Use of one or more metrics to trigger electric pulse initiation and/or termination during control of actuation of a medicament delivery pump

A medicament delivery device, comprising:

• a medicament reservoir for storing medicament;
• a pump for pumping medicament from the medicament reservoir;
• a shape memory alloy (SMA) element for actuating the pump;
• a power source;
• a processor configured to:
• cause an electric pulse from the power source to be applied to the SMA element to cause actuation of the medicament pump to output medicament from the medicament reservoir;
• monitor resistance values of the SMA element;
• and
• terminate the application of the pulse to the SMA based on a metric reflective of the resistance values.

A medicament delivery device, comprising:

• a medicament reservoir for storing medicament;
• a pump for pumping medicament from the medicament reservoir;
• a shape memory alloy (SMA) element for actuating the pump;
• a power source;
• a temperature sensor for sensing temperature of the SMA element;
• a clock for outputting an indication of time;
• and
• a processor configured to:
• cause an electric pulse from the power source to be initially applied to the SMA element to actuate the medicament pump to output medicament from the medicament reservoir;
• monitor temperature values of the SMA element that were measured by the temperature sensor;
• and
• terminate the application of the pulse to the SMA element based on the temperature of the SMA element and time since the initial application of the electric pulse to the SMA element.