| 摘要 |
The pump ( 10 ) comprises a drive portion ( 11 ) and a pump portion ( 12 ) which have such a small diameter that they can be pushed through a blood vessel ( 31 ). The pump portion ( 12 ) has a flexible cannula ( 18 ) connected thereto. In order to reduce the flow resistance of the cannula ( 18 ), the cannula ( 18 ) can be dilated to a diameter that is larger than that of the drive portion ( 11 ) and the pump portion ( 12 ), respectively. To be able to introduce the pump into the body by puncturing the blood vessel ( 31 ) according to the Seldinger technique, the cannula ( 18 ) is set into the constricted state in which it has a small diameter. In the blood vessel ( 31 ), it is dilated so that it offers a small flow resistance to the blood to be pumped there. |
