INFUSION DEVICES AND RELATED CONSUMABLE CALIBRATION METHODS

• US 20180221576A1
• Filed: 02/07/2017
• Published: 08/09/2018
• Est. Priority Date: 02/07/2017
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Bazargan, Afshin
• Granted Patent: US 10,363,365 B2
• Time in Patent Office: Days
• CPC Class Codes: A61M 2205/3584 using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/502 User interfaces, e.g. screens or keyboards
• CPC Class Codes: A61M 2205/52 with memories providing a history of measured variating parameters of apparatus or patient
• CPC Class Codes: A61M 2205/6072 Bar codes
• CPC Class Codes: A61M 2205/70 with testing or calibration facilities
• CPC Class Codes: A61M 2230/201 Glucose concentration
• CPC Class Codes: A61M 5/14216 Reciprocating piston type
• CPC Class Codes: A61M 5/14228 with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: G16H 20/17 delivered via infusion or injection
• CPC Class Codes: G16H 40/63 for local operation

Abstract

Infusion systems including infusion devices and consumables and related operating methods are provided. An exemplary method of operating an infusion device operable to deliver a fluid influencing a physiological condition to a body of a user involves a control module of the infusion device obtaining calibration data associated with a consumable coupled to the infusion device via an interface of the infusion device, determining a delivery command for delivering the fluid to the body of the user based at least in part on the calibration data, and operating a pumping mechanism to deliver the fluid from a reservoir of the consumable to the body of the user in accordance with the delivery command.

Claims

1. A system comprising:

a consumable including a pumping mechanism for dispensing a fluid and a readable element maintaining calibration data characterizing a relationship between delivery of the fluid and actuation of the pumping mechanism; and

an infusion device including an interface to obtain the calibration data from the readable element, an actuation arrangement configured to actuate the pumping mechanism and a control module coupled to the interface and the actuation arrangement to determine a delivery command based at least in part on the calibration data and operate the actuation arrangement in accordance with the delivery command.

2. The system of claim 1, wherein:

the infusion device comprises a housing including a portion for receiving the consumable; and

the interface is disposed proximate the portion of the housing.

3. The system of claim 1, wherein:

the interface comprises a radio frequency identification (RFID) reader; and

the readable element comprises a radio frequency identification (RFID) tag associated with the consumable.

4. The system of claim 1, wherein:

the interface comprises a barcode scanner; and

the readable element comprises a barcode on the consumable.

5. The system of claim 1, wherein the consumable includes a second interface coupled to the interface of the infusion device.

6. The system of claim 1, wherein:

the pumping mechanism comprises a piston pump including a piston; and

the actuation arrangement includes a drive element configured to displace the piston.

7. An infusion device comprising:

a housing including a portion for receiving a consumable;

an interface proximate the portion of the housing to obtain calibration data from the consumable;

an actuation arrangement contained within the housing and configured to actuate a pumping mechanism operable to dispense a fluid from the consumable; and

a control module coupled to the interface and the actuation arrangement to determine a delivery command based at least in part on the calibration data and operate the actuation arrangement in accordance with the delivery command.

8. The infusion device of claim 7, wherein the actuation arrangement includes:

a motor; and

a drive element coupled to the motor, wherein at least a portion of the drive element extends into the portion of the housing to engage the pumping mechanism.

9. The infusion device of claim 7, wherein the interface comprises a radio frequency identification (RFID) reader.

10. The infusion device of claim 7, wherein the interface comprises a barcode scanner.

11. The infusion device of claim 7, wherein the interface comprises a bus interface integral with a surface of the portion of the housing.

12. The infusion device of claim 7, wherein the interface comprises an electrical terminal integral with a surface of the portion of the housing.

13. The infusion device of claim 7, wherein the pumping mechanism is integrated with the actuation arrangement.

14. A method of operating an infusion device operable to deliver a fluid influencing a physiological condition to a body of a user, the method comprising:

obtaining, by a control module of the infusion device via an interface of the infusion device, calibration data associated with a pumping mechanism of a consumable coupled to the infusion device;

determining, by the control module, a delivery command for delivering the fluid to the body of the user based at least in part on the calibration data; and

operating, by the control module, an actuation arrangement engaging the pumping mechanism to deliver the fluid from the consumable in accordance with the delivery command.

15. The method of claim 14, further comprising:

obtaining, by the control module, one or more measurement values indicative of the physiological condition in the body of the user from a sensing arrangement; and

determining, by the control module, a dosage of the fluid to be delivered based at least in part on the one or more measurement values and a target value for the physiological condition in the body of the user, wherein determining the delivery command comprises the control module determining the delivery command based at least in part on the dosage and the calibration data.

16. The method of claim 15, wherein determining the delivery command comprises converting the dosage to an amount of actuation of the pumping mechanism using the calibration data.

17. The method of claim 14, the pumping mechanism being incorporated with the consumable and the infusion device including the actuation arrangement engageable with the pumping mechanism, wherein:

determining the delivery command comprises;

determining an amount of actuation of the pumping mechanism for achieving a dosage of the fluid based at least in part on the calibration data; and

determining a commanded amount of actuation of the actuation arrangement to achieve the amount of actuation of the pumping mechanism; and

operating the pumping mechanism comprises operating the actuation arrangement to achieve the commanded amount of actuation.

18. The method of claim 14, wherein obtaining the calibration data comprises reading the calibration data from a readable element associated with the consumable.

19. The method of claim 14, wherein obtaining the calibration data comprises retrieving the calibration data via the interface of the infusion device from a corresponding interface of the consumable.

20. The method of claim 14, wherein obtaining the calibration data comprises receiving the calibration data from the consumable via a communications interface of the infusion device.