Infusion devices and related methods and systems for preemptive alerting
AssigneeMedtronic MiniMed, Inc.
InventorsCesar C. Palerm, Jeffrey C. Myers
Life of this patent
Estimating the term…
Abstract
Infusion systems, infusion devices, and related operating methods are provided. An exemplary method of alerting a user associated with an infusion device delivering fluid to the body of the user involves obtaining a measurement value for a physiological condition being influenced by the fluid, obtaining a current amount of active fluid in the body of the user, determining a homeostasis metric based at least in part on the current amount of active fluid and the measurement value for the physiological condition, and generating an alert based at least in part on the homeostasis metric.
Claims20
An infusion system comprising:
- a user interface;
- an infusion device operable to deliver fluid to a body of a user, the fluid influencing a physiological condition of the user;
- a sensing arrangement to obtain a measurement value for the physiological condition from the body of the user;
- and
- a control system to obtain the measurement value from the sensing arrangement, determine a homeostasis metric based at least in part on the measurement value and a current amount of active fluid in the body of the user, and generate an alert via the user interface based at least in part on the homeostasis metric.
An infusion system comprising:
- a user interface;
- an infusion device operable to deliver fluid to a body of a user, the fluid influencing a physiological condition of the user;
- a sensing arrangement including one or more interstitial sensing elements to periodically obtain interstitial fluid measurement values for the physiological condition from the body of the user;
- and
- a control system to obtain the interstitial fluid measurement values from the sensing arrangement and in response to each new interstitial fluid measurement value of the interstitial fluid measurement values:
- obtain a current amount of active fluid in the body of the user;
- determine an estimated correction bolus amount of the fluid based at least in part on the current amount of active fluid, a target value for the physiological condition, and a current interstitial fluid measurement value for the physiological condition;
- determine a trend adjustment factor based on a difference between the current interstitial fluid measurement value and a preceding interstitial fluid measurement value;
- adjust the estimated correction bolus amount by multiplying the estimated correction bolus amount by the trend adjustment factor;
- and
- generate an alert via the user interface when the estimated correction bolus amount is greater than an alert threshold value.
An infusion device comprising:
- a user interface;
- a motor operable to deliver fluid to a body of a user, the fluid influencing a physiological condition of the user;
- and
- a control system coupled to the motor and the user interface to:
- operate the motor to deliver the fluid;
- obtain a measurement value for the physiological condition in the body of the user;
- determine a current amount of active fluid in the body of the user;
- determine an amount of fluid pending delivery to the body of the user;
- determine a homeostasis metric based at least in part on the current amount of active fluid, the amount of fluid pending delivery, and the measurement value;
- and
- provide a notification via the user interface based at least in part on the homeostasis metric.
Dependencies are inferred from the claim text.