Occlusion detection system and method
AssigneeDEKA Products Limited Partnership
InventorsMarc A. Mandro, Robert J. Bryant
Life of this patent
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Abstract
A method, computer program product, and infusion pump assembly for determining a first rate-of-change force reading that corresponds to the delivery of a first dose of an infusible fluid via an infusion pump assembly. At least a second rate-of-change force reading is determined that corresponds to the delivery of at least a second dose of the infusible fluid via the infusion pump assembly. An average rate-of-change force reading is determined based, at least in part upon the first rate-of-change force reading and the at least a second rate-of-change force reading.
Claims11
An infusion pump assembly comprising:
- a control system to deliver doses of an infusible fluid of a first volume and a second volume, wherein the first volume and second volume are not the same, the control system configured to:
- determine a first volume initial force reading prior to dispensing a dose of the first volume of the infusible fluid;
- dispense a dose of the first volume of the infusible fluid;
- determine a first volume final force reading subsequent to dispensing a dose of the first volume of the infusible fluid;
- determine a first volume rate-of-change reading that corresponds to the delivery of the first dose of the infusible fluid via an infusion pump assembly by subtracting the first volume initial force reading from the first volume final force reading value;
- determine a second volume initial force reading prior to dispensing a dose of the second volume of the infusible fluid;
- dispense a dose of the second volume of the infusible fluid;
- determine a second volume final force reading subsequent to dispensing a dose of the second volume of the infusible fluid;
- determine a second volume rate-of-change reading that corresponds to the delivery of the second dose of the infusible fluid via an infusion pump assembly by subtracting the second volume initial force reading from the second volume final force reading value;
- compare the first volume rate-of-change reading to a first volume rate-of-change threshold to determine if the first volume rate-of-change reading exceeds the first volume rate-of-change threshold;
- if the first volume rate-of-change reading exceeds the first volume rate-of-change threshold, initiate an alarm on the infusion pump assembly;
- compare the second volume rate-of-change reading to a second volume rate-of-change threshold to determine if the second volume rate-of-change reading exceeds the second volume rate-of-change threshold;
- and
- if the second volume rate-of-change reading exceeds the second volume rate-of-change threshold, initiate an alarm on the infusion pump assembly.
An infusion pump assembly comprising:
- a control system configured to allow a user to set and change a threshold for an alarm:
- monitor a displacement of a displaceable mechanical component included within the infusion pump assembly;
- determine if the displaceable mechanical component was displaced an expected displacement in response to delivery of one of a first dose of an infusible fluid and a second dose of the infusible fluid by comparing the monitored displacement to the expected displacement;
- determine an initial force reading from a force sensor prior to dispensing the first dose and the second dose of the infusible fluid;
- determine a final force reading from the force sensor after dispensing the first dose and the second dose of the infusible fluid;
- compare, to the threshold, of the initial force reading or the final force reading to determine if the initial force reading or the final force reading exceeds the threshold;
- and
- if the initial force reading or final force reading exceeds the threshold, initiate an alarm on the infusion pump assembly.
Dependencies are inferred from the claim text.