Patent ID: 8900175

Claim:
A collecting device for biological fluids for medical use, comprising: a rigid container exhibiting a box conformation having a bottom wall, a lateral wall emerging from the bottom wall, and a closing portion located at a top of the lateral wall, the bottom wall, the lateral wall, and the closing portion internally defining at least a first chamber having a fixed volume; an auxiliary container having at least a deformable portion which is constrained to at least a corresponding portion of the lateral wall of the rigid container, said auxiliary container internally defining a second chamber having a variable volume according to a position of the deformable portion; at least a passage able to set the first chamber and the second chamber in fluid communication; at least one inlet port connected with at least one of the rigid container and the auxiliary container; and at least one exit port connected with at least one of the rigid container and the auxiliary container, wherein the deformable portion of the auxiliary container comprises at least one deformable wall peripherally constrained to the lateral wall of the rigid container, the rigid container and the auxiliary container are mutually flanked, and a portion of the lateral wall of the rigid container separates the first chamber and the second chamber and constitutes a portion of wall in common between the rigid container and the auxiliary container.