Identification of devices in a medical device network and wireless data communication techniques utilizing device identifiers

• US 8,095,692 B2
• Filed: 03/30/2011
• Issued: 01/10/2012
• Est. Priority Date: 04/28/2006
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Mehta, Kaezad J., Jollota, James, Patel, Himanshu
• Primary Examiner(s): Hafiz, Tariq
• Assistant Examiner(s): LEWIS-TAYLOR, DAYTON A.
• Application Number:
  US13/075,394
• Publication Number:
  US 20110176490A1
• Time in Patent Office: 286 Days
• Field of Search: 709/208, 709/217
• US Class Current: 710/3
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61M 2205/18 with alarm
• CPC Class Codes: A61M 2205/3561 local, e.g. within room or hospital
• CPC Class Codes: A61M 2205/3584 using modem, internet or bluetooth
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• 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 5/142 Pressure infusion, e.g. using pumps
• 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
• CPC Class Codes: G16H 40/67 for remote operation
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H04L 63/061 for key exchange, e.g. in peer-to-peer networks cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838
• CPC Class Codes: H04L 63/126 the source of the received data
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks
• CPC Class Codes: H04W 88/06 : adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y10S 370/913 : Wireless or radio

Abstract

A fluid infusion system as described herein includes a number of local “body network” devices, such as an infusion pump, a handheld monitor or controller, a physiological sensor, and a bedside or hospital monitor. The body network devices can be configured to support communication of status data, physiological information, alerts, control signals, and other information between one another. In addition, the body network devices can be configured to support networked communication of status data, physiological information, alerts, control signals, and other information between the body network devices and “external” devices, systems, or communication networks. The networked medical devices are configured to support a variety of wireless data communication protocols for efficient communication of data within the medical device network. In addition, the wireless medical devices may be configured to support a number of dynamically adjustable wireless data communication modes to react to current operating conditions, application-specific data content, or other criteria.

Claims

1. A communication method for a medical device network having a wireless fluid infusion device to deliver a medication fluid to the body of a user, a wireless physiological sensor transmitter to measure a physiological characteristic of the user and to wirelessly transmit data indicative of the measured physiological characteristic, and a wireless monitor-controller device to monitor the user and control operation of the wireless fluid infusion device, wherein the wireless fluid infusion device, the wireless physiological sensor transmitter, and the wireless-monitor controller device are configured to communicate data between each other using an asynchronous data communication protocol, the method comprising:

operating the wireless monitor-controller device as a master device of the medical device network;

operating the wireless fluid infusion device and the wireless physiological sensor transmitter as slave devices of the medical device network;

maintaining, at the wireless monitor-controller device, a first key that uniquely identifies the wireless monitor-controller device within the medical device network, a second key that uniquely identifies the wireless fluid infusion device within the medical device network, and a third key that uniquely identifies the wireless physiological characteristic sensor transmitter within the medical device network;

maintaining, at the wireless fluid infusion device, the first key and the second key and the third key;

maintaining, at the wireless physiological characteristic sensor transmitter, the first key, the second key, and the third key;

the wireless physiological characteristic sensor transmitter transmitting a data packet intended for the wireless monitor-controller device, the data packet conveying a quantity of data indicative of the measured physiological characteristic of the user along with the first key and the third key;

the wireless monitor-controller device transmitting a response packet intended for the wireless physiological characteristic sensor transmitter, the response packet conveying the first key and the third key; and

in response to the quantity of data indicative of the measured physiological characteristic of the user, the wireless monitor-controller device transmitting a command packet intended for the wireless fluid infusion device, the command packet conveying a quantity of data indicative of a control command for the wireless fluid infusion device, and the command packet conveying the first key and the second key.

2. A method according to claim 1, wherein the response packet conveys an acknowledgement of the data packet.

3. A method according to claim 1, further comprising:

the wireless monitor-controller device receiving the data packet;

the wireless monitor-controller device extracting the third key from the data packet; and

the wireless monitor-controller device analyzing the third key to identify the wireless physiological sensor transmitter.

4. A method according to claim 1, further comprising:

the wireless monitor-controller device receiving the data packet;

the wireless monitor-controller device extracting the quantity of data; and

the wireless monitor-controller device analyzing the quantity of data to determine whether the data packet was intended for the wireless monitor-controller device.

5. A method according to claim 1, further comprising:

the wireless physiological characteristic sensor transmitter receiving the response packet;

the wireless physiological characteristic sensor transmitter extracting the second first key from the response packet; and

the wireless physiological characteristic sensor transmitter analyzing the second key to determine whether the response packet was intended for the wireless physiological characteristic sensor transmitter first device.

6. A method according to claim 1, further comprising:

receiving the command packet at the wireless fluid infusion device; and

operating the wireless fluid infusion device in accordance with the control command.