a unit forming device with a liquid for venoeses blood and with a filter for the collected blood go hand in hand.

摘要

A novel unitary device (1) for the treatment and collection of blood from two different sources during a surgical procedure comprises a hollow housing (3) made of a rigid, preferably transparent, material, first and second blood inlets (15, 23) in the housing, a first blood treatment element (11) inside the housing (3) comprising a layer of porous defoaming material (87) and a layer of non-woven depth filter material (89), and a second blood treatment element (13) inside the housing (3) comprising a layer of porous defoaming material (99) and free of any depth filter material. The novel device also includes means for providing two blood flow paths therein, one through the first inlet (15), the first blood treatment element (11), a blood collection reservoir (25) defined within the device and a treated blood outlet (29) in the bottom wall of the housing (3), and the other through the second inlet (23), the second blood treatment element (13), said blood colectin reservoir (25) and said blood outlet (29). The latter blood flow path bypassed at least the depth filter material layer (89) of the first blood treatment element (11). In typical use in an extracorporeal flow circuit, cardiotomy blood is introduced to the first inlet (15), venous return blood is introduced to the second inlet (23) and the common blood outlet (29) is connected to an extracorporeal blood pump. As a result, passage of the relatively clean venous return blood through a depth filter material is avoided.