| 摘要 |
A peristaltic fluid pump having a suction side and a pumping side. The pump comprises a pump housing (1) having a mainly arcuate support surface (4), a flexible tube (3) extending along this surface, a rotor (2) having two opposite rollers (10', 10") for during operation rolling over the flexible tube (3) along an entrance section (a-d) where the tube is successively compressed, a pumping section (d-e) extending across an angle of an arc of less than 180~, and an exit section (e-g) where the compression successively ends, and a motor (12) for during operation making the rotor (2) rotate. The arcuate support surface (4) is shaped in such a way that the rearmost and foremost rollers (10', 10") do not operate in synchronous phase opposition during their passage of the entrance and exit section respectively (a-d; e-g ). Thereby it is obtained that the peristaltic fluid pump is rendered capable o f pumping a fluid with less pressure difference and compressive pulsations in the fluid than hitherto known. The pump is especially suitable as blood pump for pumping the patient's blood through a dialyser.
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