Ambulatory Infusion Devices With Improved Delivery Accuracy
First Claim
Patent Images
1. A method of operating an infusion device which includes a fluid transfer device configured to generate an expected volumetric flow through a fluid flow path when actuated, the method comprising the steps of:
- actuating the fluid transfer device in accordance with a delivery instruction that calls for a predetermined number of actuations;
determining the actual volumetric flow associated with at least some of the fluid transfer device actuations; and
adjusting the predetermined number of actuations in response to the actual volumetric flow being different than the expected volumetric flow.
1 Assignment
0 Petitions
Accused Products
Abstract
Infusion devices that are configured to measure fluid flow and to adjust delivery.
-
Citations
27 Claims
-
1. A method of operating an infusion device which includes a fluid transfer device configured to generate an expected volumetric flow through a fluid flow path when actuated, the method comprising the steps of:
-
actuating the fluid transfer device in accordance with a delivery instruction that calls for a predetermined number of actuations; determining the actual volumetric flow associated with at least some of the fluid transfer device actuations; and adjusting the predetermined number of actuations in response to the actual volumetric flow being different than the expected volumetric flow. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method of measuring fluid flow in an infusion device with a fluid flow path, the method comprising the steps of:
-
directly measuring pressure at a location in the fluid flow path that is one of upstream from or downstream from a flow restrictor; indirectly measuring pressure at a location in the fluid flow path that is the other of upstream from or downstream from the flow restrictor; determining a pressure differential across the flow restrictor; and calculating volumetric fluid flow based on the pressure differential. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. An infusion device, comprising:
-
a fluid transfer device configured to create an expected volumetric flow of fluid when actuated; and a controller, operably connected to the fluid transfer device, configured to actuate the fluid transfer device in accordance with a delivery instruction that calls for a predetermined number of actuations, determine the actual volumetric flow associated with at least some of the fluid transfer device actuations, and adjust the predetermined number of actuations in response to the actual volumetric flow being different than the expected volumetric flow. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
-
Specification