Infusion pump system and methods
View Patent ↗Some embodiments an infusion pump system can provide a suggested bolus dosage based on particular parameters (e.g., the user's recent blood glucose characteristics, food intake data, an amount of insulin already delivered to the user which has not yet acted on the user, or other factors). In some circumstances, the infusion pump system can receive information indicative of the user's blood glucose level and suggest an insulin bolus dosage that is at least partially dependent upon the recent rate of change in the user's blood glucose level. Such a feature can be helpful to a user when the infusion pump is operated in conjunction with a glucose monitoring device because the suggested bolus dosage can be at least partially based on recent data indicative of the user's blood glucose level.
1. A medical infusion pump system, comprising:
a portable pump housing that receives insulin for dispensation to a user, the pump housing at least partially containing a pump drive system to dispense the insulin through a flow path to the user;
a controller that communicates with the pump drive system to dispense the insulin from the portable pump housing; and
a monitoring device that communicates glucose information to the controller, the glucose information being indicative of a blood glucose level of the user,
wherein the controller displays a suggested bolus dosage in response to user input, the suggested bolus dosage being at least partially dependent upon both the blood glucose level of the user and a rate of change to the blood glucose level of the user,
wherein the controller determines the suggested bolus dosage based on the blood glucose level of the user, a rate of change to the blood glucose level of the user, user input of food intake information, and an estimate of an amount of insulin already delivered to the user which has not yet acted on the user, wherein the controller device determines the suggested bolus dosage in response to user input of food intake information, wherein the controller determines the suggested bolus dosage according to the function:
Suggested Bolus Dosage=(Food Offsetting Component)+(Blood Glucose Correction Component)−(Insulin Load Correction Component), and
wherein the controller determines the Blood Glucose Correction Component according to the function:
Blood Glucose Correction Component=(Current Blood Glucose Level−Target Glucose Level) * (Insulin Sensitivity) * [1+(Rate of Change * Scaling Factor)],
where Rate of Change represents a recent rate of change in the user's blood glucose level.
2. The system of claim 1 , wherein the monitoring device comprises: a portable housing wearable on the user's skin, a sensor shaft that penetrates into the user's skin, and a wireless communication device housed in the portable housing and configured to transmit the glucose information to said wireless communication device of the controller device.
3. The system of claim 1 , wherein the portable pump housing is configured to receive an insulin cartridge and a cap device that is attachable to the pump housing so as to seal the space after receiving the insulin cartridge, the cap device comprising a fluid flow path extending therethrough.
4. The system of claim 3 , further comprising the insulin cartridge, said insulin cartridge comprising a prefilled cartridge of the insulin configured to be slidably inserted into the space of the pump housing, wherein a flow path of the insulin comprises an infusion set tube that extends from the cap device to the user.