Patent ID: 8545381

Claim:
An auxiliary artificial heart pump drive device for driving an auxiliary artificial heart pump, the pump drive device comprising: a pump drive processing circuit; first and second pump control parts arranged in duplexed configuration, each pump control part configured for controlling the auxiliary artificial heart pump by outputting a drive signal to the auxiliary artificial heart pump, wherein said each pump control part has a detection circuit configured to detect a failure state in the pump control part by using at least one monitoring result selected from the group of: an overcurrent of a power source line for supplying electricity to the auxiliary artificial heart pump drive device that exists for at least a period of time T 1 , an overvoltage of the power source line that exists for at least a period of time T 2 , and a temperature near the pump control part that exists for at least a period of time T 3 , wherein the relationship T 1 <T 2 <T 3 is satisfied, a switch circuit which, when the failure state is detected in the pump control part, is configured to electrically cut off a path through which the drive signal is outputted to the auxiliary artificial heart pump, and a power source switch which, when the failure state is detected in the pump control part, is configured to stop a supply of electricity to the pump control part, wherein when a normal state is detected by the detection circuit of the first pump control part, the switch circuit and the power source switch of the first pump control part are set in a conductive state by the pump drive processing circuit and the switch circuit and the power source switch of the second pump control part are set in a cut-off state by the pump drive processing circuit, and when the failure state is detected by the detection circuit of the first pump control part, the switch circuit and the power source switch of the first pump control part are set in the cut-off state by the pump drive processing circuit and the switch circuit and the power source switch of the second pump control part are set in the conductive state by the pump drive processing circuit.