Blood pump with restart lockout
A control circuit includes a pump shutdown module responsive to one or more inputs indicating at least from the group consisting of an operational error at the implantable blood pump and an adverse physiological state of a user of the implantable blood pump. The pump shutdown module ceases operation of the implantable blood pump in response to the one or more inputs. A pump restart module configured to resume operation of the implantable blood pump in response to a first pump restart input and a second pump restart input is included. A pump restart lockout module configured to initiate a pump lockout mode in response to a lockout input is included. The pump lockout mode prevents resumption of operation of the implantable blood pump in response to the first pump restart input and allows resumption of operation of the implantable blood pump in response to the second pump restart input.
1. A method for controlling operation of an implantable blood pump having a motor with a control circuit, comprising:
providing, from an interface in communication with the control circuit, one or more inputs to a pump control module to initiate a run state of the motor;
providing, from the interface, one or more inputs to a pump shutdown module to cease operation of the motor;
receiving, at a pump restart module from the interface, one from the group consisting of a first pump restart input and a second pump restart input configured to resume operation of the motor, the second pump restart input being different from the first pump restart input;
measuring, at the control circuit, a duration of time in which operation of the motor has been stopped;
comparing the measured duration of time in which operation of the motor has been stopped to a predetermined threshold;
determining, at a pump restart module, whether the control circuit has initiated a pump lockout mode in response to a lockout input based on whether the measured duration of time in which operation of the motor has been stopped exceeds the predetermined threshold;
in response to a determination that the pump lockout mode has not been initiated:
resuming operation of the motor in response to one from the group consisting of the first pump restart input and the second pump restart input; and
in response to a determination that the pump lockout mode has been initiated:
resuming operation of the motor in response to the second pump restart input; and
maintaining cessation of operation of the motor in response to the first pump restart input.
2. The method of claim 1 , further comprising initiating the pump lockout mode at a predetermined amount of time after ceasing operation of the motor.
3. The method of claim 2 , wherein the predetermined amount of time is based on a predicted risk of thrombosis in the implantable blood pump.
4. The method of claim 3 , wherein the second pump restart input resets the predetermined amount of time.
5. The method of claim 1 , wherein the second pump restart input is a manual input.
6. The method of claim 1 , wherein the second restart pump input is inaccessible to a user of the implantable blood pump.
7. The method of claim 1 , further comprising, in response to a determination that the pump lockout mode has been initiated, clearing the pump lockout mode in response to the second pump restart input.
8. The method of claim 1 , further comprising notifying at least one of a user and a clinician of the implantable blood pump initiation of the pump lockout mode.