NEEDLE CANNULA POSITION AS AN INPUT TO OPERATIONAL CONTROL OF AN INJECTION DEVICE

摘要

A method is disclosed for state sensing and controlling of a multi-state drug delivery device. In some embodiments a power switch is reused as a state sensor. Optionally the state sensor may be toggled by user actions and/or the movements of parts of the device, for example needle and/or a protective element. Optionally, drug discharge and/or status indication is controlled in accordance with sensor output. In some embodiments control is by means of a processor. Alternatively or additionally, control is by means of simple physical circuits.

主权项

1. A method of reusing a power switch as a sensor to indicate multiple stages of operation of a delivery drug delivery device comprising:
providing a device where the power switch interrupts a power supply circuit; toggling of the switch to activate the device; engaging the device to a subject, said engaging causing a further toggling the switch while the device remains activated; initiating discharge of the drug in response to said further toggling of the switch.