Monitoring the operating health of a force sensor in a fluid infusion device
First Claim
Patent Images
1. A device for delivering fluid to a user, the device comprising:
- a housing;
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 determine if the fluid reservoir is seated within the housing and the electronics module;
determines a baseline actuation force imparted to the force sensor during a priming operation;
determines a measured actuation force imparted to the force sensor during a fluid delivery operation;
compares the measured actuation force to a force threshold and the baseline actuation force; and
initiates corrective action if the measured actuation force is less than a difference between the baseline actuation force and the force threshold.
0 Assignments
0 Petitions
Accused Products
Abstract
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.
154 Citations
18 Claims
-
1. A device for delivering fluid to a user, the device comprising:
-
a housing; 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 determine if the fluid reservoir is seated within the housing and the electronics module; determines a baseline actuation force imparted to the force sensor during a priming operation; determines a measured actuation force imparted to the force sensor during a fluid delivery operation; compares the measured actuation force to a force threshold and the baseline actuation force; and initiates corrective action if the measured actuation force is less than a difference between the baseline actuation force and the force threshold. - View Dependent Claims (2, 3, 4)
-
-
5. A device for delivering fluid to a user, the device comprising:
-
a housing; 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, the force sensor disposed in the housing proximal to the drive motor assembly and between a proximal end of the drive motor assembly and a proximal end of the housing; and an electronics module coupled to the force sensor to process the output levels to determine a rewind force imparted to the force sensor during a rewind operation, wherein the electronics module initiates corrective action when the rewind force is not within a specified range. - View Dependent Claims (6, 7, 8, 9, 10)
-
-
11. A device for delivering fluid to a user, the device comprising:
-
a housing; 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, the force sensor disposed in the housing proximal to the drive motor assembly and between a proximal end of the drive motor assembly and a proximal end of the housing; and an electronics module coupled to the force sensor to process the output levels to determine a rewind force imparted to the force sensor during a rewind operation and to determine if the fluid reservoir is seated in the housing, wherein the electronics module initiates corrective action when the rewind force is not within a specified range. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
Specification