Pump regulation device

Claim 1

A regulation device (21) for regulating at least one pump included in a flow circuit within a circulatory flow system for bypass assistance of an organ, said system comprising cannulae (1) and (14) situated respectively at the level of an outlet (2) and of an inlet (15) of the organ to be assisted, said cannulae (1.14) being connected by non-metallic connections to a flow circuit, said flow circuit comprising: a pump (7) with rollers (8) whose output is adjustable by adjusting the potential difference applied to its terminals, a filter (9) with means (10, 11) for taking the pressure upstream and downstream of this filter (9), means (24) for taking a real pressure in the organ, at least one means for pulsing the output from the pump (7) and air purging means (4, 13) disposed at the input and at the output of the circuit and an equal number of means (5, 12) for injecting products into said circuit, said regulation device comprising: means for recording the real pressure in the organ and a preprogrammed reference pressure, means for comparing said real pressure in the organ and the reference pressure and for emitting a signal proportional to the error, output ports connected to receive said signal, and alarm means controlled by the signal passing through at least one of said ports.