Event detection for drug delivery system
A drug delivery device may include an Inertial Measurement Unit (IMU) is provided. The IMU may include an accelerometer, a magnetometer, or a gyroscope. Motion parameters may be detected when the drug delivery device is shipped, being prepared for activation for use, or during use. The IMU may provide data indicative of a rapid deceleration, such as when a package containing the drug delivery device is dropped, or some other physical event experienced by the drug delivery device. The drug delivery device may also include internal or external pressure sensors or a blood glucose sensor that may coordinate with the IMU to provide additional feedback regarding the status of the device or user. A controller of the drug delivery device may generate a response depending on the particular parameters being monitored or may change device operational parameters as a result of detected system events.
1. An apparatus, comprising:
a memory operable to store a plurality of movement profiles of a needle deployment component, wherein the movement profiles comprise parameter values indicative of motion of the needle deployment component;
a processor, at least a portion of which is implemented in circuitry coupled to the memory; and
an inertial measurement unit coupled to the processor and having at least one of an accelerometer or a gyroscope, wherein the inertial measurement unit is operable to:
determine parameters of the motion of the needle deployment component based on signals received from the at least one of the accelerometer or the gyroscope; and
generate one or more signals indicative of the determined parameters of the motion of the needle deployment component,
wherein the processor is operable to:
detect motion of the needle deployment component;
compare the detected motion of the needle deployment component to each movement profile of the plurality of movement profiles;
determine an operational mode of the needle deployment component based on the comparison; and
adjust operational parameters affecting delivery of a liquid drug based on the determined operational mode of the needle deployment component.
2. The apparatus of claim 1 , wherein the needle deployment component, upon activation, is configured to drive a needle and a cannula into a user and to retract the needle leaving the cannula coupled to the user.
3. The apparatus of claim 1 , wherein the inertial measurement unit is further operable to determine at least one of:
one or more directions of movement of the needle deployment component relative to three orthogonal reference axes,
an amount of movement for each of the determined one or more directions of movement,
a timing for each of the determined one or more directions of movement,
a duration for each of the determined one or more directions of movement, or
a sequence of the determined one or more directions of movement.
4. The apparatus of claim 1 , wherein the processor is further operable to: compare the detected motion of the needle deployment component to an early deployment profile, wherein the early deployment profile relates to movement of the needle deployment component prior to a drug delivery device containing the needle deployment component being attached to a user.
5. The apparatus of claim 1 , wherein the processor is further operable to:
compare the detected motion of the needle deployment component to a partial deployment profile, wherein the partial deployment profile relates to a needle not retracting after being inserted into a user.
6. The apparatus of claim 1 , wherein the processor is further operable to:
compare the detected motion of the needle deployment component to a non-deployment profile, wherein the non-deployment profile relates to the needle deployment component not activating in response to an attempted activation of the needle deployment component.
7. The apparatus of claim 1 , wherein the processor is further operable to: compare the detected motion of the needle deployment component to a full deployment profile, wherein the full deployment profile relates to the needle deployment component driving a needle and a cannula into a user, retracting the needle, and leaving the cannula coupled to the user.
8. The apparatus of claim 1 , wherein the processor is further operable to:
determine the operational mode of the needle deployment component based on determining that the detected motion matches at least one of a full deployment profile, a non-deployment profile, an early deployment profile, or a partial deployment profile of the needle deployment component.
9. The apparatus of claim 1 , further comprising:
a user interface, wherein the user interface is operable to:
present a notification indicating the determined operational mode of the needle deployment component.