CPC A61M 5/16831 (2013.01) [A61M 5/1452 (2013.01); A61M 5/1458 (2013.01); A61M 5/14244 (2013.01); A61M 5/14566 (2013.01); A61M 5/16804 (2013.01); A61M 2005/14506 (2013.01); A61M 2005/16863 (2013.01); A61M 2005/16868 (2013.01); A61M 2205/3331 (2013.01); A61M 2205/3365 (2013.01); A61M 2205/502 (2013.01); A61M 2230/201 (2013.01)] | 16 Claims |
1. A method of detecting an occlusion in a fluid path, the method comprising:
operating, by a control module of an infusion device, a driver module to provide energy to an actuation arrangement to achieve a commanded actuation state, wherein the actuation arrangement is coupled to a plunger configured to deliver fluid via the fluid path;
ceasing, by the control module, providing of the energy to the actuation arrangement after the actuation arrangement achieved the commanded actuation state;
subsequent to the actuation arrangement achieving the commanded actuation state, obtaining, by the control module, a measured actuation state of the actuation arrangement via a sensing arrangement, the measured actuation state being a state of the actuation arrangement in which the actuation arrangement moved in a direction reverse to a direction in which the actuation arrangement moved to achieve the commanded actuation state;
determining an acceleration of the actuation arrangement or the plunger for a drive cycle based at least in part on the measured actuation state; and
detecting, by the control module, an occlusion condition based on a difference between the determined acceleration and a reference acceleration for achieving the commanded actuation state and a relationship between the commanded actuation state and the measured actuation state.
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