Patent ID: 8840382

Claim:
A blood-pumping device, comprising: a cavity with an at least partly U-shaped wall, the at least partly U-shaped wall comprises two straight regions and an arch-shaped region connecting the two straight regions; a U-shaped tube of a deformable material for carrying blood, which is at least partially aligned with the at least partly U-shaped wall of the cavity to provide a support for the U-shaped tube, wherein the U-shaped tube comprises a first and a second straight region connected by a semicircular region; and an arm being rotatable about a center point of the semicircular region, wherein the arm holds a first and a second wheel in a distance from each other such that upon rotation of the arm the wheels roll along the U-shaped tube thereby exerting a pressure on the U-shaped tube, wherein the arch-shaped region of the U-shaped wall of the cavity comprises a recess portion, wherein the recess portion has a depth profile adapted to a desired pressure profile of the blood flow and comprises a movable alignment piece, which is movable in a direction away from the center point, and wherein said arch-shaped region and said recess portion are arranged such that the pressure exerted by one of the wheels at the recess portion is less than the pressure exerted by the one wheel on the U-shaped tube at the arch-shaped region at a position outside said recess portion, thereby generating a pulsating blood flow inside the U-shaped tube upon rotation of the arm, wherein the moveable alignment piece comprises an indicator for indicating gradations of distance between an original position of the moveable alignment piece and the U-shaped tube.