The blood pump of the present invention comprises: a first casing (1), its rim forming an opening; a second casing (2) having an inlet opening at the top and an outlet opening at an arbitrary position; a pump base part (5) attached to the first and second casings to partition them, its one side facing and covering the rim of the first casing, and the other side facing the base rim of the second casing; a drive part (7) housed inside the first casing driving a rotation shaft with a boss on the tip going roughly through the middle of the pump base part; a plurality of impellers (11) extending in radial direction from the outer periphery of the boss; and a pump part (3) constituted by the concurrence of the plurality of impellers and the second casing, wherein the impellers' boss attachment parts are shifted forward towards the inlet opening. wherein one part is cut out in each of the plurality of impellers' surfaces to form a window opening part (13). As a result, the blood pump of the present invention ensures smooth blood flow and therefore allows to effectively prevent the development of thrombi.

A turbo blood pump having a small size, that is, a small amount of blood to be filled and capable of adjusting and maintaining the slight amount of flow, and a turbo blood pump in which hemolysis is not likely to occur even if it is used at a practically high rotational speed necessary to obtain a predetermined discharging ability. The turbo blood pump to be used includes a housing having an inlet port and an outlet port; and an impeller disposed rotatably in the housing; wherein the impeller includes at least a rotation shaft and an annular connection portion to which the plural vanes are attached. The vane is manufactured so that an inlet side part is in the skew position with respect to an outlet side part.

A device for oxygenating blood in an extracorporeal circuit includes a first structure suitable to delimit a portion of space-containing capillaries made of microporous membrane. The capillaries convey oxygen and are wet externally by blood flowing through a portion of space between an intake connector, which is connected to a venous line of the extracorporeal circuit, and a delivery connector. The device includes a second structure monolithically connected and contiguous to the first structure. The second structure is suitable to contain blood filtration means that divide the portion of space delimited thereby into a blood distribution chamber, provided with an air vent and connected to the delivery connector of the first structure, and a blood collection chamber provided with a delivery connector connected to the arterial line of the extracorporeal circuit.

A device for treating blood in an extracorporeal blood circuit, the device including a centrifugal pump provided with a transparent enclosure that is connected, by means of an inlet duct, to the outlet of a venous reservoir, the venous reservoir having an inlet that is connected to receive blood from a patient. The transparent enclosure of the pump is connected monolithically to the base of a structure that comprises a heat exchanger and an oxygenator. The structure also supports monolithically, at the peripheral region, an arterial filter that receives the blood in output from the oxygenator and is provided with a connector for coupling to an arterial line for return of the blood to the patient.