Abstract: A method of pressure management of a drug delivery device including a pump, a fluid line, and a power source, includes: actuating the pump a predetermined number of cycles to move fluid through the fluid line, wherein the predetermined number of cycles is greater than one; determining an estimated pressure value within the fluid line for each cycle of the predetermined number of cycles; and determining a baseline pressure level comprising an average of the estimated pressure values.

Abstract: A drug delivery device includes a power source, a reservoir configured to receive a fluid, a fluid line in fluid communication with the reservoir, a pump configured to deliver a fluid from the reservoir to the fluid line, and a power limitation subsystem configured to limit a power level supplied to the pump.

Abstract: A method of pressure management for a drug delivery device including a pump, a fluid line, and a power source, includes: delivering fluid through the fluid line via the pump; determining a parameter indicative of pressure within the fluid line; determining whether the parameter indicative of pressure within the fluid line exceeds a pressure threshold level; pausing the delivery of fluid through the fluid line until a predetermined condition is satisfied; and resuming the delivery of the fluid through the fluid line after the predetermined condition is satisfied.

Abstract: A method for testing a drug delivery device including a piezoelectric transducer, a microcontroller, and a DC power source, with the piezoelectric transducer having an operative state and inoperative state. The method includes providing a drive signal to the piezoelectric transducer of the drug delivery device, determining an actuation voltage value or an actuation current value, and comparing the actuation voltage value or the actuation current value to a baseline value to determine whether the piezoelectric transducer is in the operative state or the inoperative state.