OCCLUSION DETECTION FOR A FLUID INFUSION DEVICE

摘要

A device for delivering fluid to a user includes a housing, a drive motor assembly in the housing, a force sensor, and an electronics module. The drive motor assembly regulates delivery of fluid by actuating a piston of a fluid reservoir, and the force sensor generates output levels in response to force imparted thereto during, for example, fluid delivery operations. The electronics module processes the output levels of the force sensor to assess the operating health of the force sensor, to check for occlusions in the fluid delivery path, and to monitor the seating status of the fluid reservoir.

主权项

1. A device for delivering fluid to a user, the device comprising:
a housing; a reservoir cavity within the housing to accommodate fluid reservoirs; a drive motor assembly in the housing to regulate delivery of fluid by actuating a piston of a fluid reservoir; a force sensor associated with the drive motor assembly to generate output levels in response to force imparted thereto; and an electronics module coupled to the force sensor to process the output levels to detect occlusions in a fluid path of the device for a fluid delivery action by:
indicating an occlusion when a first rate of change of the output levels is greater than or equal to a first threshold value, the first rate of change based upon a first measurement window; andindicating an occlusion when both: (a) a second rate of change of the output levels is greater than or equal to a second threshold value, the second rate of change based upon a second measurement window; and (b) a current output level is greater than or equal to a threshold output level.