COMMUNICATIONS SYSTEM AND PROTOCOL FOR MEDICAL ENVIRONMENT

• US 20080205311A1
• Filed: 02/22/2007
• Published: 08/28/2008
• Est. Priority Date: 02/22/2007
• Status: Active Grant

• Current Assignee: Rauland-Borg Corporation (Ametek Incorporated)
• Original Assignee: Rauland-Borg Corporation (Ametek Incorporated)
• Inventors: Garcia, Reuben P., Gallagher, Lawrence W., Perkins, Michael C.
• Granted Patent: US 7,768,949 B2
• Time in Patent Office: Days
• US Class Current: 370/310
• CPC Class Codes: A61B 2560/0204 of power management
• CPC Class Codes: A61B 2560/0219 of externally powered implanted units
• CPC Class Codes: A61B 2562/226 comprising means for identifying the connector, e.g. to prevent incorrect connection to socket
• CPC Class Codes: A61B 2562/227 Sensors with electrical connectors
• 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: A61B 5/6887 mounted on external non-worn devices, e.g. non-medical devices
• CPC Class Codes: A61B 5/6891 Furniture
• CPC Class Codes: A61B 5/6892 Mats
• CPC Class Codes: A61G 12/00 Accommodation for nursing, e.g. in hospitals, not covered by groups A61G1/00 - A61G11/00, e.g. trolleys for transport of medicaments or food service or tea-tables, trolleys or wagons A47B31/00; Prescription lists
• CPC Class Codes: A61G 2203/70 with special adaptations, e.g. for safety or comfort
• 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: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 76/18 Management of setup rejection or failure
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

A communications system and protocol are described for wirelessly interconnecting a pair of bed and wall units that communicate the patient information, including bed exit alerts, from the patient supporting equipment to the hospital nurse call system. A linking procedure is provided for establishing a communications link to interconnect the pair of units, wherein the communications link fails upon detection of a third communications device simultaneously undergoing the link attempt mode. In one embodiment, the system provides for advanced collision detection by monitoring corruption of the end-of-packet byte within the periodic check-in message sequences between the linked units to prevent data corruption and future collisions. To ensure prompt interconnection of units, embodiments of the invention provide for a link reminder to alert the health care provider to initiate the steps for linking the bed and wall units whenever two or more unlinked units are in proximity.

Claims

1. A method for establishing a wireless communications link between a pair of medical communications devices, wherein the pair is associated with a mobile hospital bed for relaying patient information to a health care provider, the method comprising:

requesting creation of the wireless communications link in response to a user input at a first medical communications device of the pair;

responding to the request if a user input occurs at a second medical communications device of the pair within a predetermined amount of time after making the request; and

failing to establish the wireless communications link upon detecting an attempt to create the link by a third medical communications device, wherein the attempt is detected prior to establishing the link.

2. The method of claim 1 wherein the wireless communications link between the pair of medical communications devices is a first communications link and the pair is a first pair, the method further comprising establishing a second communications link between a second pair of medical communications devices, wherein the second pair includes one of the medical communications devices of the first pair.

3. The method of claim 1 wherein the user inputs at the first and second medical communications devices includes pressing a button at each of the medical communications devices within the predetermined amount of time.

4. The method of claim 1 wherein the first and second medical communications devices exchange unique addresses identifying the devices in order to establish the wireless communications link.

5. The method of claim 4 wherein exchanging the unique addresses further comprises exchanging device serial numbers.

6. The method of claim 1 wherein at least one of the first and second medical communications devices reduces power consumption after establishing the wireless communications link.

7. The method of claim 6 wherein the other of the first and second medical communications devices remains fully powered after establishing the wireless communications link.

8. The method of claim 1 wherein the patient information includes at least one of a patient occupancy status signal associated with the mobile hospital bed, a nurse call signal, a call assurance signal, and a system status signal associated with at least one of the devices within the pair.

