OCCLUSION DETECTION FOR A FLUID INFUSION DEVICE
First Claim
Patent Images
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; and
indicating 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.
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.
-
Citations
20 Claims
-
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; and indicating 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A device for delivering fluid to a user, the device comprising:
-
a housing; a reservoir cavity within the housing to accommodate a fluid reservoir; a drive motor assembly in the housing to regulate delivery of fluid by actuating a piston of the 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; and indicating 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,wherein the first measurement window and the second measurement window represent a volume of fluid dispensed from the fluid reservoir relative to a reference volume measurement. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
19. A device for delivering fluid to a user, the device comprising:
-
a housing; a reservoir cavity within the housing to accommodate a fluid reservoir; a drive motor assembly in the housing to regulate delivery of fluid by actuating a piston of the fluid reservoir; a force sensor associated with the drive motor assembly to generate output levels in response to force imparted thereto and each of the output levels represents a measure of actuation force imparted to the force sensor during the fluid delivery action; 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; and indicating 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,wherein the first measurement window and the second measurement window represent a volume of fluid dispensed from the fluid reservoir relative to a reference volume measurement and the first threshold value is greater than the second threshold value. - View Dependent Claims (20)
-
Specification