the signal converter 66 and are fed into the external controller 69 via the signal converter 68 in this case too the battery 70 can be implantable alternatively it is possible to design a blood pump system 71 such that the data from the power controller 73 sensor controller 74 and or motor controller 75 integrated into the blood pump 72 are not to be transferred to the external controller 77 via the tet connection 76 but an additional rf link 78 is to be used for this purpose as can be seen in fig8 in this case too the battery 79 can be implantable as shown in fig9 device 100 includes an implantable housing 110 housing 110 is a biocompatible material configured for implantation such as a biocompatible metal e g stainless steel or titanium and or a biocompatible plastic e g polysulfone or polyoxymethylene housing 110 includes an inlet 111 and an outlet 112 inlet 111 and outlet 112 are configured to each attach to a flexible conduit e g a flexible cannula or other tube for attachment to one or more blood locations such as the left atrium and an artery respectively housing 110 surrounds a pumping assembly 120 which includes rotor 125 a chamber 115 is located between housing 110 and pumping assembly 120 such that rotation of rotor 125 causes blood.