System and method for determining locations of medical devices

• US 7,893,876 B2
• Filed: 11/01/2007
• Issued: 02/22/2011
• Est. Priority Date: 11/01/2007
• Status: Active Grant

• Current Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Original Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Inventors: Brown, Houston, Brightwell, Daniel, Butterfield, Robert
• Primary Examiner(s): Tarcza; Thomas H
• Assistant Examiner(s): LIU, HARRY K
• Application Number:
  US11/933,992
• Publication Number:
  US 20090115663A1
• Time in Patent Office: 1,209 Days
• Field of Search: 342/465
• US Class Current: 342/465
• CPC Class Codes: A61B 2560/0209 adapted for power saving
• CPC Class Codes: A61B 2560/0223 of calibration, e.g. protocols for calibrating sensors
• 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 5/1113 Local tracking of patients, e.g. in a hospital or private home
• CPC Class Codes: G16H 40/20 for the management or administration of healthcare resources or facilities, e.g. managing hospital staff or surgery rooms
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

The location of a medical device is determined by receiving one or more signals at the medical device transmitted by one or more beacons, respectively, at known locations. The one or more signals received at the medical device are sent from the medical device to a processor, which determines the location of the medical device based on the received one or more signals. One of the beacons may be a portable patient beacon, the location of which is determined when its signal is received by a medical device, the location of which was previously determined.

Claims

1. A method of determining a location of a medical device, comprising:

receiving, over a first communication connection, one or more signals at the medical device transmitted by one or more beacons, respectively, at known locations;

sending, over a second communication connection different from the first communication connection, from the medical device the received one or more signals to a processor; and

determining, by the processor, the location of the medical device based on the received one or more signals.

2. The method of claim 1, wherein each of the one or more signals transmitted by the one or more beacons, respectively, are coded with a unique ID.

3. The method of claim 2, wherein the determining comprises:

when a plurality of signals are received at the medical device, measuring a signal strength of each of the plurality of received signals; and

triangulating the location of the medical device based on the measured signal strengths and the unique IDs of each of the plurality of received signals.

4. The method of claim 2, wherein the determining comprises:

if a plurality of signals are received at the medical device, triangulating the location of the medical device based and the respective unique IDs of each of the plurality of received signals.

5. The method of claim 1, further comprising:

receiving, over the first communication connection, a signal at the medical device transmitted by a portable patient beacon;

sending, over the second communication connection, the received signal transmitted by the portable patient beacon to the processor; and

determining, by the processor, a location of the portable patient beacon, based on the determined location of the medical device.

6. The method of claim 1, wherein all of the one or more beacons transmit using the same frequency.

7. The method of claim 1, wherein the one or more beacons are portable such that the relative positioning of the one or more beacons is reconfigurable.

8. The method of claim 1, further comprising periodically powering up a receiver at the medical device and sending currently received signals transmitted by one or more beacons to the processor.

9. The method of claim 1, further comprising recording determined locations of the medical device.

10. The method of claim 5, further comprising reducing a strength of the signal transmitted by the portable patient beacon to limit a range thereof.

11. A system for determining a location of a medical device, comprising:

one or more transmitting units at known locations to transmit one or more signals, respectively;

a receiver at the medical device to receive the one or more signals over a first communication connection; and

a transceiver, communicatively coupled to the receiver, to send the received one or more signals to a processor over a second communication connection different from the first communication connection, the processor determining the location of the medical device based on the received one or more signals.

12. The system of claim 11, wherein each of the one or more signals transmitted by the one or more transmitting units, respectively, are coded with a unique ID.

13. The system of claim 12, wherein the processor is configured to:

when a plurality of signals are received by the receiver, measure a signal strength of each of the plurality of received signals; and

triangulate the location of the medical device based on the measured signal strengths and respective unique IDs of each of the plurality of received signals.

14. The system of claim 12, wherein the processor is configured to, if a plurality of signals are received at the receiver, triangulate the location of the medical device based on the respective unique IDs of each of the plurality of received signals.

15. The system of claim 11, further comprising:

a portable patient beacon to transmit a signal received by the receiver, wherein the transceiver sends the signal to the processor, over the second communication connection, to determine a location of the portable patient beacon, based on the determined location of the medical device.

16. The system of claim 11, wherein all of the one or more transmitting units are configured to transmit using the same frequency.

17. The system of claim 11, wherein the one or more transmitting units are portable such that the relative positioning of the one or more transmitting units is reconfigurable.

18. The system of claim 11, wherein the receiver is configured to periodically power up and communicate with the transceiver to send currently received signals transmitted by one or more transmitting units to the processor.

19. The system of claim 11, further comprising a memory configured to record determined locations of the medical device.

20. The system of claim 15, wherein a strength of the signal transmitted by the portable patient beacon is reducible to limit a range thereof.

21. An apparatus for determining a location of one or more items within an institution, comprising:

one or more beacons at known locations transmitting one or more signals, respectively;

a receiver at an item receiving the one or more signals over a first communication connection;

a transceiver sending the received one or more signals to a processor over a second communication connection different from the first communication connection, the processor determining the location of the item based on the received one or more signals; and

a portable patient beacon transmitting a signal received by the receiver, wherein the transceiver sends the signal transmitted by the portable patient beacon to the processor to determine a location of the portable patient beacon, based on the determined location of the item.