Infusion devices with distributed motor control and related operating methods

Patent metadata

Field	Value
Publication number	US-2016346458-A1
Application number	US-201514721800-A
Country	US
Kind code	A1
Filing date	May 26, 2015
Priority date	May 26, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

Infusion systems, infusion devices, and related operating methods are provided. An exemplary infusion device includes a motor operable to deliver fluid to a body of a user, a first control module, and a second control module. The first control module and the second control module are coupled to one another. The first control module enables input power for the motor in accordance with a handshaking sequence of communications between the first control module and the second control module and provides a dosage command to the second control module, with the second control module operating the motor using the input power based on the dosage command in accordance with the handshaking sequence of communications.

First claim

What is claimed is:

1 . An infusion device comprising:
a motor operable to deliver fluid to a body of a user; a first control module; and a second control module coupled to the first control module, the first control module enabling input power for the motor in accordance with a handshaking sequence of communications between the first control module and the second control module and providing a dosage command to the second control module, the second control module operating the motor using the input power based at least in part on the dosage command in accordance with the handshaking sequence of communications.

2 . The infusion device of claim 1 , further comprising a driver module coupled to the motor, wherein:
the first control module enables the input power to the driver module; and the second control module operates the driver module to deliver a portion of the input power to the motor in accordance with the dosage command.

3 . The infusion device of claim 2 , further comprising a first switching arrangement coupled between the driver module and an energy source, wherein the first control module is coupled to the first switching arrangement and operates the first switching arrangement to provide a path for the input power from the energy source to the driver module in accordance with the handshaking sequence of communications.

4 . The infusion device of claim 2 , wherein the second control module enables output power from the driver module to the motor in accordance with the handshaking sequence of communications prior to operating the driver module to deliver the portion of the input power to the motor.

5 . The infusion device of claim 4 , further comprising:
a first switching arrangement coupled between the driver module and an energy source, the first control module being coupled to the first switching arrangement to operate the first switching arrangement to provide a path for the input power from the energy source to the driver module in accordance with the handshaking sequence of communications; and a second switching arrangement coupled between the driver module and the motor, the second control module being coupled to the second switching arrangement to operate the second switching arrangement to provide a path for the output power from the driver module to the motor in accordance with the handshaking sequence of communications.

6 . The infusion device of claim 1 , the handshaking sequence of communications including a first handshaking sequence comprising a delivery request message, the first control module communicating the delivery request message to the second control module, wherein the first control module enables the input power in response to receiving an acknowledgment from the second control module.

7 . The infusion device of claim 1 , wherein the first control module automatically disables the input power in accordance with the handshaking sequence of communications after providing the dosage command to the second control module in response to an absence of a completion message from the second control module within a timeout period associated with the dosage command.

8 . The infusion device of claim 1 , further comprising a user interface element to output a user notification, wherein the first control module is coupled to the user interface element and automatically generates the user notification in accordance with the handshaking sequence of communications in response to an absence of a communication from the second control module within a timeout period prescribed by the handshaking sequence.

9 . An infusion device comprising:
a motor operable to deliver fluid to a body of a user; a driver module coupled to the motor; a first control module to provide a delivery request, enable input power to the driver module in response to an acknowledgment of the delivery request, and provide a delivery message after enabling the input power; and a second control module coupled to the driver module and the first control module to provide the acknowledgment to the first control module in response to the delivery request and operate the driver module to provide the input power to the motor based on the delivery message.

10 . The infusion device of claim 9 , wherein the first control module maintains the input power to the driver module disabled in an absence of the acknowledgement within a timeout period associated with the delivery request.

11 . The infusion device of claim 9 , further comprising a user interface element to output a user notification, wherein the first control module is coupled to the user interface element and automatically generates the user notification in an absence of the acknowledgement within a timeout period associated with the delivery request.

12 . The infusion device of claim 9 , the first control module providing an authorization message after enabling the input power and prior to providing the delivery message, wherein the second control module enables output power from the driver module in response to the authorization message.

13 . The infusion device of claim 12 , wherein the second control module automatically disables the output power from the driver module in response to an absence of the delivery message from the first control module within a timeout period.

14 . The infusion device of claim 9 , wherein the first control module automatically disables the input power to the driver module after providing the delivery message in response to an absence of a drive completion message from the second control module within a timeout period associated with the delivery message.

15 . A method of operating a motor of an infusion device, the method comprising:
enabling, by a first control module of the infusion device, input power from an energy source to a driver module coupled between the energy source and the motor in accordance with a first sequence of communications between the first control module and a second control module of the infusion device; after enabling the input power, enabling, by the second control module, output power from the driver module to the motor in accordance with a second sequence of communications between the first control module and the second control module; and after enabling the output power from the driver module, operating the driver module to provide the input power to the motor in accordance with a third sequence of communications between the first control module and the second control module.

16 . The method of claim 15 , wherein enabling the input power comprises the first control module communicating a request to the second control module and automatically enabling the input power in response to receiving an acknowledgment to the request from the second control module.

17 . The method of claim 16 , wherein enabling the output power comprises the second control module automatically enabling the output power in response to receiving an authorization message from the first control module after providing the acknowledgment.

18 . The method of claim 17 , wherein operating the driver module in accordance with the third sequence of communications comprises the second control module automatically disabling the output power in response to an absence of a delivery message from the first control module within a timeout period after communicating the acknowledgment.

19 . The method of claim 15 , wherein operating the driver module in accordance with the third sequence of communications comprises the first control module communicati

Assignees

• Medtronic Minimed Inc

Inventors

• Wang Yongbo
• Chow Steve
• Lewinski David P
• Torres Linda I
• Campbell Alexander S

Classifications

• A61M2230/201

  Glucose concentration · CPC title

• A61M2205/50

  with microprocessors or computers · CPC title

• A61M5/172

  electrical or electronic {(A61M5/16804, A61M5/16831 take precedence)} · CPC title

• A61M5/16877

  Adjusting flow; Devices for setting a flow rate · CPC title

• A61M2205/52

  with memories providing a history of measured variating parameters of apparatus or patient · CPC title