9. A network for establishing a wireless communications link between a pair of medical communications transceivers, the network comprising:

a first transceiver attached to a mobile hospital bed for relaying patient information to a second transceiver separated from the mobile hospital bed, the second transceiver communicating the patient information to a health care provider;

one of the transceivers including a transmitter for requesting establishment of the wireless communications link between the pair of transceivers; and

at least one of the transceivers including a receiver for failing to establish the communications link upon detecting an attempt to establish a different wireless communications link for relaying the patient information.

10. The network of claim 9 wherein the wireless communications link between the pair of medical communications transceivers is a first communications link and the pair is a first pair, the network further comprising a third medical communications transceiver for establishing a second communications link between a second pair of medical communications transceivers, wherein the second pair includes the third medical communications transceiver and one of the medical communications transceivers of the first pair.

11. The network of claim 9 wherein the second transceiver communicates the patient information to the health care provider through a hospital communications network for monitoring the patient information.

12. The network of claim 9 including a user interface associated with the transmitter for initiating the request to establish the wireless communications link in response to a user input at the user interface.

13. The network of claim 12 including a user interface associated with the at least one receiver for initiating a response to a user input at the user interface, said response being received within a predetermined amount of time after the request for establishing the link in order for the link to be successfully established.

14. The network of claim 9 wherein the patient information includes at least one of a patient occupancy status signal associated with the mobile hospital bed, a nurse call signal, a call assurance signal, and a system status signal associated with at least one of the devices within the pair.

15. A medical communications device for wirelessly relaying patient information from a mobile hospital apparatus to a fixed site, the medical communications device comprising:

a housing secured to the mobile hospital apparatus;

a user interface for receiving user inputs;

a transceiver for supporting the wireless communications link with the fixed site;

a controller connected to the user interface and the transceiver for cooperating with the fixed site in order to (1) initiate an attempt at establishing the wireless communications link in response to a user input and (2) fail completion of the link when the attempt to establish the link overlaps an attempt to establish another link originating from a source other than either the device or the fixed site.

16. The medical communications device of claim 15 wherein the wireless communications link between the device and the fixed site is a first communications link and wherein the fixed site establishes a second communications link with the source of the attempt to establish the other link.

17. The medical communications device of claim 15 wherein the controller includes timing circuitry requiring receipt of one or more user inputs within a predetermined amount of time after the attempt to establish the wireless communications link in order to successfully establish the link.

18. The medical communications device of claim 15 wherein the fixed site is associated with a hospital communications network for communicating the patient information to a health care provider.

19. The medical communications device of claim 15 wherein the patient information includes at least one of a patient occupancy status signal associated with the mobile hospital apparatus, a nurse call signal, a call assurance signal, a system status signal associated with at least one of the medical communications device and the fixed site.

20. A fixed medical communications device for communicating patient information between the device and a mobile unit via a wireless communications link, where the mobile unit is associated with a hospital apparatus, the fixed medical communications device comprising:

a user interface for receiving user inputs;

a transceiver supporting the wireless communications link with the mobile unit; and

a controller connected to the user interface and the transceiver for cooperating with the mobile unit in order to (1) initiate an attempt at establishing the wireless communications link in response to a user input and (2) fail completion of the link when the attempt to establish the link overlaps an attempt to establish another link originating from a source other than either the fixed medical communications device or the mobile unit.

21. The fixed medical communications device of claim 20 wherein the wireless communications link between the fixed medical communications device and the mobile unit is a first communications link and wherein the fixed medical communications device establishes a second communications link with the source of the attempt to establish the other link.

22. The fixed medical communications device of claim 20 wherein the device communicates the patient information to a health care provider through a hospital communications network for monitoring the patient information.

23. The fixed medical communications device of claim 20 wherein the controller includes timing circuitry requiring receipt of one or more user inputs within a predetermined amount of time after the attempt to establish the wireless communications link in order to successfully establish the link.

24. The fixed medical communications device of claim 20 wherein the patient information includes at least one of a patient occupancy status signal associated with the hospital apparatus, a nurse call signal, a call assurance signal, and a system status signal associated with at least one of the fixed medical communications device and the mobile unit.