatment of blood

摘要

The invention relates to a four-way valve, intended to be used in a system for treating blood of a recipient patient, such as for blood dialysis by a dialyser or artificial kidney. This valve comprises two main pipes 1 and 3, which are opposite and connected, respectively for the inlet and outlet of the dialysis fluid, two pipes 11 and 13 branching from the proceeding ones, joined to the dialyser or treatment circuit, and controlled means 17, 19 for closing and opening the said pipes, which can close the connection of the main pipes 1 and 3 between the branch pipes 11 and 13, in the normal in-use position, and in the treatment termination position, can simultaneously close and open, respectively, each of the branch pipes 11 and 13 and the said connection between the main pipes 1 and 3. IMAGE